From 51312f70fde779f59dcc48b41132291c10d3ad0b Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 11:44:14 +0700
Subject: [PATCH 1/7] move make to examples/build_system

add -Wl,--no-warn-rwx-segment for gcc 12+
---
 .../build_system}/make/cpu/arm1176.mk          |  0
 .../build_system}/make/cpu/cortex-a53.mk       |  0
 .../build_system}/make/cpu/cortex-a72.mk       |  0
 .../build_system}/make/cpu/cortex-m0.mk        |  0
 .../build_system}/make/cpu/cortex-m0plus.mk    |  0
 .../build_system}/make/cpu/cortex-m3.mk        |  0
 .../build_system}/make/cpu/cortex-m33.mk       |  0
 .../build_system}/make/cpu/cortex-m4.mk        |  0
 .../build_system}/make/cpu/cortex-m7.mk        |  0
 .../build_system}/make/toolchain/arm_gcc.mk    |  9 ++++++++-
 .../make/toolchain/arm_gcc_rules.mk            |  0
 .../build_system}/make/toolchain/arm_iar.mk    |  0
 .../make/toolchain/arm_iar_rules.mk            |  0
 examples/make.mk                               | 18 ++++++++----------
 examples/rules.mk                              |  2 +-
 tools/build_family.py                          |  3 ++-
 16 files changed, 19 insertions(+), 13 deletions(-)
 rename {tools => examples/build_system}/make/cpu/arm1176.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-a53.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-a72.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m0.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m0plus.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m3.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m33.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m4.mk (100%)
 rename {tools => examples/build_system}/make/cpu/cortex-m7.mk (100%)
 rename {tools => examples/build_system}/make/toolchain/arm_gcc.mk (87%)
 rename {tools => examples/build_system}/make/toolchain/arm_gcc_rules.mk (100%)
 rename {tools => examples/build_system}/make/toolchain/arm_iar.mk (100%)
 rename {tools => examples/build_system}/make/toolchain/arm_iar_rules.mk (100%)

diff --git a/tools/make/cpu/arm1176.mk b/examples/build_system/make/cpu/arm1176.mk
similarity index 100%
rename from tools/make/cpu/arm1176.mk
rename to examples/build_system/make/cpu/arm1176.mk
diff --git a/tools/make/cpu/cortex-a53.mk b/examples/build_system/make/cpu/cortex-a53.mk
similarity index 100%
rename from tools/make/cpu/cortex-a53.mk
rename to examples/build_system/make/cpu/cortex-a53.mk
diff --git a/tools/make/cpu/cortex-a72.mk b/examples/build_system/make/cpu/cortex-a72.mk
similarity index 100%
rename from tools/make/cpu/cortex-a72.mk
rename to examples/build_system/make/cpu/cortex-a72.mk
diff --git a/tools/make/cpu/cortex-m0.mk b/examples/build_system/make/cpu/cortex-m0.mk
similarity index 100%
rename from tools/make/cpu/cortex-m0.mk
rename to examples/build_system/make/cpu/cortex-m0.mk
diff --git a/tools/make/cpu/cortex-m0plus.mk b/examples/build_system/make/cpu/cortex-m0plus.mk
similarity index 100%
rename from tools/make/cpu/cortex-m0plus.mk
rename to examples/build_system/make/cpu/cortex-m0plus.mk
diff --git a/tools/make/cpu/cortex-m3.mk b/examples/build_system/make/cpu/cortex-m3.mk
similarity index 100%
rename from tools/make/cpu/cortex-m3.mk
rename to examples/build_system/make/cpu/cortex-m3.mk
diff --git a/tools/make/cpu/cortex-m33.mk b/examples/build_system/make/cpu/cortex-m33.mk
similarity index 100%
rename from tools/make/cpu/cortex-m33.mk
rename to examples/build_system/make/cpu/cortex-m33.mk
diff --git a/tools/make/cpu/cortex-m4.mk b/examples/build_system/make/cpu/cortex-m4.mk
similarity index 100%
rename from tools/make/cpu/cortex-m4.mk
rename to examples/build_system/make/cpu/cortex-m4.mk
diff --git a/tools/make/cpu/cortex-m7.mk b/examples/build_system/make/cpu/cortex-m7.mk
similarity index 100%
rename from tools/make/cpu/cortex-m7.mk
rename to examples/build_system/make/cpu/cortex-m7.mk
diff --git a/tools/make/toolchain/arm_gcc.mk b/examples/build_system/make/toolchain/arm_gcc.mk
similarity index 87%
rename from tools/make/toolchain/arm_gcc.mk
rename to examples/build_system/make/toolchain/arm_gcc.mk
index bba0607df..071b13f68 100644
--- a/tools/make/toolchain/arm_gcc.mk
+++ b/examples/build_system/make/toolchain/arm_gcc.mk
@@ -9,6 +9,8 @@ GDB = $(CROSS_COMPILE)gdb
 OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size
 
+CC_VERSION := $(shell $(CC) -dumpversion)
+
 # ---------------------------------------
 # Compiler Flags
 # ---------------------------------------
@@ -65,7 +67,12 @@ LDFLAGS += \
   -Wl,-cref \
   -Wl,-gc-sections \
 
-# Some toolchain such as renesas rx does not support --print-memory-usage flags
+# renesas rx does not support --print-memory-usage flags
 ifneq ($(FAMILY),rx)
 LDFLAGS += -Wl,--print-memory-usage
 endif
+
+# from version 12
+ifeq (12,$(firstword $(sort 12 $(CC_VERSION))))
+LDFLAGS += -Wl,--no-warn-rwx-segment
+endif
diff --git a/tools/make/toolchain/arm_gcc_rules.mk b/examples/build_system/make/toolchain/arm_gcc_rules.mk
similarity index 100%
rename from tools/make/toolchain/arm_gcc_rules.mk
rename to examples/build_system/make/toolchain/arm_gcc_rules.mk
diff --git a/tools/make/toolchain/arm_iar.mk b/examples/build_system/make/toolchain/arm_iar.mk
similarity index 100%
rename from tools/make/toolchain/arm_iar.mk
rename to examples/build_system/make/toolchain/arm_iar.mk
diff --git a/tools/make/toolchain/arm_iar_rules.mk b/examples/build_system/make/toolchain/arm_iar_rules.mk
similarity index 100%
rename from tools/make/toolchain/arm_iar_rules.mk
rename to examples/build_system/make/toolchain/arm_iar_rules.mk
diff --git a/examples/make.mk b/examples/make.mk
index 448d7883d..b646b46ce 100644
--- a/examples/make.mk
+++ b/examples/make.mk
@@ -2,14 +2,10 @@
 # Common make definition for all examples
 # ---------------------------------------
 
-# Supported toolchain: gcc, iar
-TOOLCHAIN ?= gcc
-
 #-------------- TOP and CURRENT_PATH ------------
 
-# Set TOP to be the path to get from the current directory (where make was
-# invoked) to the top of the tree. $(lastword $(MAKEFILE_LIST)) returns
-# the name of this makefile relative to where make was invoked.
+# Set TOP to be the path to get from the current directory (where make was invoked) to the top of the tree.
+# $(lastword $(MAKEFILE_LIST)) returns the name of this makefile relative to where make was invoked.
 THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST))
 
 # strip off /tools/top.mk to get for example ../../..
@@ -38,7 +34,6 @@ __check_defined = \
     $(if $(value $1),, \
     $(error Undefined make flag: $1$(if $2, ($2))))
 
-
 # Build directory
 BUILD := _build/$(BOARD)
 
@@ -73,7 +68,10 @@ else
   SRC_C += $(subst $(TOP)/,,$(wildcard $(TOP)/$(FAMILY_PATH)/*.c))
 endif
 
-#-------------- Cross Compiler  ------------
+#-------------- Toolchain  ------------
+
+# Supported toolchain: gcc, iar
+TOOLCHAIN ?= gcc
 
 # Can be set by board, default to ARM GCC
 CROSS_COMPILE ?= arm-none-eabi-
@@ -139,8 +137,8 @@ endif
 
 # CPU specific flags
 ifdef CPU_CORE
-include $(TOP)/tools/make/cpu/$(CPU_CORE).mk
+  include ${TOP}/examples/build_system/make/cpu/$(CPU_CORE).mk
 endif
 
 # toolchain specific
-include $(TOP)/tools/make/toolchain/arm_$(TOOLCHAIN).mk
+include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN).mk
diff --git a/examples/rules.mk b/examples/rules.mk
index 227849a18..b02665cdd 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -37,7 +37,7 @@ vpath %.c . $(TOP)
 vpath %.s . $(TOP)
 vpath %.S . $(TOP)
 
-include $(TOP)/tools/make/toolchain/arm_$(TOOLCHAIN)_rules.mk
+include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN)_rules.mk
 
 
 OBJ_DIRS = $(sort $(dir $(OBJ)))
diff --git a/tools/build_family.py b/tools/build_family.py
index fb90e0edb..cd9884313 100644
--- a/tools/build_family.py
+++ b/tools/build_family.py
@@ -34,6 +34,7 @@ def build_family(example, family, make_option):
         # sum all element of same index (column sum)
         return list(map(sum, list(zip(*result))))
 
+
 if __name__ == '__main__':
     # IAR CC
     if make_iar_option not in sys.argv:
@@ -44,7 +45,7 @@ if __name__ == '__main__':
     for d in os.scandir("examples"):
         if d.is_dir() and 'cmake' not in d.name:
             for entry in os.scandir(d.path):
-                if entry.is_dir() and 'cmake' not in entry.name:
+                if entry.is_dir() and 'cmake' not in entry.name and entry.name != 'build_system':
                     all_examples.append(d.name + '/' + entry.name)
     filter_with_input(all_examples)
     all_examples.sort()

From e54a2c4f3c65551e091cdc79acff5f3aa607cff3 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 11:46:39 +0700
Subject: [PATCH 2/7] rename build_family.py to build_make.py

---
 .github/workflows/build_aarch64.yml      | 2 +-
 .github/workflows/build_arm.yml          | 2 +-
 .github/workflows/build_msp430.yml       | 2 +-
 .github/workflows/build_renesas.yml      | 2 +-
 .github/workflows/build_riscv.yml        | 2 +-
 .github/workflows/build_win_mac.yml      | 2 +-
 tools/{build_family.py => build_make.py} | 0
 7 files changed, 6 insertions(+), 6 deletions(-)
 rename tools/{build_family.py => build_make.py} (100%)

diff --git a/.github/workflows/build_aarch64.yml b/.github/workflows/build_aarch64.yml
index 6ac7ad015..8a91ee630 100644
--- a/.github/workflows/build_aarch64.yml
+++ b/.github/workflows/build_aarch64.yml
@@ -73,7 +73,7 @@ jobs:
       run: python3 tools/get_deps.py ${{ matrix.family }}
 
     - name: Build
-      run: python3 tools/build_family.py ${{ matrix.family }}
+      run: python3 tools/build_make.py ${{ matrix.family }}
 
     - name: Linker Map
       run: |
diff --git a/.github/workflows/build_arm.yml b/.github/workflows/build_arm.yml
index 171c1fec3..402b89e0a 100644
--- a/.github/workflows/build_arm.yml
+++ b/.github/workflows/build_arm.yml
@@ -66,7 +66,7 @@ jobs:
       run: python3 tools/get_deps.py ${{ matrix.family }}
 
     - name: Build
-      run: python3 tools/build_family.py ${{ matrix.family }}
+      run: python3 tools/build_make.py ${{ matrix.family }}
 
     - name: Linker Map
       run: |
diff --git a/.github/workflows/build_msp430.yml b/.github/workflows/build_msp430.yml
index c62056940..60c5feef3 100644
--- a/.github/workflows/build_msp430.yml
+++ b/.github/workflows/build_msp430.yml
@@ -71,7 +71,7 @@ jobs:
       run: python3 tools/get_deps.py ${{ matrix.family }}
 
     - name: Build
-      run: python3 tools/build_family.py ${{ matrix.family }}
+      run: python3 tools/build_make.py ${{ matrix.family }}
 
     - name: Linker Map
       run: |
diff --git a/.github/workflows/build_renesas.yml b/.github/workflows/build_renesas.yml
index 66b98a71b..1cc4f8132 100644
--- a/.github/workflows/build_renesas.yml
+++ b/.github/workflows/build_renesas.yml
@@ -71,7 +71,7 @@ jobs:
       run: python3 tools/get_deps.py ${{ matrix.family }}
 
     - name: Build
-      run: python3 tools/build_family.py ${{ matrix.family }}
+      run: python3 tools/build_make.py ${{ matrix.family }}
 
     - name: Linker Map
       run: |
diff --git a/.github/workflows/build_riscv.yml b/.github/workflows/build_riscv.yml
index 8ec549072..dfc6b672f 100644
--- a/.github/workflows/build_riscv.yml
+++ b/.github/workflows/build_riscv.yml
@@ -72,7 +72,7 @@ jobs:
       run: python3 tools/get_deps.py ${{ matrix.family }}
 
     - name: Build
-      run: python3 tools/build_family.py ${{ matrix.family }}
+      run: python3 tools/build_make.py ${{ matrix.family }}
 
     - name: Linker Map
       run: |
diff --git a/.github/workflows/build_win_mac.yml b/.github/workflows/build_win_mac.yml
index cb879a705..f6a42cf0a 100644
--- a/.github/workflows/build_win_mac.yml
+++ b/.github/workflows/build_win_mac.yml
@@ -51,4 +51,4 @@ jobs:
       run: python3 tools/get_deps.py stm32f4
 
     - name: Build
-      run: python3 tools/build_family.py stm32f4 stm32f411disco
+      run: python3 tools/build_make.py stm32f4 stm32f411disco
diff --git a/tools/build_family.py b/tools/build_make.py
similarity index 100%
rename from tools/build_family.py
rename to tools/build_make.py

From 1a98f5389c70d159f359c5bfe369d1cbf3af7475 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 12:07:59 +0700
Subject: [PATCH 3/7] correct gcc version major comparison

---
 examples/build_system/make/toolchain/arm_gcc.mk | 3 ++-
 hw/bsp/stm32f1/family.mk                        | 5 ++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/examples/build_system/make/toolchain/arm_gcc.mk b/examples/build_system/make/toolchain/arm_gcc.mk
index 071b13f68..b87657f53 100644
--- a/examples/build_system/make/toolchain/arm_gcc.mk
+++ b/examples/build_system/make/toolchain/arm_gcc.mk
@@ -10,6 +10,7 @@ OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size
 
 CC_VERSION := $(shell $(CC) -dumpversion)
+CC_VERSION_MAJOR = $(firstword $(subst ., ,$(CC_VERSION)))
 
 # ---------------------------------------
 # Compiler Flags
@@ -73,6 +74,6 @@ LDFLAGS += -Wl,--print-memory-usage
 endif
 
 # from version 12
-ifeq (12,$(firstword $(sort 12 $(CC_VERSION))))
+ifeq ($(shell expr $(CC_VERSION_MAJOR) \>= 12),1)
 LDFLAGS += -Wl,--no-warn-rwx-segment
 endif
diff --git a/hw/bsp/stm32f1/family.mk b/hw/bsp/stm32f1/family.mk
index c9321c3cb..d3627f47a 100644
--- a/hw/bsp/stm32f1/family.mk
+++ b/hw/bsp/stm32f1/family.mk
@@ -40,6 +40,5 @@ INC += \
 SRC_S_GCC += $(ST_CMSIS)/Source/Templates/gcc/startup_$(MCU_VARIANT).s
 SRC_S_IAR += $(ST_CMSIS)/Source/Templates/iar/startup_$(MCU_VARIANT).s
 
-# flash target ROM bootloader
-flash-dfu-util: $(BUILD)/$(PROJECT).bin
-	dfu-util -R -a 0 --dfuse-address 0x08000000 -D $<
+# flash target ROM bootloader: flash-dfu-util
+DFU_UTIL_OPTION = -a 0 --dfuse-address 0x08000000

From 82880eecbd51ce8cf801ae0c04871e65f81826f4 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 12:43:13 +0700
Subject: [PATCH 4/7] make nanolib linking explicitly by each family/board

---
 examples/build_system/make/cpu/cortex-m23.mk  |  14 +
 .../make/toolchain/arm_gcc_rules.mk           |   4 -
 hw/bsp/ch32v307/family.mk                     |   2 +
 hw/bsp/da14695_dk_usb/board.mk                |   4 +-
 hw/bsp/da1469x_dk_pro/board.mk                |   4 +-
 hw/bsp/f1c100s/board.mk                       |   6 +-
 hw/bsp/fomu/family.mk                         |   6 +-
 hw/bsp/imxrt/family.mk                        |   4 +-
 hw/bsp/kinetis_k32l2/family.mk                |   2 +
 hw/bsp/kinetis_kl/family.mk                   |   1 +
 hw/bsp/lpc11/family.mk                        |   2 +
 hw/bsp/lpc13/family.mk                        |   2 +
 hw/bsp/lpc15/family.mk                        |   2 +
 hw/bsp/lpc17/family.mk                        |   2 +-
 hw/bsp/lpc18/family.mk                        |   3 +-
 hw/bsp/lpc40/family.mk                        |   2 +
 hw/bsp/lpc43/family.mk                        |   2 +
 hw/bsp/lpc51/family.mk                        |   2 +
 hw/bsp/lpc54/family.mk                        |   3 +-
 hw/bsp/lpc55/family.mk                        |   3 +-
 hw/bsp/mcx/family.mk                          |   2 +
 hw/bsp/mm32/family.mk                         |   2 +
 hw/bsp/msp432e4/family.mk                     |   2 +
 hw/bsp/ngx4330/board.mk                       |  47 ---
 hw/bsp/ngx4330/ngx4330.c                      | 271 --------------
 hw/bsp/ngx4330/ngx4330.ld                     | 343 ------------------
 hw/bsp/nrf/family.mk                          |  11 +-
 hw/bsp/nutiny_nuc121s/board.mk                |   2 +
 hw/bsp/nutiny_nuc125s/board.mk                |   2 +
 hw/bsp/nutiny_nuc126v/board.mk                |   2 +
 hw/bsp/nutiny_sdk_nuc120/board.mk             |   2 +
 hw/bsp/nutiny_sdk_nuc505/board.mk             |   2 +
 hw/bsp/ra/family.mk                           |   2 +
 hw/bsp/rx/family.mk                           |   2 +
 hw/bsp/samd11/family.mk                       |   2 +
 hw/bsp/samd21/family.mk                       |   2 +
 hw/bsp/samd51/family.mk                       |   2 +
 hw/bsp/same5x/family.mk                       |   2 +
 hw/bsp/same70_qmtech/board.mk                 |   3 +-
 hw/bsp/same70_xplained/board.mk               |   3 +-
 hw/bsp/samg55xplained/board.mk                |   3 +-
 hw/bsp/saml2x/family.mk                       |   2 +
 hw/bsp/sltb009a/board.mk                      |   2 +
 hw/bsp/spresense/board.mk                     |   2 +
 hw/bsp/stm32f0/family.mk                      |   2 +
 hw/bsp/stm32f1/family.mk                      |   2 +
 hw/bsp/stm32f2/family.mk                      |   2 +
 hw/bsp/stm32f3/family.mk                      |   2 +
 hw/bsp/stm32f4/family.mk                      |   2 +
 hw/bsp/stm32f7/family.mk                      |   2 +
 hw/bsp/stm32g0/family.mk                      |   2 +
 hw/bsp/stm32g4/family.mk                      |   2 +
 hw/bsp/stm32h7/family.mk                      |   2 +
 hw/bsp/stm32l0/family.mk                      |   2 +
 hw/bsp/stm32l4/family.mk                      |   2 +
 hw/bsp/stm32u5/family.mk                      |   2 +
 hw/bsp/stm32wb/family.mk                      |   2 +
 hw/bsp/tm4c123/family.mk                      |   3 +-
 58 files changed, 130 insertions(+), 684 deletions(-)
 create mode 100644 examples/build_system/make/cpu/cortex-m23.mk
 delete mode 100644 hw/bsp/ngx4330/board.mk
 delete mode 100644 hw/bsp/ngx4330/ngx4330.c
 delete mode 100644 hw/bsp/ngx4330/ngx4330.ld

diff --git a/examples/build_system/make/cpu/cortex-m23.mk b/examples/build_system/make/cpu/cortex-m23.mk
new file mode 100644
index 000000000..29542d8e8
--- /dev/null
+++ b/examples/build_system/make/cpu/cortex-m23.mk
@@ -0,0 +1,14 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -mthumb \
+    -mcpu=cortex-m23 \
+    -mfloat-abi=soft \
+
+else ifeq ($(TOOLCHAIN),iar)
+  # IAR Flags
+  CFLAGS += --cpu cortex-m23
+  ASFLAGS += --cpu cortex-m23
+endif
+
+# For freeRTOS port source
+FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM23
diff --git a/examples/build_system/make/toolchain/arm_gcc_rules.mk b/examples/build_system/make/toolchain/arm_gcc_rules.mk
index b76d4aec3..d295879d9 100644
--- a/examples/build_system/make/toolchain/arm_gcc_rules.mk
+++ b/examples/build_system/make/toolchain/arm_gcc_rules.mk
@@ -31,10 +31,6 @@ ifdef LD_FILE_GCC
 LDFLAGS += -Wl,-T,$(TOP)/$(LD_FILE_GCC)
 endif
 
-ifneq ($(SKIP_NANOLIB), 1)
-LDFLAGS += --specs=nosys.specs --specs=nano.specs
-endif
-
 ASFLAGS += $(CFLAGS)
 
 LIBS_GCC ?= -lgcc -lm -lnosys
diff --git a/hw/bsp/ch32v307/family.mk b/hw/bsp/ch32v307/family.mk
index 4b06cf429..fa64c1d7e 100644
--- a/hw/bsp/ch32v307/family.mk
+++ b/hw/bsp/ch32v307/family.mk
@@ -28,6 +28,8 @@ CFLAGS += \
 	-Xlinker --gc-sections \
 	-DBOARD_TUD_MAX_SPEED=OPT_MODE_HIGH_SPEED
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/wch/ch32v307/dcd_usbhs.c \
 	$(CH32V307_SDK_SRC)/Core/core_riscv.c \
diff --git a/hw/bsp/da14695_dk_usb/board.mk b/hw/bsp/da14695_dk_usb/board.mk
index 1f7bc1588..980b1a361 100644
--- a/hw/bsp/da14695_dk_usb/board.mk
+++ b/hw/bsp/da14695_dk_usb/board.mk
@@ -1,3 +1,5 @@
+MCU_FAMILY_DIR = hw/mcu/dialog/da1469x
+
 CFLAGS += \
   -flto \
   -mthumb \
@@ -11,7 +13,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_DA1469X \
   -DCFG_TUD_ENDPOINT0_SIZE=8\
 
-MCU_FAMILY_DIR = hw/mcu/dialog/da1469x
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/da1469x.ld
diff --git a/hw/bsp/da1469x_dk_pro/board.mk b/hw/bsp/da1469x_dk_pro/board.mk
index f9bf480de..5282f93a3 100644
--- a/hw/bsp/da1469x_dk_pro/board.mk
+++ b/hw/bsp/da1469x_dk_pro/board.mk
@@ -1,3 +1,5 @@
+MCU_FAMILY_DIR = hw/mcu/dialog/da1469x
+
 CFLAGS += \
   -flto \
   -mthumb \
@@ -11,7 +13,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_DA1469X \
   -DCFG_TUD_ENDPOINT0_SIZE=8\
 
-MCU_FAMILY_DIR = hw/mcu/dialog/da1469x
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/da1469x.ld
diff --git a/hw/bsp/f1c100s/board.mk b/hw/bsp/f1c100s/board.mk
index 9062483b0..3596e5414 100644
--- a/hw/bsp/f1c100s/board.mk
+++ b/hw/bsp/f1c100s/board.mk
@@ -1,5 +1,5 @@
+MCU_DIR = hw/mcu/allwinner/f1c100s
 DEPS_SUBMODULES += hw/mcu/allwinner
-
 DEFINES += -D__ARM32_ARCH__=5 -D__ARM926EJS__
 
 CFLAGS += \
@@ -18,8 +18,8 @@ CFLAGS += \
   $(DEFINES)
 
 LD_FILE = hw/mcu/allwinner/f1c100s/f1c100s.ld
-LDFLAGS += -nostdlib -lgcc
-MCU_DIR = hw/mcu/allwinner/f1c100s
+# TODO may skip nanolib
+LDFLAGS += -nostdlib -lgcc -specs=nosys.specs -specs=nano.specs
 
 SRC_C += \
 	src/portable/sunxi/dcd_sunxi_musb.c \
diff --git a/hw/bsp/fomu/family.mk b/hw/bsp/fomu/family.mk
index d0b819120..f8a3c9ebf 100644
--- a/hw/bsp/fomu/family.mk
+++ b/hw/bsp/fomu/family.mk
@@ -1,3 +1,6 @@
+# Toolchain from https://github.com/xpack-dev-tools/riscv-none-embed-gcc-xpack
+CROSS_COMPILE = riscv-none-embed-
+
 CFLAGS += \
   -flto \
   -march=rv32i \
@@ -5,8 +8,7 @@ CFLAGS += \
   -nostdlib \
   -DCFG_TUSB_MCU=OPT_MCU_VALENTYUSB_EPTRI
 
-# Toolchain from https://github.com/xpack-dev-tools/riscv-none-embed-gcc-xpack
-CROSS_COMPILE = riscv-none-embed-
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = $(FAMILY_PATH)/fomu.ld
diff --git a/hw/bsp/imxrt/family.mk b/hw/bsp/imxrt/family.mk
index 90d566cfb..c6adcba5a 100644
--- a/hw/bsp/imxrt/family.mk
+++ b/hw/bsp/imxrt/family.mk
@@ -5,8 +5,8 @@ DEPS_SUBMODULES += $(SDK_DIR) lib/CMSIS_5
 include $(TOP)/$(BOARD_PATH)/board.mk
 
 CPU_CORE ?= cortex-m7
-
 MCU_VARIANT_WITH_CORE = ${MCU_VARIANT}${MCU_CORE}
+MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
 
 CFLAGS += \
   -D__ARMVFP__=0 \
@@ -26,7 +26,7 @@ endif
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter -Wno-error=implicit-fallthrough -Wno-error=redundant-decls
 
-MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE ?= $(MCU_DIR)/gcc/$(MCU_VARIANT)xxxxx${MCU_CORE}_flexspi_nor.ld
diff --git a/hw/bsp/kinetis_k32l2/family.mk b/hw/bsp/kinetis_k32l2/family.mk
index 357485762..0bfd57d29 100644
--- a/hw/bsp/kinetis_k32l2/family.mk
+++ b/hw/bsp/kinetis_k32l2/family.mk
@@ -9,6 +9,8 @@ CPU_CORE ?= cortex-m0plus
 CFLAGS += \
 	-DCFG_TUSB_MCU=OPT_MCU_KINETIS_K32L
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/nxp/khci/dcd_khci.c \
 	src/portable/nxp/khci/hcd_khci.c \
diff --git a/hw/bsp/kinetis_kl/family.mk b/hw/bsp/kinetis_kl/family.mk
index edb2f3366..e331d82b7 100644
--- a/hw/bsp/kinetis_kl/family.mk
+++ b/hw/bsp/kinetis_kl/family.mk
@@ -9,6 +9,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_KINETIS_KL \
 
 LDFLAGS += \
+  -specs=nosys.specs -specs=nano.specs \
   -Wl,--defsym,__stack_size__=0x400 \
   -Wl,--defsym,__heap_size__=0
 
diff --git a/hw/bsp/lpc11/family.mk b/hw/bsp/lpc11/family.mk
index dee85da90..ce07ff450 100644
--- a/hw/bsp/lpc11/family.mk
+++ b/hw/bsp/lpc11/family.mk
@@ -11,6 +11,8 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_LPC11UXX \
   -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))'
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/nxp/lpc_ip3511/dcd_lpc_ip3511.c \
 	$(MCU_DIR)/../gcc/cr_startup_lpc$(MCU_DRV).c \
diff --git a/hw/bsp/lpc13/family.mk b/hw/bsp/lpc13/family.mk
index 10cf4969d..6964dc48a 100644
--- a/hw/bsp/lpc13/family.mk
+++ b/hw/bsp/lpc13/family.mk
@@ -14,6 +14,8 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_LPC13XX \
   -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))'
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # startup.c and lpc_types.h cause following errors
 CFLAGS += -Wno-error=strict-prototypes -Wno-error=redundant-decls
 
diff --git a/hw/bsp/lpc15/family.mk b/hw/bsp/lpc15/family.mk
index 9f489832f..28ab1db7b 100644
--- a/hw/bsp/lpc15/family.mk
+++ b/hw/bsp/lpc15/family.mk
@@ -12,6 +12,8 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_LPC15XX \
   -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))'
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=unused-variable -Wno-error=cast-qual
 
diff --git a/hw/bsp/lpc17/family.mk b/hw/bsp/lpc17/family.mk
index 44b406d90..67d5e14b5 100644
--- a/hw/bsp/lpc17/family.mk
+++ b/hw/bsp/lpc17/family.mk
@@ -18,7 +18,7 @@ CFLAGS += -Wno-error=strict-prototypes -Wno-error=cast-qual
 # caused by freeRTOS port !!
 CFLAGS += -Wno-error=maybe-uninitialized
 
-MCU_DIR = hw/mcu/nxp/lpcopen/lpc175x_6x/lpc_chip_175x_6x
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 SRC_C += \
 	src/portable/nxp/lpc17_40/dcd_lpc17_40.c \
diff --git a/hw/bsp/lpc18/family.mk b/hw/bsp/lpc18/family.mk
index 9d0f85c20..c36c903ae 100644
--- a/hw/bsp/lpc18/family.mk
+++ b/hw/bsp/lpc18/family.mk
@@ -1,4 +1,5 @@
 DEPS_SUBMODULES += hw/mcu/nxp/lpcopen
+MCU_DIR = hw/mcu/nxp/lpcopen/lpc18xx/lpc_chip_18xx
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 CPU_CORE ?= cortex-m3
@@ -13,7 +14,7 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter -Wno-error=strict-prototypes -Wno-error=cast-qual
 
-MCU_DIR = hw/mcu/nxp/lpcopen/lpc18xx/lpc_chip_18xx
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 SRC_C += \
 	src/portable/chipidea/ci_hs/dcd_ci_hs.c \
diff --git a/hw/bsp/lpc40/family.mk b/hw/bsp/lpc40/family.mk
index c11325890..fa76789e3 100644
--- a/hw/bsp/lpc40/family.mk
+++ b/hw/bsp/lpc40/family.mk
@@ -15,6 +15,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=cast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 SRC_C += \
 	src/portable/nxp/lpc17_40/dcd_lpc17_40.c \
diff --git a/hw/bsp/lpc43/family.mk b/hw/bsp/lpc43/family.mk
index 55d86e955..f24385139 100644
--- a/hw/bsp/lpc43/family.mk
+++ b/hw/bsp/lpc43/family.mk
@@ -18,6 +18,8 @@ CFLAGS += \
   -Wno-error=cast-qual \
   -Wno-error=incompatible-pointer-types \
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/chipidea/ci_hs/dcd_ci_hs.c \
 	src/portable/chipidea/ci_hs/hcd_ci_hs.c \
diff --git a/hw/bsp/lpc51/family.mk b/hw/bsp/lpc51/family.mk
index df5a9958e..c8ee29dbc 100644
--- a/hw/bsp/lpc51/family.mk
+++ b/hw/bsp/lpc51/family.mk
@@ -13,6 +13,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = $(MCU_DIR)/gcc/$(MCU)_flash.ld
 
diff --git a/hw/bsp/lpc54/family.mk b/hw/bsp/lpc54/family.mk
index 46a5f7930..9b5eac18d 100644
--- a/hw/bsp/lpc54/family.mk
+++ b/hw/bsp/lpc54/family.mk
@@ -3,6 +3,7 @@ DEPS_SUBMODULES += $(SDK_DIR) lib/CMSIS_5
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 CPU_CORE ?= cortex-m4
+MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
 
 CFLAGS += \
   -flto \
@@ -22,7 +23,7 @@ endif
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter
 
-MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 SRC_C += \
 	src/portable/nxp/lpc_ip3511/dcd_lpc_ip3511.c \
diff --git a/hw/bsp/lpc55/family.mk b/hw/bsp/lpc55/family.mk
index a87fa5acf..1b97c43e4 100644
--- a/hw/bsp/lpc55/family.mk
+++ b/hw/bsp/lpc55/family.mk
@@ -4,6 +4,7 @@ DEPS_SUBMODULES += lib/CMSIS_5 lib/sct_neopixel $(SDK_DIR)
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 CPU_CORE ?= cortex-m33
+MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
 
 # Default to Highspeed PORT1
 PORT ?= 1
@@ -27,7 +28,7 @@ endif
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter -Wno-error=float-equal
 
-MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE ?= $(MCU_DIR)/gcc/$(MCU_CORE)_flash.ld
diff --git a/hw/bsp/mcx/family.mk b/hw/bsp/mcx/family.mk
index e384aa8eb..526effdfb 100644
--- a/hw/bsp/mcx/family.mk
+++ b/hw/bsp/mcx/family.mk
@@ -17,6 +17,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter -Wno-error=old-style-declaration
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE ?= $(SDK_DIR)/devices/$(MCU_VARIANT)/gcc/$(MCU_CORE)_flash.ld
 
diff --git a/hw/bsp/mm32/family.mk b/hw/bsp/mm32/family.mk
index d5b6e315a..3981e4e41 100644
--- a/hw/bsp/mm32/family.mk
+++ b/hw/bsp/mm32/family.mk
@@ -13,6 +13,8 @@ CFLAGS += \
 # suppress warning caused by vendor mcu driver
 CFLAGS += -Wno-error=unused-parameter -Wno-error=maybe-uninitialized -Wno-error=cast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/mindmotion/mm32/dcd_mm32f327x_otg.c \
 	$(SDK_DIR)/mm32f327x/MM32F327x/Source/system_mm32f327x.c \
diff --git a/hw/bsp/msp432e4/family.mk b/hw/bsp/msp432e4/family.mk
index b5ade6a52..6fcb22457 100644
--- a/hw/bsp/msp432e4/family.mk
+++ b/hw/bsp/msp432e4/family.mk
@@ -12,6 +12,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=cast-qual -Wno-error=format=
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/mcu/ti/msp432e4/Source/msp432e401y.ld
 LDINC += $(TOP)/hw/mcu/ti/msp432e4/Include
diff --git a/hw/bsp/ngx4330/board.mk b/hw/bsp/ngx4330/board.mk
deleted file mode 100644
index 99c1f194c..000000000
--- a/hw/bsp/ngx4330/board.mk
+++ /dev/null
@@ -1,47 +0,0 @@
-DEPS_SUBMODULES += hw/mcu/nxp/lpcopen
-
-CFLAGS += \
-  -flto \
-  -mthumb \
-  -mabi=aapcs \
-  -mcpu=cortex-m4 \
-  -mfloat-abi=hard \
-  -mfpu=fpv4-sp-d16 \
-  -nostdlib \
-  -DCORE_M4 \
-  -D__USE_LPCOPEN \
-  -DCFG_TUSB_MCU=OPT_MCU_LPC43XX
-
-# mcu driver cause following warnings
-CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=cast-qual
-
-MCU_DIR = hw/mcu/nxp/lpcopen/lpc43xx/lpc_chip_43xx
-
-# All source paths should be relative to the top level.
-LD_FILE = hw/bsp/$(BOARD)/ngx4330.ld
-
-SRC_C += \
-	src/portable/chipidea/ci_hs/dcd_ci_hs.c \
-	src/portable/chipidea/ci_hs/hcd_ci_hs.c \
-	src/portable/ehci/ehci.c \
-	$(MCU_DIR)/../gcc/cr_startup_lpc43xx.c \
-	$(MCU_DIR)/src/chip_18xx_43xx.c \
-	$(MCU_DIR)/src/clock_18xx_43xx.c \
-	$(MCU_DIR)/src/gpio_18xx_43xx.c \
-	$(MCU_DIR)/src/sysinit_18xx_43xx.c \
-	$(MCU_DIR)/src/uart_18xx_43xx.c \
-	$(MCU_DIR)/src/fpu_init.c
-
-INC += \
-	$(TOP)/$(MCU_DIR)/inc \
-	$(TOP)/$(MCU_DIR)/inc/config_43xx
-
-# For freeRTOS port source
-FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/ARM_CM4F
-
-# For flash-jlink target
-JLINK_DEVICE = LPC4330
-JLINK_IF = swd
-
-# flash using jlink
-flash: flash-jlink
diff --git a/hw/bsp/ngx4330/ngx4330.c b/hw/bsp/ngx4330/ngx4330.c
deleted file mode 100644
index bd84e449b..000000000
--- a/hw/bsp/ngx4330/ngx4330.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 Ha Thach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * This file is part of the TinyUSB stack.
- */
-
-#include "chip.h"
-#include "../board_api.h"
-
-#define LED_PORT              1
-#define LED_PIN               12
-#define LED_STATE_ON          0
-
-#define BUTTON_PORT           0
-#define BUTTON_PIN            7
-#define BUTTON_STATE_ACTIVE   0
-
-#define BOARD_UART_PORT           LPC_USART0
-#define BOARD_UART_PIN_PORT       0x0f
-#define BOARD_UART_PIN_TX         10 // PF.10 : UART0_TXD
-#define BOARD_UART_PIN_RX         11 // PF.11 : UART0_RXD
-
-#ifdef BOARD_TUD_RHPORT
-  #define PORT_SUPPORT_DEVICE(_n)  (BOARD_TUD_RHPORT == _n)
-#else
-  #define PORT_SUPPORT_DEVICE(_n)  0
-#endif
-
-#ifdef BOARD_TUH_RHPORT
-  #define PORT_SUPPORT_HOST(_n)    (BOARD_TUH_RHPORT == _n)
-#else
-  #define PORT_SUPPORT_HOST(_n)    0
-#endif
-
-/*------------------------------------------------------------------*/
-/* BOARD API
- *------------------------------------------------------------------*/
-
-/* System configuration variables used by chip driver */
-const uint32_t OscRateIn = 12000000;
-const uint32_t ExtRateIn = 0;
-
-static const PINMUX_GRP_T pinmuxing[] =
-{
-  // LED P2.12 as GPIO 1.12
-  {2, 11, (SCU_MODE_INBUFF_EN | SCU_MODE_PULLDOWN | SCU_MODE_FUNC0)},
-
-  // Button P2.7 as GPIO 0.7
-  {2, 7,  (SCU_MODE_PULLUP | SCU_MODE_INBUFF_EN | SCU_MODE_ZIF_DIS | SCU_MODE_FUNC0)},
-
-  // USB
-  {2, 6, (SCU_MODE_PULLUP | SCU_MODE_INBUFF_EN | SCU_MODE_FUNC4)}, // USB1_PWR_EN
-  {2, 5, (SCU_MODE_INACT | SCU_MODE_INBUFF_EN | SCU_MODE_ZIF_DIS | SCU_MODE_FUNC2)}, // USB1_VBUS
-  {1, 7, (SCU_MODE_PULLUP | SCU_MODE_INBUFF_EN | SCU_MODE_FUNC4)}, // USB0_PWRN_EN
-
-  // SPIFI
-	{3, 3,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)},	/* SPIFI CLK */
-	{3, 4,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)},	/* SPIFI D3 */
-	{3, 5,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)},	/* SPIFI D2 */
-	{3, 6,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)},	/* SPIFI D1 */
-	{3, 7,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)},	/* SPIFI D0 */
-	{3, 8,  (SCU_PINIO_FAST | SCU_MODE_FUNC3)}	/* SPIFI CS/SSEL */
-};
-
-// Invoked by startup code
-void SystemInit(void)
-{
-#ifdef __USE_LPCOPEN
-	extern void (* const g_pfnVectors[])(void);
-  unsigned int *pSCB_VTOR = (unsigned int *) 0xE000ED08;
-	*pSCB_VTOR = (unsigned int) g_pfnVectors;
-
-#if __FPU_USED == 1
-	fpuInit();
-#endif
-#endif // __USE_LPCOPEN
-
-	// Set up pinmux
-	Chip_SCU_SetPinMuxing(pinmuxing, sizeof(pinmuxing) / sizeof(PINMUX_GRP_T));
-
-	//------------- Set up clock -------------//
-	Chip_Clock_SetBaseClock(CLK_BASE_SPIFI, CLKIN_IRC, true, false);	// change SPIFI to IRC during clock programming
-	LPC_SPIFI->CTRL |= SPIFI_CTRL_FBCLK(1);								            // and set FBCLK in SPIFI controller
-
-	Chip_SetupCoreClock(CLKIN_CRYSTAL, MAX_CLOCK_FREQ, true);
-
-	/* Reset and enable 32Khz oscillator */
-	LPC_CREG->CREG0 &= ~((1 << 3) | (1 << 2));
-	LPC_CREG->CREG0 |= (1 << 1) | (1 << 0);
-
-	/* Setup a divider E for main PLL clock switch SPIFI clock to that divider.
-	   Divide rate is based on CPU speed and speed of SPI FLASH part. */
-#if (MAX_CLOCK_FREQ > 180000000)
-	Chip_Clock_SetDivider(CLK_IDIV_E, CLKIN_MAINPLL, 5);
-#else
-	Chip_Clock_SetDivider(CLK_IDIV_E, CLKIN_MAINPLL, 4);
-#endif
-	Chip_Clock_SetBaseClock(CLK_BASE_SPIFI, CLKIN_IDIVE, true, false);
-
-	/* Setup system base clocks and initial states. This won't enable and
-	   disable individual clocks, but sets up the base clock sources for
-	   each individual peripheral clock. */
-	Chip_Clock_SetBaseClock(CLK_BASE_USB1, CLKIN_IDIVD, true, true);
-}
-
-void board_init(void)
-{
-  SystemCoreClockUpdate();
-
-#if CFG_TUSB_OS == OPT_OS_NONE
-  // 1ms tick timer
-  SysTick_Config(SystemCoreClock / 1000);
-#elif CFG_TUSB_OS == OPT_OS_FREERTOS
-  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
-  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY);
-#endif
-
-  Chip_GPIO_Init(LPC_GPIO_PORT);
-
-  // LED
-  Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, LED_PORT, LED_PIN);
-
-  // Button
-  Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, BUTTON_PORT, BUTTON_PIN);
-
-#if 0
-  //------------- UART -------------//
-  scu_pinmux(BOARD_UART_PIN_PORT, BOARD_UART_PIN_TX, MD_PDN, FUNC1);
-  scu_pinmux(BOARD_UART_PIN_PORT, BOARD_UART_PIN_RX, MD_PLN | MD_EZI | MD_ZI, FUNC1);
-
-  UART_CFG_Type UARTConfigStruct;
-  UART_ConfigStructInit(&UARTConfigStruct);
-  UARTConfigStruct.Baud_rate   = CFG_BOARD_UART_BAUDRATE;
-  UARTConfigStruct.Clock_Speed = 0;
-
-  UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
-  UART_TxCmd(BOARD_UART_PORT, ENABLE); // Enable UART Transmit
-#endif
-
-  //------------- USB -------------//
-  enum {
-    USBMODE_DEVICE = 2,
-    USBMODE_HOST   = 3
-  };
-
-  enum {
-    USBMODE_VBUS_LOW  = 0,
-    USBMODE_VBUS_HIGH = 1
-  };
-
-  /* USB0
-   * For USB Device operation; insert jumpers in position 1-2 in JP17/JP18/JP19. GPIO28 controls USB
-   * connect functionality and LED32 lights when the USB Device is connected. SJ4 has pads 1-2 shorted
-   * by default. LED33 is controlled by GPIO27 and signals USB-up state. GPIO54 is used for VBUS
-   * sensing.
-   * For USB Host operation; insert jumpers in position 2-3 in JP17/JP18/JP19. USB Host power is
-   * controlled via distribution switch U20 (found in schematic page 11). Signal GPIO26 is active low and
-   * enables +5V on VBUS2. LED35 light whenever +5V is present on VBUS2. GPIO55 is connected to
-   * status feedback from the distribution switch. GPIO54 is used for VBUS sensing. 15Kohm pull-down
-   * resistors are always active
-   */
-  Chip_USB0_Init();
-
-  /* USB1
-   * When USB channel #1 is used as USB Host, 15Kohm pull-down resistors are needed on the USB data
-   * signals. These are activated inside the USB OTG chip (U31), and this has to be done via the I2C
-   * interface of GPIO52/GPIO53.
-   * J20 is the connector to use when USB Host is used. In order to provide +5V to the external USB
-   * device connected to this connector (J20), channel A of U20 must be enabled. It is enabled by default
-   * since SJ5 is normally connected between pin 1-2. LED34 lights green when +5V is available on J20.
-   * JP15 shall not be inserted. JP16 has no effect
-   *
-   * When USB channel #1 is used as USB Device, a 1.5Kohm pull-up resistor is needed on the USB DP
-   * data signal. There are two methods to create this. JP15 is inserted and the pull-up resistor is always
-   * enabled. Alternatively, the pull-up resistor is activated inside the USB OTG chip (U31), and this has to
-   * be done via the I2C interface of GPIO52/GPIO53. In the latter case, JP15 shall not be inserted.
-   * J19 is the connector to use when USB Device is used. Normally it should be a USB-B connector for
-   * creating a USB Device interface, but the mini-AB connector can also be used in this case. The status
-   * of VBUS can be read via U31.
-   * JP16 shall not be inserted.
-   */
-  Chip_USB1_Init();
-//	Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, 5, 6);							/* GPIO5[6] = USB1_PWR_EN */
-//	Chip_GPIO_SetPinState(LPC_GPIO_PORT, 5, 6, true);							/* GPIO5[6] output high */
-}
-
-//--------------------------------------------------------------------+
-// USB Interrupt Handler
-//--------------------------------------------------------------------+
-void USB0_IRQHandler(void)
-{
-  #if PORT_SUPPORT_DEVICE(0)
-    tud_int_handler(0);
-  #endif
-
-  #if PORT_SUPPORT_HOST(0)
-    tuh_int_handler(0, true);
-  #endif
-}
-
-void USB1_IRQHandler(void)
-{
-  #if PORT_SUPPORT_DEVICE(1)
-    tud_int_handler(1);
-  #endif
-
-  #if PORT_SUPPORT_HOST(1)
-    tuh_int_handler(1, true);
-  #endif
-}
-
-//--------------------------------------------------------------------+
-// Board porting API
-//--------------------------------------------------------------------+
-
-void board_led_write(bool state)
-{
-  Chip_GPIO_SetPinState(LPC_GPIO_PORT, LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
-}
-
-uint32_t board_button_read(void)
-{
-  return BUTTON_STATE_ACTIVE == Chip_GPIO_GetPinState(LPC_GPIO_PORT, BUTTON_PORT, BUTTON_PIN);
-}
-
-int board_uart_read(uint8_t* buf, int len)
-{
-  //return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf; (void) len;
-  return 0;
-}
-
-int board_uart_write(void const * buf, int len)
-{
-  //UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf; (void) len;
-  return 0;
-}
-
-#if CFG_TUSB_OS == OPT_OS_NONE
-volatile uint32_t system_ticks = 0;
-void SysTick_Handler (void)
-{
-  system_ticks++;
-}
-
-uint32_t board_millis(void)
-{
-  return system_ticks;
-}
-#endif
diff --git a/hw/bsp/ngx4330/ngx4330.ld b/hw/bsp/ngx4330/ngx4330.ld
deleted file mode 100644
index 300869c20..000000000
--- a/hw/bsp/ngx4330/ngx4330.ld
+++ /dev/null
@@ -1,343 +0,0 @@
-/*
- * GENERATED FILE - DO NOT EDIT
- * Copyright (c) 2008-2013 Code Red Technologies Ltd,
- * Copyright 2015, 2018-2019 NXP
- * (c) NXP Semiconductors 2013-2019
- * Generated linker script file for LPC4330
- * Created from linkscript.ldt by FMCreateLinkLibraries
- * Using Freemarker v2.3.23
- * MCUXpresso IDE v11.0.0 [Build 2516] [2019-06-05] on Sep 9, 2019 12:09:49 PM
- */
-
-MEMORY
-{
-  /* Define each memory region */
-  RamLoc128 (rwx) : ORIGIN = 0x10000000, LENGTH = 0x20000 /* 128K bytes (alias RAM) */
-  RamLoc72 (rwx) : ORIGIN = 0x10080000, LENGTH = 0x12000 /* 72K bytes (alias RAM2) */
-  RamAHB32 (rwx) : ORIGIN = 0x20000000, LENGTH = 0x8000 /* 32K bytes (alias RAM3) */
-  RamAHB16 (rwx) : ORIGIN = 0x20008000, LENGTH = 0x4000 /* 16K bytes (alias RAM4) */
-  RamAHB_ETB16 (rwx) : ORIGIN = 0x2000c000, LENGTH = 0x4000 /* 16K bytes (alias RAM5) */
-  SPIFI (rx) : ORIGIN = 0x14000000, LENGTH = 0x400000 /* 4M bytes (alias Flash) */
-}
-
-  /* Define a symbol for the top of each memory region */
-  __base_RamLoc128 = 0x10000000  ; /* RamLoc128 */
-  __base_RAM = 0x10000000 ; /* RAM */
-  __top_RamLoc128 = 0x10000000 + 0x20000 ; /* 128K bytes */
-  __top_RAM = 0x10000000 + 0x20000 ; /* 128K bytes */
-  __base_RamLoc72 = 0x10080000  ; /* RamLoc72 */
-  __base_RAM2 = 0x10080000 ; /* RAM2 */
-  __top_RamLoc72 = 0x10080000 + 0x12000 ; /* 72K bytes */
-  __top_RAM2 = 0x10080000 + 0x12000 ; /* 72K bytes */
-  __base_RamAHB32 = 0x20000000  ; /* RamAHB32 */
-  __base_RAM3 = 0x20000000 ; /* RAM3 */
-  __top_RamAHB32 = 0x20000000 + 0x8000 ; /* 32K bytes */
-  __top_RAM3 = 0x20000000 + 0x8000 ; /* 32K bytes */
-  __base_RamAHB16 = 0x20008000  ; /* RamAHB16 */
-  __base_RAM4 = 0x20008000 ; /* RAM4 */
-  __top_RamAHB16 = 0x20008000 + 0x4000 ; /* 16K bytes */
-  __top_RAM4 = 0x20008000 + 0x4000 ; /* 16K bytes */
-  __base_RamAHB_ETB16 = 0x2000c000  ; /* RamAHB_ETB16 */
-  __base_RAM5 = 0x2000c000 ; /* RAM5 */
-  __top_RamAHB_ETB16 = 0x2000c000 + 0x4000 ; /* 16K bytes */
-  __top_RAM5 = 0x2000c000 + 0x4000 ; /* 16K bytes */
-  __base_SPIFI = 0x14000000  ; /* SPIFI */
-  __base_Flash = 0x14000000 ; /* Flash */
-  __top_SPIFI = 0x14000000 + 0x400000 ; /* 4M bytes */
-  __top_Flash = 0x14000000 + 0x400000 ; /* 4M bytes */
-
-ENTRY(ResetISR)
-
-SECTIONS
-{
-     /* MAIN TEXT SECTION */
-    .text : ALIGN(4)
-    {
-        FILL(0xff)
-        __vectors_start__ = ABSOLUTE(.) ;
-        KEEP(*(.isr_vector))
-        /* Global Section Table */
-        . = ALIGN(4) ;
-        __section_table_start = .;
-        __data_section_table = .;
-        LONG(LOADADDR(.data));
-        LONG(    ADDR(.data));
-        LONG(  SIZEOF(.data));
-        LONG(LOADADDR(.data_RAM2));
-        LONG(    ADDR(.data_RAM2));
-        LONG(  SIZEOF(.data_RAM2));
-        LONG(LOADADDR(.data_RAM3));
-        LONG(    ADDR(.data_RAM3));
-        LONG(  SIZEOF(.data_RAM3));
-        LONG(LOADADDR(.data_RAM4));
-        LONG(    ADDR(.data_RAM4));
-        LONG(  SIZEOF(.data_RAM4));
-        LONG(LOADADDR(.data_RAM5));
-        LONG(    ADDR(.data_RAM5));
-        LONG(  SIZEOF(.data_RAM5));
-        __data_section_table_end = .;
-        __bss_section_table = .;
-        LONG(    ADDR(.bss));
-        LONG(  SIZEOF(.bss));
-        LONG(    ADDR(.bss_RAM2));
-        LONG(  SIZEOF(.bss_RAM2));
-        LONG(    ADDR(.bss_RAM3));
-        LONG(  SIZEOF(.bss_RAM3));
-        LONG(    ADDR(.bss_RAM4));
-        LONG(  SIZEOF(.bss_RAM4));
-        LONG(    ADDR(.bss_RAM5));
-        LONG(  SIZEOF(.bss_RAM5));
-        __bss_section_table_end = .;
-        __section_table_end = . ;
-        /* End of Global Section Table */
-
-        *(.after_vectors*)
-
-    } > SPIFI
-
-    .text : ALIGN(4)
-    {
-       *(.text*)
-       *(.rodata .rodata.* .constdata .constdata.*)
-       . = ALIGN(4);
-    } > SPIFI
-    /*
-     * for exception handling/unwind - some Newlib functions (in common
-     * with C++ and STDC++) use this.
-     */
-    .ARM.extab : ALIGN(4)
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > SPIFI
-
-    __exidx_start = .;
-
-    .ARM.exidx : ALIGN(4)
-    {
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-    } > SPIFI
-    __exidx_end = .;
-
-    _etext = .;
-
-    /* DATA section for RamLoc72 */
-
-    .data_RAM2 : ALIGN(4)
-    {
-        FILL(0xff)
-        PROVIDE(__start_data_RAM2 = .) ;
-        *(.ramfunc.$RAM2)
-        *(.ramfunc.$RamLoc72)
-        *(.data.$RAM2)
-        *(.data.$RamLoc72)
-        *(.data.$RAM2.*)
-        *(.data.$RamLoc72.*)
-        . = ALIGN(4) ;
-        PROVIDE(__end_data_RAM2 = .) ;
-     } > RamLoc72 AT>SPIFI
-    /* DATA section for RamAHB32 */
-
-    .data_RAM3 : ALIGN(4)
-    {
-        FILL(0xff)
-        PROVIDE(__start_data_RAM3 = .) ;
-        *(.ramfunc.$RAM3)
-        *(.ramfunc.$RamAHB32)
-        *(.data.$RAM3)
-        *(.data.$RamAHB32)
-        *(.data.$RAM3.*)
-        *(.data.$RamAHB32.*)
-        . = ALIGN(4) ;
-        PROVIDE(__end_data_RAM3 = .) ;
-     } > RamAHB32 AT>SPIFI
-    /* DATA section for RamAHB16 */
-
-    .data_RAM4 : ALIGN(4)
-    {
-        FILL(0xff)
-        PROVIDE(__start_data_RAM4 = .) ;
-        *(.ramfunc.$RAM4)
-        *(.ramfunc.$RamAHB16)
-        *(.data.$RAM4)
-        *(.data.$RamAHB16)
-        *(.data.$RAM4.*)
-        *(.data.$RamAHB16.*)
-        . = ALIGN(4) ;
-        PROVIDE(__end_data_RAM4 = .) ;
-     } > RamAHB16 AT>SPIFI
-    /* DATA section for RamAHB_ETB16 */
-
-    .data_RAM5 : ALIGN(4)
-    {
-        FILL(0xff)
-        PROVIDE(__start_data_RAM5 = .) ;
-        *(.ramfunc.$RAM5)
-        *(.ramfunc.$RamAHB_ETB16)
-        *(.data.$RAM5)
-        *(.data.$RamAHB_ETB16)
-        *(.data.$RAM5.*)
-        *(.data.$RamAHB_ETB16.*)
-        . = ALIGN(4) ;
-        PROVIDE(__end_data_RAM5 = .) ;
-     } > RamAHB_ETB16 AT>SPIFI
-    /* MAIN DATA SECTION */
-    .uninit_RESERVED (NOLOAD) :
-    {
-        . = ALIGN(4) ;
-        KEEP(*(.bss.$RESERVED*))
-       . = ALIGN(4) ;
-        _end_uninit_RESERVED = .;
-    } > RamLoc128
-
-    /* Main DATA section (RamLoc128) */
-    .data : ALIGN(4)
-    {
-       FILL(0xff)
-       _data = . ;
-       *(vtable)
-       *(.ramfunc*)
-       *(.data*)
-       . = ALIGN(4) ;
-       _edata = . ;
-    } > RamLoc128 AT>SPIFI
-
-    /* BSS section for RamLoc72 */
-    .bss_RAM2 :
-    {
-       . = ALIGN(4) ;
-       PROVIDE(__start_bss_RAM2 = .) ;
-       *(.bss.$RAM2)
-       *(.bss.$RamLoc72)
-       *(.bss.$RAM2.*)
-       *(.bss.$RamLoc72.*)
-       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
-       PROVIDE(__end_bss_RAM2 = .) ;
-    } > RamLoc72
-
-    /* BSS section for RamAHB32 */
-    .bss_RAM3 :
-    {
-       . = ALIGN(4) ;
-       PROVIDE(__start_bss_RAM3 = .) ;
-       *(.bss.$RAM3)
-       *(.bss.$RamAHB32)
-       *(.bss.$RAM3.*)
-       *(.bss.$RamAHB32.*)
-       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
-       PROVIDE(__end_bss_RAM3 = .) ;
-    } > RamAHB32
-
-    /* BSS section for RamAHB16 */
-    .bss_RAM4 :
-    {
-       . = ALIGN(4) ;
-       PROVIDE(__start_bss_RAM4 = .) ;
-       *(.bss.$RAM4)
-       *(.bss.$RamAHB16)
-       *(.bss.$RAM4.*)
-       *(.bss.$RamAHB16.*)
-       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
-       PROVIDE(__end_bss_RAM4 = .) ;
-    } > RamAHB16
-
-    /* BSS section for RamAHB_ETB16 */
-    .bss_RAM5 :
-    {
-       . = ALIGN(4) ;
-       PROVIDE(__start_bss_RAM5 = .) ;
-       *(.bss.$RAM5)
-       *(.bss.$RamAHB_ETB16)
-       *(.bss.$RAM5.*)
-       *(.bss.$RamAHB_ETB16.*)
-       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
-       PROVIDE(__end_bss_RAM5 = .) ;
-    } > RamAHB_ETB16
-
-    /* MAIN BSS SECTION */
-    .bss :
-    {
-        . = ALIGN(4) ;
-        _bss = .;
-        *(.bss*)
-        *(COMMON)
-        . = ALIGN(4) ;
-        _ebss = .;
-        PROVIDE(end = .);
-    } > RamLoc128
-
-    /* NOINIT section for RamLoc72 */
-    .noinit_RAM2 (NOLOAD) :
-    {
-       . = ALIGN(4) ;
-       *(.noinit.$RAM2)
-       *(.noinit.$RamLoc72)
-       *(.noinit.$RAM2.*)
-       *(.noinit.$RamLoc72.*)
-       . = ALIGN(4) ;
-    } > RamLoc72
-
-    /* NOINIT section for RamAHB32 */
-    .noinit_RAM3 (NOLOAD) :
-    {
-       . = ALIGN(4) ;
-       *(.noinit.$RAM3)
-       *(.noinit.$RamAHB32)
-       *(.noinit.$RAM3.*)
-       *(.noinit.$RamAHB32.*)
-       . = ALIGN(4) ;
-    } > RamAHB32
-
-    /* NOINIT section for RamAHB16 */
-    .noinit_RAM4 (NOLOAD) :
-    {
-       . = ALIGN(4) ;
-       *(.noinit.$RAM4)
-       *(.noinit.$RamAHB16)
-       *(.noinit.$RAM4.*)
-       *(.noinit.$RamAHB16.*)
-       . = ALIGN(4) ;
-    } > RamAHB16
-
-    /* NOINIT section for RamAHB_ETB16 */
-    .noinit_RAM5 (NOLOAD) :
-    {
-       . = ALIGN(4) ;
-       *(.noinit.$RAM5)
-       *(.noinit.$RamAHB_ETB16)
-       *(.noinit.$RAM5.*)
-       *(.noinit.$RamAHB_ETB16.*)
-       . = ALIGN(4) ;
-    } > RamAHB_ETB16
-
-    /* DEFAULT NOINIT SECTION */
-    .noinit (NOLOAD):
-    {
-         . = ALIGN(4) ;
-        _noinit = .;
-        *(.noinit*)
-         . = ALIGN(4) ;
-        _end_noinit = .;
-    } > RamLoc128
-    PROVIDE(_pvHeapStart = DEFINED(__user_heap_base) ? __user_heap_base : .);
-    PROVIDE(_vStackTop = DEFINED(__user_stack_top) ? __user_stack_top : __top_RamLoc128 - 0);
-
-    /* ## Create checksum value (used in startup) ## */
-    PROVIDE(__valid_user_code_checksum = 0 -
-                                         (_vStackTop
-                                         + (ResetISR + 1)
-                                         + (NMI_Handler + 1)
-                                         + (HardFault_Handler + 1)
-                                         + (( DEFINED(MemManage_Handler) ? MemManage_Handler : 0 ) + 1)   /* MemManage_Handler may not be defined */
-                                         + (( DEFINED(BusFault_Handler) ? BusFault_Handler : 0 ) + 1)     /* BusFault_Handler may not be defined */
-                                         + (( DEFINED(UsageFault_Handler) ? UsageFault_Handler : 0 ) + 1) /* UsageFault_Handler may not be defined */
-                                         ) );
-
-    /* Provide basic symbols giving location and size of main text
-     * block, including initial values of RW data sections. Note that
-     * these will need extending to give a complete picture with
-     * complex images (e.g multiple Flash banks).
-     */
-    _image_start = LOADADDR(.text);
-    _image_end = LOADADDR(.data) + SIZEOF(.data);
-    _image_size = _image_end - _image_start;
-}
diff --git a/hw/bsp/nrf/family.mk b/hw/bsp/nrf/family.mk
index 4b53b9a4f..df22477df 100644
--- a/hw/bsp/nrf/family.mk
+++ b/hw/bsp/nrf/family.mk
@@ -13,9 +13,16 @@ CFLAGS += \
   -DCONFIG_GPIO_AS_PINRESET
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=undef -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += \
+  -Wno-error=undef \
+  -Wno-error=unused-parameter \
+  -Wno-error=cast-align \
+  -Wno-error=cast-qual \
+  -Wno-error=redundant-decls
 
-LDFLAGS += -L$(TOP)/${NRFX_DIR}/mdk
+LDFLAGS += \
+  -specs=nosys.specs -specs=nano.specs \
+  -L$(TOP)/${NRFX_DIR}/mdk
 
 SRC_C += \
   src/portable/nordic/nrf5x/dcd_nrf5x.c \
diff --git a/hw/bsp/nutiny_nuc121s/board.mk b/hw/bsp/nutiny_nuc121s/board.mk
index aa8f00e70..161ff9041 100644
--- a/hw/bsp/nutiny_nuc121s/board.mk
+++ b/hw/bsp/nutiny_nuc121s/board.mk
@@ -13,6 +13,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/nuc121_flash.ld
 
diff --git a/hw/bsp/nutiny_nuc125s/board.mk b/hw/bsp/nutiny_nuc125s/board.mk
index bf7610a7b..081764fd3 100644
--- a/hw/bsp/nutiny_nuc125s/board.mk
+++ b/hw/bsp/nutiny_nuc125s/board.mk
@@ -13,6 +13,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/nuc125_flash.ld
 
diff --git a/hw/bsp/nutiny_nuc126v/board.mk b/hw/bsp/nutiny_nuc126v/board.mk
index 46f53420c..2466b3a31 100644
--- a/hw/bsp/nutiny_nuc126v/board.mk
+++ b/hw/bsp/nutiny_nuc126v/board.mk
@@ -14,6 +14,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/nuc126_flash.ld
 
diff --git a/hw/bsp/nutiny_sdk_nuc120/board.mk b/hw/bsp/nutiny_sdk_nuc120/board.mk
index b1f9245a6..b54895b58 100644
--- a/hw/bsp/nutiny_sdk_nuc120/board.mk
+++ b/hw/bsp/nutiny_sdk_nuc120/board.mk
@@ -9,6 +9,8 @@ CFLAGS += \
   -DCFG_EXAMPLE_VIDEO_READONLY \
   -DCFG_TUSB_MCU=OPT_MCU_NUC120
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/nutiny_sdk_nuc120/nuc120_flash.ld
 
diff --git a/hw/bsp/nutiny_sdk_nuc505/board.mk b/hw/bsp/nutiny_sdk_nuc505/board.mk
index 3e48d3998..f3b389354 100644
--- a/hw/bsp/nutiny_sdk_nuc505/board.mk
+++ b/hw/bsp/nutiny_sdk_nuc505/board.mk
@@ -12,6 +12,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/nuc505_flashtoram.ld
 
diff --git a/hw/bsp/ra/family.mk b/hw/bsp/ra/family.mk
index 9afb38e06..4447e8499 100644
--- a/hw/bsp/ra/family.mk
+++ b/hw/bsp/ra/family.mk
@@ -31,6 +31,8 @@ else
   $(info "Using PORT 0 FullSpeed")
 endif
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/renesas/rusb2/dcd_rusb2.c \
 	src/portable/renesas/rusb2/hcd_rusb2.c \
diff --git a/hw/bsp/rx/family.mk b/hw/bsp/rx/family.mk
index 3044167b9..02ea0dfa4 100644
--- a/hw/bsp/rx/family.mk
+++ b/hw/bsp/rx/family.mk
@@ -16,6 +16,8 @@ CFLAGS += \
 # suppress warning caused by vendor mcu driver
 CFLAGS += -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/renesas/rusb2/dcd_rusb2.c \
 	src/portable/renesas/rusb2/hcd_rusb2.c \
diff --git a/hw/bsp/samd11/family.mk b/hw/bsp/samd11/family.mk
index 43a60a122..38430f017 100644
--- a/hw/bsp/samd11/family.mk
+++ b/hw/bsp/samd11/family.mk
@@ -18,6 +18,8 @@ CFLAGS += -Wno-error=redundant-decls
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	hw/mcu/microchip/samd11/gcc/gcc/startup_samd11.c \
diff --git a/hw/bsp/samd21/family.mk b/hw/bsp/samd21/family.mk
index 79c63812d..3302aade5 100644
--- a/hw/bsp/samd21/family.mk
+++ b/hw/bsp/samd21/family.mk
@@ -16,6 +16,8 @@ CFLAGS += -Wno-error=redundant-decls
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	${SDK_DIR}/gcc/gcc/startup_samd21.c \
diff --git a/hw/bsp/samd51/family.mk b/hw/bsp/samd51/family.mk
index 9a6c67e1a..94ca68705 100644
--- a/hw/bsp/samd51/family.mk
+++ b/hw/bsp/samd51/family.mk
@@ -12,6 +12,8 @@ CFLAGS += \
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	hw/mcu/microchip/samd51/gcc/gcc/startup_samd51.c \
diff --git a/hw/bsp/same5x/family.mk b/hw/bsp/same5x/family.mk
index 691863f11..b2bf0d359 100644
--- a/hw/bsp/same5x/family.mk
+++ b/hw/bsp/same5x/family.mk
@@ -13,6 +13,8 @@ CFLAGS += \
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
   src/portable/microchip/samd/dcd_samd.c \
   $(SDK_DIR)/gcc/gcc/startup_$(MCU).c \
diff --git a/hw/bsp/same70_qmtech/board.mk b/hw/bsp/same70_qmtech/board.mk
index ad5af2020..281a947f3 100644
--- a/hw/bsp/same70_qmtech/board.mk
+++ b/hw/bsp/same70_qmtech/board.mk
@@ -1,4 +1,5 @@
 DEPS_SUBMODULES += hw/mcu/microchip
+ASF_DIR = hw/mcu/microchip/same70
 
 CFLAGS += \
   -mthumb \
@@ -16,7 +17,7 @@ CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=redundant
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
-ASF_DIR = hw/mcu/microchip/same70
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = $(ASF_DIR)/same70b/gcc/gcc/same70q21b_flash.ld
diff --git a/hw/bsp/same70_xplained/board.mk b/hw/bsp/same70_xplained/board.mk
index 769d03e21..3edc128a5 100644
--- a/hw/bsp/same70_xplained/board.mk
+++ b/hw/bsp/same70_xplained/board.mk
@@ -1,4 +1,5 @@
 DEPS_SUBMODULES += hw/mcu/microchip
+ASF_DIR = hw/mcu/microchip/same70
 
 CFLAGS += \
   -mthumb \
@@ -16,7 +17,7 @@ CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=redundant
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
-ASF_DIR = hw/mcu/microchip/same70
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = $(ASF_DIR)/same70b/gcc/gcc/same70q21b_flash.ld
diff --git a/hw/bsp/samg55xplained/board.mk b/hw/bsp/samg55xplained/board.mk
index ed0d59772..a9328be11 100644
--- a/hw/bsp/samg55xplained/board.mk
+++ b/hw/bsp/samg55xplained/board.mk
@@ -1,4 +1,5 @@
 DEPS_SUBMODULES += hw/mcu/microchip
+ASF_DIR = hw/mcu/microchip/samg55
 
 CFLAGS += \
   -flto \
@@ -17,7 +18,7 @@ CFLAGS += -Wno-error=undef -Wno-error=null-dereference -Wno-error=redundant-decl
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
-ASF_DIR = hw/mcu/microchip/samg55
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = hw/bsp/$(BOARD)/samg55j19_flash.ld
diff --git a/hw/bsp/saml2x/family.mk b/hw/bsp/saml2x/family.mk
index 0acb0ed14..59dbc9a25 100644
--- a/hw/bsp/saml2x/family.mk
+++ b/hw/bsp/saml2x/family.mk
@@ -16,6 +16,8 @@ CFLAGS += -Wno-error=redundant-decls
 # SAM driver is flooded with -Wcast-qual which slow down complication significantly
 CFLAGS_SKIP += -Wcast-qual
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
 	$(MCU_DIR)/gcc/gcc/startup_$(SAML_VARIANT).c \
diff --git a/hw/bsp/sltb009a/board.mk b/hw/bsp/sltb009a/board.mk
index f9c1dd4db..a04bc19d8 100644
--- a/hw/bsp/sltb009a/board.mk
+++ b/hw/bsp/sltb009a/board.mk
@@ -19,6 +19,8 @@ SILABS_CMSIS = hw/mcu/silabs/cmsis-dfp-$(SILABS_FAMILY)/Device/SiliconLabs/$(she
 DEPS_SUBMODULES += hw/mcu/silabs/cmsis-dfp-$(SILABS_FAMILY)
 DEPS_SUBMODULES += lib/CMSIS_5
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # All source paths should be relative to the top level.
 LD_FILE = $(SILABS_CMSIS)/Source/GCC/$(SILABS_FAMILY).ld
 
diff --git a/hw/bsp/spresense/board.mk b/hw/bsp/spresense/board.mk
index 78d7f6a66..15fa0ff20 100644
--- a/hw/bsp/spresense/board.mk
+++ b/hw/bsp/spresense/board.mk
@@ -38,6 +38,8 @@ CFLAGS += \
 # lwip/src/core/raw.c:334:43: error: declaration of 'recv' shadows a global declaration
 CFLAGS += -Wno-error=shadow  -Wno-error=redundant-decls
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SPRESENSE_SDK = $(TOP)/hw/mcu/sony/cxd56/spresense-exported-sdk
 
 SRC_C += src/portable/sony/cxd56/dcd_cxd56.c
diff --git a/hw/bsp/stm32f0/family.mk b/hw/bsp/stm32f0/family.mk
index 129a3b73a..537df4d7b 100644
--- a/hw/bsp/stm32f0/family.mk
+++ b/hw/bsp/stm32f0/family.mk
@@ -23,6 +23,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=unused-parameter -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # ------------------------
 # All source paths should be relative to the top level.
 # ------------------------
diff --git a/hw/bsp/stm32f1/family.mk b/hw/bsp/stm32f1/family.mk
index d3627f47a..90a984bfe 100644
--- a/hw/bsp/stm32f1/family.mk
+++ b/hw/bsp/stm32f1/family.mk
@@ -18,6 +18,8 @@ CFLAGS_GCC += \
   -flto \
   -nostdlib -nostartfiles \
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # ------------------------
 # All source paths should be relative to the top level.
 # ------------------------
diff --git a/hw/bsp/stm32f2/family.mk b/hw/bsp/stm32f2/family.mk
index ce50b16ad..c6ef1ec1d 100644
--- a/hw/bsp/stm32f2/family.mk
+++ b/hw/bsp/stm32f2/family.mk
@@ -21,6 +21,8 @@ CFLAGS_GCC += \
 # mcu driver cause following warnings
 CFLAGS_GCC += -Wno-error=sign-compare
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
   src/portable/synopsys/dwc2/dcd_dwc2.c \
   $(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
diff --git a/hw/bsp/stm32f3/family.mk b/hw/bsp/stm32f3/family.mk
index a740e9012..be8271d96 100644
--- a/hw/bsp/stm32f3/family.mk
+++ b/hw/bsp/stm32f3/family.mk
@@ -19,6 +19,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
   src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c \
   $(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
diff --git a/hw/bsp/stm32f4/family.mk b/hw/bsp/stm32f4/family.mk
index 0f4c792ab..ecbbff417 100644
--- a/hw/bsp/stm32f4/family.mk
+++ b/hw/bsp/stm32f4/family.mk
@@ -25,6 +25,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32f7/family.mk b/hw/bsp/stm32f7/family.mk
index 7f37a7e40..1cdf23c6b 100644
--- a/hw/bsp/stm32f7/family.mk
+++ b/hw/bsp/stm32f7/family.mk
@@ -35,6 +35,8 @@ CFLAGS_GCC += \
 # mcu driver cause following warnings
 CFLAGS_GCC += -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32g0/family.mk b/hw/bsp/stm32g0/family.mk
index 6b199f21a..fb382b56a 100644
--- a/hw/bsp/stm32g0/family.mk
+++ b/hw/bsp/stm32g0/family.mk
@@ -21,6 +21,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32g4/family.mk b/hw/bsp/stm32g4/family.mk
index 2efe91449..4b0c6922d 100644
--- a/hw/bsp/stm32g4/family.mk
+++ b/hw/bsp/stm32g4/family.mk
@@ -22,6 +22,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32h7/family.mk b/hw/bsp/stm32h7/family.mk
index a1ff26d0b..0777bb9c2 100644
--- a/hw/bsp/stm32h7/family.mk
+++ b/hw/bsp/stm32h7/family.mk
@@ -35,6 +35,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=maybe-uninitialized -Wno-error=cast-align -Wno-error=unused-parameter
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32l0/family.mk b/hw/bsp/stm32l0/family.mk
index 43f567b50..a811e1823 100644
--- a/hw/bsp/stm32l0/family.mk
+++ b/hw/bsp/stm32l0/family.mk
@@ -24,6 +24,8 @@ CFLAGS += \
 	-Wno-error=cast-align \
 	-Wno-error=maybe-uninitialized
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
   src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c \
   $(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
diff --git a/hw/bsp/stm32l4/family.mk b/hw/bsp/stm32l4/family.mk
index c16040887..956f82263 100644
--- a/hw/bsp/stm32l4/family.mk
+++ b/hw/bsp/stm32l4/family.mk
@@ -21,6 +21,8 @@ CFLAGS_GCC += \
 # suppress warning caused by vendor mcu driver
 CFLAGS_GCC += -Wno-error=maybe-uninitialized -Wno-error=cast-align
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 # -----------------
 # Sources & Include
 # -----------------
diff --git a/hw/bsp/stm32u5/family.mk b/hw/bsp/stm32u5/family.mk
index c3e66c5a5..2144ef37b 100644
--- a/hw/bsp/stm32u5/family.mk
+++ b/hw/bsp/stm32u5/family.mk
@@ -15,6 +15,8 @@ CFLAGS += \
 # suppress warning caused by vendor mcu driver
 CFLAGS += -Wno-error=maybe-uninitialized -Wno-error=cast-align -Wno-error=undef -Wno-error=unused-parameter
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \
 	$(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
diff --git a/hw/bsp/stm32wb/family.mk b/hw/bsp/stm32wb/family.mk
index bc3afcaff..287b58ce5 100644
--- a/hw/bsp/stm32wb/family.mk
+++ b/hw/bsp/stm32wb/family.mk
@@ -16,6 +16,8 @@ CFLAGS += \
 # suppress warning caused by vendor mcu driver
 CFLAGS += -Wno-error=cast-align -Wno-unused-parameter
 
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
 SRC_C += \
 	src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c \
 	$(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
diff --git a/hw/bsp/tm4c123/family.mk b/hw/bsp/tm4c123/family.mk
index 608c530bb..49e39f6a0 100644
--- a/hw/bsp/tm4c123/family.mk
+++ b/hw/bsp/tm4c123/family.mk
@@ -1,4 +1,5 @@
 DEPS_SUBMODULES += hw/mcu/ti
+MCU_DIR=hw/mcu/ti/tm4c123xx
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 CPU_CORE ?= cortex-m4
@@ -12,7 +13,7 @@ CFLAGS += \
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=strict-prototypes -Wno-error=cast-qual
 
-MCU_DIR=hw/mcu/ti/tm4c123xx/
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
 
 # All source paths should be relative to the top level.
 LD_FILE = $(BOARD_PATH)/tm4c123.ld

From 54356a719e3968702d86346ec6305679ebd9dd0f Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 17:53:17 +0700
Subject: [PATCH 5/7] minor-update

---
 hw/bsp/board.c                      | 20 ++++++---
 hw/bsp/family_support.cmake         |  5 ++-
 hw/bsp/nrf/family.cmake             |  4 +-
 hw/bsp/nrf/family.mk                |  3 ++
 hw/bsp/stm32h7/family.cmake         |  4 +-
 src/osal/osal_none.h                | 64 +++++++++++------------------
 tools/cmake/toolchain/arm_gcc.cmake |  2 +-
 7 files changed, 47 insertions(+), 55 deletions(-)

diff --git a/hw/bsp/board.c b/hw/bsp/board.c
index 562792625..23b4b6628 100644
--- a/hw/bsp/board.c
+++ b/hw/bsp/board.c
@@ -44,13 +44,12 @@
 
 // If using SES IDE, use the Syscalls/SEGGER_RTT_Syscalls_SES.c instead
 #if !(defined __SES_ARM) && !(defined __SES_RISCV) && !(defined __CROSSWORKS_ARM)
-
 #include "SEGGER_RTT.h"
 
-TU_ATTR_USED int sys_write(int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write(int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   SEGGER_RTT_Write(0, (const char *) buf, (int) count);
-  return count;
+  return (int) count;
 }
 
 TU_ATTR_USED int sys_read(int fhdl, char *buf, size_t count) {
@@ -63,10 +62,9 @@ TU_ATTR_USED int sys_read(int fhdl, char *buf, size_t count) {
 
 #elif defined(LOGGER_SWO)
 // Logging with SWO for ARM Cortex
-
 #include "board_mcu.h"
 
-TU_ATTR_USED int sys_write (int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write (int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   uint8_t const* buf8 = (uint8_t const*) buf;
 
@@ -87,7 +85,7 @@ TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count) {
 #else
 
 // Default logging with on-board UART
-TU_ATTR_USED int sys_write (int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write (int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   return board_uart_write(buf, (int) count);
 }
@@ -100,6 +98,16 @@ TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count) {
 
 #endif
 
+//TU_ATTR_USED int _close(int fhdl) {
+//  (void) fhdl;
+//  return 0;
+//}
+
+//TU_ATTR_USED int _fstat(int file, struct stat *st) {
+//  memset(st, 0, sizeof(*st));
+//  st->st_mode = S_IFCHR;
+//}
+
 int board_getchar(void) {
   char c;
   return (sys_read(0, &c, 1) > 0) ? (int) c : (-1);
diff --git a/hw/bsp/family_support.cmake b/hw/bsp/family_support.cmake
index eec42160e..930237fea 100644
--- a/hw/bsp/family_support.cmake
+++ b/hw/bsp/family_support.cmake
@@ -201,6 +201,9 @@ function(family_configure_common TARGET RTOS)
   # Generate linker map file
   if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     target_link_options(${TARGET} PUBLIC "LINKER:-Map=$<TARGET_FILE:${TARGET}>.map")
+    if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 12.0)
+      target_link_options(${TARGET} PUBLIC "LINKER:--no-warn-rwx-segments")
+    endif ()
   endif()
 
   # ETM Trace option
@@ -289,13 +292,11 @@ function(family_configure_device_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
 endfunction()
 
-
 # Configure host example with RTOS
 function(family_configure_host_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
 endfunction()
 
-
 # Configure host + device example with RTOS
 function(family_configure_dual_usb_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
diff --git a/hw/bsp/nrf/family.cmake b/hw/bsp/nrf/family.cmake
index 99d9ac6dd..8cee2b433 100644
--- a/hw/bsp/nrf/family.cmake
+++ b/hw/bsp/nrf/family.cmake
@@ -84,9 +84,7 @@ function(add_board_target BOARD_TARGET)
         # linker file
         "LINKER:--script=${LD_FILE_GNU}"
         -L${NRFX_DIR}/mdk
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
+        --specs=nosys.specs --specs=nano.specs
         )
     elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
       target_link_options(${BOARD_TARGET} PUBLIC
diff --git a/hw/bsp/nrf/family.mk b/hw/bsp/nrf/family.mk
index df22477df..29802dc37 100644
--- a/hw/bsp/nrf/family.mk
+++ b/hw/bsp/nrf/family.mk
@@ -12,6 +12,9 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_NRF5X \
   -DCONFIG_GPIO_AS_PINRESET
 
+#CFLAGS += -nostdlib
+#CFLAGS += -D__START=main
+
 # suppress warning caused by vendor mcu driver
 CFLAGS += \
   -Wno-error=undef \
diff --git a/hw/bsp/stm32h7/family.cmake b/hw/bsp/stm32h7/family.cmake
index c08857a50..2d6ec76c8 100644
--- a/hw/bsp/stm32h7/family.cmake
+++ b/hw/bsp/stm32h7/family.cmake
@@ -66,9 +66,7 @@ function(add_board_target BOARD_TARGET)
       target_link_options(${BOARD_TARGET} PUBLIC
         "LINKER:--script=${LD_FILE_GNU}"
         -nostartfiles
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
+        --specs=nosys.specs --specs=nano.specs
         )
     elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
       target_link_options(${BOARD_TARGET} PUBLIC
diff --git a/src/osal/osal_none.h b/src/osal/osal_none.h
index 76e77c25d..a07d39828 100644
--- a/src/osal/osal_none.h
+++ b/src/osal/osal_none.h
@@ -24,11 +24,11 @@
  * This file is part of the TinyUSB stack.
  */
 
-#ifndef _TUSB_OSAL_NONE_H_
-#define _TUSB_OSAL_NONE_H_
+#ifndef TUSB_OSAL_NONE_H_
+#define TUSB_OSAL_NONE_H_
 
 #ifdef __cplusplus
- extern "C" {
+extern "C" {
 #endif
 
 //--------------------------------------------------------------------+
@@ -43,39 +43,34 @@ TU_ATTR_WEAK void osal_task_delay(uint32_t msec);
 //--------------------------------------------------------------------+
 // Binary Semaphore API
 //--------------------------------------------------------------------+
-typedef struct
-{
+typedef struct {
   volatile uint16_t count;
-}osal_semaphore_def_t;
+} osal_semaphore_def_t;
 
 typedef osal_semaphore_def_t* osal_semaphore_t;
 
-TU_ATTR_ALWAYS_INLINE static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef) {
   semdef->count = 0;
   return semdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr) {
   (void) in_isr;
   sem_hdl->count++;
   return true;
 }
 
 // TODO blocking for now
-TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_wait (osal_semaphore_t sem_hdl, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_wait(osal_semaphore_t sem_hdl, uint32_t msec) {
   (void) msec;
 
-  while (sem_hdl->count == 0) { }
+  while (sem_hdl->count == 0) {}
   sem_hdl->count--;
 
   return true;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl) {
   sem_hdl->count = 0;
 }
 
@@ -90,19 +85,16 @@ typedef osal_semaphore_t osal_mutex_t;
 // Note: multiple cores MCUs usually do provide IPC API for mutex
 // or we can use std atomic function
 
-TU_ATTR_ALWAYS_INLINE static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef) {
   mdef->count = 1;
   return mdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec) {
   return osal_semaphore_wait(mutex_hdl, msec);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl) {
   return osal_semaphore_post(mutex_hdl, false);
 }
 
@@ -119,11 +111,10 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hd
 //--------------------------------------------------------------------+
 #include "common/tusb_fifo.h"
 
-typedef struct
-{
-  void (*interrupt_set)(bool);
+typedef struct {
+  void (* interrupt_set)(bool);
   tu_fifo_t ff;
-}osal_queue_def_t;
+} osal_queue_def_t;
 
 typedef osal_queue_def_t* osal_queue_t;
 
@@ -136,27 +127,23 @@ typedef osal_queue_def_t* osal_queue_t;
   }
 
 // lock queue by disable USB interrupt
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl) {
   // disable dcd/hcd interrupt
   qhdl->interrupt_set(false);
 }
 
 // unlock queue
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl) {
   // enable dcd/hcd interrupt
   qhdl->interrupt_set(true);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef) {
   tu_fifo_clear(&qdef->ff);
   return (osal_queue_t) qdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec) {
   (void) msec; // not used, always behave as msec = 0
 
   _osal_q_lock(qhdl);
@@ -166,8 +153,7 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, v
   return success;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const * data, bool in_isr)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const* data, bool in_isr) {
   if (!in_isr) {
     _osal_q_lock(qhdl);
   }
@@ -179,19 +165,17 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void
   }
 
   TU_ASSERT(success);
-
   return success;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_empty(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_empty(osal_queue_t qhdl) {
   // Skip queue lock/unlock since this function is primarily called
   // with interrupt disabled before going into low power mode
   return tu_fifo_empty(&qhdl->ff);
 }
 
 #ifdef __cplusplus
- }
+}
 #endif
 
-#endif /* _TUSB_OSAL_NONE_H_ */
+#endif
diff --git a/tools/cmake/toolchain/arm_gcc.cmake b/tools/cmake/toolchain/arm_gcc.cmake
index cefa9d2ce..7680d75ab 100644
--- a/tools/cmake/toolchain/arm_gcc.cmake
+++ b/tools/cmake/toolchain/arm_gcc.cmake
@@ -29,7 +29,7 @@ list(APPEND TOOLCHAIN_COMMON_FLAGS
   -fno-strict-aliasing
   )
 
-set(TOOLCHAIN_EXE_LINKER_FLAGS
+list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
   -Wl,--print-memory-usage
   -Wl,--gc-sections
   -Wl,--cref

From 7213b8abb126cb6a1c88bd1e6d89b7dbacf339d8 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 20:06:22 +0700
Subject: [PATCH 6/7] move tools/cmake to examples/build_system

---
 {tools => examples/build_system}/cmake/cpu/cortex-m0.cmake      | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m0plus.cmake  | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m23.cmake     | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m3.cmake      | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m33.cmake     | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m4.cmake      | 0
 {tools => examples/build_system}/cmake/cpu/cortex-m7.cmake      | 0
 {tools => examples/build_system}/cmake/toolchain/arm_gcc.cmake  | 0
 {tools => examples/build_system}/cmake/toolchain/arm_iar.cmake  | 0
 .../build_system}/cmake/toolchain/set_flags.cmake               | 0
 hw/bsp/imxrt/family.cmake                                       | 2 +-
 hw/bsp/kinetis_kl/family.cmake                                  | 2 +-
 hw/bsp/lpc18/family.cmake                                       | 2 +-
 hw/bsp/lpc40/family.cmake                                       | 2 +-
 hw/bsp/lpc43/family.cmake                                       | 2 +-
 hw/bsp/lpc54/family.cmake                                       | 2 +-
 hw/bsp/lpc55/family.cmake                                       | 2 +-
 hw/bsp/mcx/family.cmake                                         | 2 +-
 hw/bsp/nrf/family.cmake                                         | 2 +-
 hw/bsp/ra/family.cmake                                          | 2 +-
 hw/bsp/samd21/family.cmake                                      | 2 +-
 hw/bsp/samd51/family.cmake                                      | 2 +-
 hw/bsp/stm32f0/family.cmake                                     | 2 +-
 hw/bsp/stm32f1/family.cmake                                     | 2 +-
 hw/bsp/stm32f4/family.cmake                                     | 2 +-
 hw/bsp/stm32f7/family.cmake                                     | 2 +-
 hw/bsp/stm32g0/family.cmake                                     | 2 +-
 hw/bsp/stm32g4/family.cmake                                     | 2 +-
 hw/bsp/stm32h7/family.cmake                                     | 2 +-
 hw/bsp/stm32l4/family.cmake                                     | 2 +-
 hw/bsp/stm32u5/family.cmake                                     | 2 +-
 31 files changed, 21 insertions(+), 21 deletions(-)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m0.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m0plus.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m23.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m3.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m33.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m4.cmake (100%)
 rename {tools => examples/build_system}/cmake/cpu/cortex-m7.cmake (100%)
 rename {tools => examples/build_system}/cmake/toolchain/arm_gcc.cmake (100%)
 rename {tools => examples/build_system}/cmake/toolchain/arm_iar.cmake (100%)
 rename {tools => examples/build_system}/cmake/toolchain/set_flags.cmake (100%)

diff --git a/tools/cmake/cpu/cortex-m0.cmake b/examples/build_system/cmake/cpu/cortex-m0.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m0.cmake
rename to examples/build_system/cmake/cpu/cortex-m0.cmake
diff --git a/tools/cmake/cpu/cortex-m0plus.cmake b/examples/build_system/cmake/cpu/cortex-m0plus.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m0plus.cmake
rename to examples/build_system/cmake/cpu/cortex-m0plus.cmake
diff --git a/tools/cmake/cpu/cortex-m23.cmake b/examples/build_system/cmake/cpu/cortex-m23.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m23.cmake
rename to examples/build_system/cmake/cpu/cortex-m23.cmake
diff --git a/tools/cmake/cpu/cortex-m3.cmake b/examples/build_system/cmake/cpu/cortex-m3.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m3.cmake
rename to examples/build_system/cmake/cpu/cortex-m3.cmake
diff --git a/tools/cmake/cpu/cortex-m33.cmake b/examples/build_system/cmake/cpu/cortex-m33.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m33.cmake
rename to examples/build_system/cmake/cpu/cortex-m33.cmake
diff --git a/tools/cmake/cpu/cortex-m4.cmake b/examples/build_system/cmake/cpu/cortex-m4.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m4.cmake
rename to examples/build_system/cmake/cpu/cortex-m4.cmake
diff --git a/tools/cmake/cpu/cortex-m7.cmake b/examples/build_system/cmake/cpu/cortex-m7.cmake
similarity index 100%
rename from tools/cmake/cpu/cortex-m7.cmake
rename to examples/build_system/cmake/cpu/cortex-m7.cmake
diff --git a/tools/cmake/toolchain/arm_gcc.cmake b/examples/build_system/cmake/toolchain/arm_gcc.cmake
similarity index 100%
rename from tools/cmake/toolchain/arm_gcc.cmake
rename to examples/build_system/cmake/toolchain/arm_gcc.cmake
diff --git a/tools/cmake/toolchain/arm_iar.cmake b/examples/build_system/cmake/toolchain/arm_iar.cmake
similarity index 100%
rename from tools/cmake/toolchain/arm_iar.cmake
rename to examples/build_system/cmake/toolchain/arm_iar.cmake
diff --git a/tools/cmake/toolchain/set_flags.cmake b/examples/build_system/cmake/toolchain/set_flags.cmake
similarity index 100%
rename from tools/cmake/toolchain/set_flags.cmake
rename to examples/build_system/cmake/toolchain/set_flags.cmake
diff --git a/hw/bsp/imxrt/family.cmake b/hw/bsp/imxrt/family.cmake
index ecde39611..090014754 100644
--- a/hw/bsp/imxrt/family.cmake
+++ b/hw/bsp/imxrt/family.cmake
@@ -13,7 +13,7 @@ set(MCU_VARIANT_WITH_CORE ${MCU_VARIANT}${MCU_CORE})
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS MIMXRT1XXX CACHE INTERNAL "")
 
diff --git a/hw/bsp/kinetis_kl/family.cmake b/hw/bsp/kinetis_kl/family.cmake
index 4151979a0..6d9b65df0 100644
--- a/hw/bsp/kinetis_kl/family.cmake
+++ b/hw/bsp/kinetis_kl/family.cmake
@@ -12,7 +12,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m0plus CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS KINETIS_KL CACHE INTERNAL "")
 
diff --git a/hw/bsp/lpc18/family.cmake b/hw/bsp/lpc18/family.cmake
index 74a794bde..78f4c510b 100644
--- a/hw/bsp/lpc18/family.cmake
+++ b/hw/bsp/lpc18/family.cmake
@@ -11,7 +11,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m3 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS LPC18XX CACHE INTERNAL "")
 
diff --git a/hw/bsp/lpc40/family.cmake b/hw/bsp/lpc40/family.cmake
index 56eb37a2f..fce9772b6 100644
--- a/hw/bsp/lpc40/family.cmake
+++ b/hw/bsp/lpc40/family.cmake
@@ -7,7 +7,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS LPC18XX CACHE INTERNAL "")
 
diff --git a/hw/bsp/lpc43/family.cmake b/hw/bsp/lpc43/family.cmake
index 608fc4ca3..f66da98aa 100644
--- a/hw/bsp/lpc43/family.cmake
+++ b/hw/bsp/lpc43/family.cmake
@@ -7,7 +7,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS LPC43XX CACHE INTERNAL "")
 
diff --git a/hw/bsp/lpc54/family.cmake b/hw/bsp/lpc54/family.cmake
index cdd513fe4..287b437fb 100644
--- a/hw/bsp/lpc54/family.cmake
+++ b/hw/bsp/lpc54/family.cmake
@@ -12,7 +12,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS LPC54 CACHE INTERNAL "")
 
diff --git a/hw/bsp/lpc55/family.cmake b/hw/bsp/lpc55/family.cmake
index dce197b2d..75dabfe5a 100644
--- a/hw/bsp/lpc55/family.cmake
+++ b/hw/bsp/lpc55/family.cmake
@@ -12,7 +12,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m33 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS LPC55 CACHE INTERNAL "")
 
diff --git a/hw/bsp/mcx/family.cmake b/hw/bsp/mcx/family.cmake
index b3a4a846e..13d1d44ef 100644
--- a/hw/bsp/mcx/family.cmake
+++ b/hw/bsp/mcx/family.cmake
@@ -12,7 +12,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m33 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS MCXN9 CACHE INTERNAL "")
 
diff --git a/hw/bsp/nrf/family.cmake b/hw/bsp/nrf/family.cmake
index 8cee2b433..2c4620b97 100644
--- a/hw/bsp/nrf/family.cmake
+++ b/hw/bsp/nrf/family.cmake
@@ -19,7 +19,7 @@ else ()
   set(JLINK_DEVICE ${MCU_VARIANT}_xxaa)
 endif ()
 
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS NRF5X CACHE INTERNAL "")
 
diff --git a/hw/bsp/ra/family.cmake b/hw/bsp/ra/family.cmake
index 11bc7c668..426e1ca8f 100644
--- a/hw/bsp/ra/family.cmake
+++ b/hw/bsp/ra/family.cmake
@@ -11,7 +11,7 @@ set(FSP_RA ${TOP}/hw/mcu/renesas/fsp/ra/fsp)
 include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 #set(FREERTOS_PORT A_CUSTOM_PORT CACHE INTERNAL "")
 
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS RAXXX ${MCU_VARIANT} CACHE INTERNAL "")
 
diff --git a/hw/bsp/samd21/family.cmake b/hw/bsp/samd21/family.cmake
index 07186934a..44aad6ecb 100644
--- a/hw/bsp/samd21/family.cmake
+++ b/hw/bsp/samd21/family.cmake
@@ -7,7 +7,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m0plus CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS SAMD21 CACHE INTERNAL "")
 
diff --git a/hw/bsp/samd51/family.cmake b/hw/bsp/samd51/family.cmake
index fa9586066..7591f3b1b 100644
--- a/hw/bsp/samd51/family.cmake
+++ b/hw/bsp/samd51/family.cmake
@@ -7,7 +7,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS SAMD51 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32f0/family.cmake b/hw/bsp/stm32f0/family.cmake
index e0fc705f8..89c93c47a 100644
--- a/hw/bsp/stm32f0/family.cmake
+++ b/hw/bsp/stm32f0/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m0 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32F0 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32f1/family.cmake b/hw/bsp/stm32f1/family.cmake
index 53af35862..6657c85ce 100644
--- a/hw/bsp/stm32f1/family.cmake
+++ b/hw/bsp/stm32f1/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m3 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32F1 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32f4/family.cmake b/hw/bsp/stm32f4/family.cmake
index cad504bac..71ec33c6e 100644
--- a/hw/bsp/stm32f4/family.cmake
+++ b/hw/bsp/stm32f4/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32F4 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32f7/family.cmake b/hw/bsp/stm32f7/family.cmake
index 48dd9c7ca..5b3bdf17e 100644
--- a/hw/bsp/stm32f7/family.cmake
+++ b/hw/bsp/stm32f7/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32F7 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32g0/family.cmake b/hw/bsp/stm32g0/family.cmake
index cf52a6324..0a9779022 100644
--- a/hw/bsp/stm32g0/family.cmake
+++ b/hw/bsp/stm32g0/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m0plus CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32G0 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32g4/family.cmake b/hw/bsp/stm32g4/family.cmake
index eee6bd9ed..15a834a00 100644
--- a/hw/bsp/stm32g4/family.cmake
+++ b/hw/bsp/stm32g4/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32G4 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32h7/family.cmake b/hw/bsp/stm32h7/family.cmake
index 2d6ec76c8..6174dfda3 100644
--- a/hw/bsp/stm32h7/family.cmake
+++ b/hw/bsp/stm32h7/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32H7 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32l4/family.cmake b/hw/bsp/stm32l4/family.cmake
index 87f87004b..9b06a64d4 100644
--- a/hw/bsp/stm32l4/family.cmake
+++ b/hw/bsp/stm32l4/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32L4 CACHE INTERNAL "")
 
diff --git a/hw/bsp/stm32u5/family.cmake b/hw/bsp/stm32u5/family.cmake
index 2e4ed7d50..cde1df5ca 100644
--- a/hw/bsp/stm32u5/family.cmake
+++ b/hw/bsp/stm32u5/family.cmake
@@ -16,7 +16,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m33 CACHE INTERNAL "System Processor")
-set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32U5 CACHE INTERNAL "")
 

From 26ca48e7a7a93f8b7f13a209745080855a7bc4fe Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 23 Nov 2023 20:19:14 +0700
Subject: [PATCH 7/7] move make.mk and rules.mk to build_system/make

---
 .idea/cmake.xml                                 | 2 +-
 examples/{ => build_system/make}/make.mk        | 4 ++--
 examples/{ => build_system/make}/rules.mk       | 0
 examples/device/audio_4_channel_mic/Makefile    | 4 ++--
 examples/device/audio_test/Makefile             | 4 ++--
 examples/device/audio_test_multi_rate/Makefile  | 4 ++--
 examples/device/board_test/Makefile             | 4 ++--
 examples/device/cdc_dual_ports/Makefile         | 4 ++--
 examples/device/cdc_msc/Makefile                | 4 ++--
 examples/device/cdc_msc_freertos/Makefile       | 4 ++--
 examples/device/cdc_uac2/Makefile               | 4 ++--
 examples/device/dfu/Makefile                    | 4 ++--
 examples/device/dfu_runtime/Makefile            | 4 ++--
 examples/device/dynamic_configuration/Makefile  | 4 ++--
 examples/device/hid_boot_interface/Makefile     | 4 ++--
 examples/device/hid_composite/Makefile          | 4 ++--
 examples/device/hid_composite_freertos/Makefile | 4 ++--
 examples/device/hid_generic_inout/Makefile      | 4 ++--
 examples/device/hid_multiple_interface/Makefile | 4 ++--
 examples/device/midi_test/Makefile              | 4 ++--
 examples/device/msc_dual_lun/Makefile           | 4 ++--
 examples/device/net_lwip_webserver/Makefile     | 4 ++--
 examples/device/uac2_headset/Makefile           | 4 ++--
 examples/device/usbtmc/Makefile                 | 4 ++--
 examples/device/video_capture/Makefile          | 4 ++--
 examples/device/webusb_serial/Makefile          | 4 ++--
 examples/dual/host_hid_to_device_cdc/Makefile   | 4 ++--
 examples/host/bare_api/Makefile                 | 4 ++--
 examples/host/cdc_msc_hid/Makefile              | 4 ++--
 examples/host/cdc_msc_hid_freertos/Makefile     | 4 ++--
 examples/host/hid_controller/Makefile           | 4 ++--
 examples/host/msc_file_explorer/Makefile        | 4 ++--
 examples/typec/power_delivery/Makefile          | 4 ++--
 tools/build_make.py                             | 4 ++--
 34 files changed, 65 insertions(+), 65 deletions(-)
 rename examples/{ => build_system/make}/make.mk (96%)
 rename examples/{ => build_system/make}/rules.mk (100%)

diff --git a/.idea/cmake.xml b/.idea/cmake.xml
index 97e503033..101f08078 100644
--- a/.idea/cmake.xml
+++ b/.idea/cmake.xml
@@ -63,7 +63,7 @@
       <configuration PROFILE_NAME="stm32f411disco" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32f411disco -DLOG=2 -DLOGGER=RTT" />
       <configuration PROFILE_NAME="stm32f769disco" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32f769disco -DLOG=3 -DLOGGER=RTT" />
       <configuration PROFILE_NAME="stm32h743eval" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32h743eval -DLOG=3 -DLOGGER=RTT -DTRACE_ETM=1" />
-      <configuration PROFILE_NAME="stm32h743nucleo" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32h743nucleo -DLOG=3 -DLOGGER=RTT" />
+      <configuration PROFILE_NAME="stm32h743nucleo" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32h743nucleo -DLOG=3" />
       <configuration PROFILE_NAME="stm32l476disco" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32l476disco" />
       <configuration PROFILE_NAME="stm32g0b1nucleo" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32g0b1nucleo" />
       <configuration PROFILE_NAME="stm32g474nucleo" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=stm32g474nucleo" />
diff --git a/examples/make.mk b/examples/build_system/make/make.mk
similarity index 96%
rename from examples/make.mk
rename to examples/build_system/make/make.mk
index b646b46ce..e1113aa52 100644
--- a/examples/make.mk
+++ b/examples/build_system/make/make.mk
@@ -8,9 +8,9 @@
 # $(lastword $(MAKEFILE_LIST)) returns the name of this makefile relative to where make was invoked.
 THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST))
 
-# strip off /tools/top.mk to get for example ../../..
+# strip off /examples/build_system/make to get for example ../../..
 # and Set TOP to an absolute path
-TOP = $(abspath $(subst make.mk,..,$(THIS_MAKEFILE)))
+TOP = $(abspath $(subst make.mk,../../..,$(THIS_MAKEFILE)))
 
 # Set CURRENT_PATH to the relative path from TOP to the current directory, ie examples/device/cdc_msc_freertos
 CURRENT_PATH = $(subst $(TOP)/,,$(abspath .))
diff --git a/examples/rules.mk b/examples/build_system/make/rules.mk
similarity index 100%
rename from examples/rules.mk
rename to examples/build_system/make/rules.mk
diff --git a/examples/device/audio_4_channel_mic/Makefile b/examples/device/audio_4_channel_mic/Makefile
index 8ee6a01ec..2c825bbf7 100644
--- a/examples/device/audio_4_channel_mic/Makefile
+++ b/examples/device/audio_4_channel_mic/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -11,4 +11,4 @@ EXAMPLE_SOURCE += \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/audio_test/Makefile b/examples/device/audio_test/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/audio_test/Makefile
+++ b/examples/device/audio_test/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/audio_test_multi_rate/Makefile b/examples/device/audio_test_multi_rate/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/audio_test_multi_rate/Makefile
+++ b/examples/device/audio_test_multi_rate/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/board_test/Makefile b/examples/device/board_test/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/board_test/Makefile
+++ b/examples/device/board_test/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/cdc_dual_ports/Makefile b/examples/device/cdc_dual_ports/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/cdc_dual_ports/Makefile
+++ b/examples/device/cdc_dual_ports/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/cdc_msc/Makefile b/examples/device/cdc_msc/Makefile
index 429959e70..0c2e37180 100644
--- a/examples/device/cdc_msc/Makefile
+++ b/examples/device/cdc_msc/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -12,4 +12,4 @@ EXAMPLE_SOURCE += \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/cdc_msc_freertos/Makefile b/examples/device/cdc_msc_freertos/Makefile
index 84c833fb5..13f336f99 100644
--- a/examples/device/cdc_msc_freertos/Makefile
+++ b/examples/device/cdc_msc_freertos/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
 FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
@@ -43,4 +43,4 @@ CFLAGS_GCC += -Wno-error=cast-qual
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/cdc_uac2/Makefile b/examples/device/cdc_uac2/Makefile
index b7a8302ce..21dcdb0b2 100644
--- a/examples/device/cdc_uac2/Makefile
+++ b/examples/device/cdc_uac2/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -13,4 +13,4 @@ EXAMPLE_SOURCE += \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/dfu/Makefile b/examples/device/dfu/Makefile
index b3f2cc588..52a24cdb0 100644
--- a/examples/device/dfu/Makefile
+++ b/examples/device/dfu/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -11,4 +11,4 @@ EXAMPLE_SOURCE = \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/dfu_runtime/Makefile b/examples/device/dfu_runtime/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/dfu_runtime/Makefile
+++ b/examples/device/dfu_runtime/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/dynamic_configuration/Makefile b/examples/device/dynamic_configuration/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/dynamic_configuration/Makefile
+++ b/examples/device/dynamic_configuration/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_boot_interface/Makefile b/examples/device/hid_boot_interface/Makefile
index b3f2cc588..52a24cdb0 100644
--- a/examples/device/hid_boot_interface/Makefile
+++ b/examples/device/hid_boot_interface/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -11,4 +11,4 @@ EXAMPLE_SOURCE = \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_composite/Makefile b/examples/device/hid_composite/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/hid_composite/Makefile
+++ b/examples/device/hid_composite/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_composite_freertos/Makefile b/examples/device/hid_composite_freertos/Makefile
index a892e7d1d..add9e9814 100644
--- a/examples/device/hid_composite_freertos/Makefile
+++ b/examples/device/hid_composite_freertos/Makefile
@@ -1,6 +1,6 @@
 DEPS_SUBMODULES += lib/FreeRTOS-Kernel
 
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
 FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
@@ -44,4 +44,4 @@ CFLAGS_GCC += -Wno-error=cast-qual
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_generic_inout/Makefile b/examples/device/hid_generic_inout/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/hid_generic_inout/Makefile
+++ b/examples/device/hid_generic_inout/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_multiple_interface/Makefile b/examples/device/hid_multiple_interface/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/hid_multiple_interface/Makefile
+++ b/examples/device/hid_multiple_interface/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/midi_test/Makefile b/examples/device/midi_test/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/midi_test/Makefile
+++ b/examples/device/midi_test/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/msc_dual_lun/Makefile b/examples/device/msc_dual_lun/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/msc_dual_lun/Makefile
+++ b/examples/device/msc_dual_lun/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/net_lwip_webserver/Makefile b/examples/device/net_lwip_webserver/Makefile
index 90b429d00..22426ba0d 100644
--- a/examples/device/net_lwip_webserver/Makefile
+++ b/examples/device/net_lwip_webserver/Makefile
@@ -1,6 +1,6 @@
 DEPS_SUBMODULES += lib/lwip
 
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 # suppress warning caused by lwip
 CFLAGS_GCC += \
@@ -67,4 +67,4 @@ SRC_C += \
   lib/networking/dnserver.c \
   lib/networking/rndis_reports.c
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/uac2_headset/Makefile b/examples/device/uac2_headset/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/uac2_headset/Makefile
+++ b/examples/device/uac2_headset/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/usbtmc/Makefile b/examples/device/usbtmc/Makefile
index da088ea6b..1b4d398cf 100644
--- a/examples/device/usbtmc/Makefile
+++ b/examples/device/usbtmc/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/video_capture/Makefile b/examples/device/video_capture/Makefile
index 90d174c32..d698a848d 100644
--- a/examples/device/video_capture/Makefile
+++ b/examples/device/video_capture/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 ifeq ($(DISABLE_MJPEG),1)
 CFLAGS += -DCFG_EXAMPLE_VIDEO_DISABLE_MJPEG
@@ -15,4 +15,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/device/webusb_serial/Makefile b/examples/device/webusb_serial/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/device/webusb_serial/Makefile
+++ b/examples/device/webusb_serial/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/dual/host_hid_to_device_cdc/Makefile b/examples/dual/host_hid_to_device_cdc/Makefile
index 95c88e7e8..2c2168f5d 100644
--- a/examples/dual/host_hid_to_device_cdc/Makefile
+++ b/examples/dual/host_hid_to_device_cdc/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -15,4 +15,4 @@ SRC_C += \
 	src/host/hub.c \
 	src/host/usbh.c
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/host/bare_api/Makefile b/examples/host/bare_api/Makefile
index 161f8c774..0235e08c3 100644
--- a/examples/host/bare_api/Makefile
+++ b/examples/host/bare_api/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -10,4 +10,4 @@ EXAMPLE_SOURCE += \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/host/cdc_msc_hid/Makefile b/examples/host/cdc_msc_hid/Makefile
index 15b8a5b31..213c02f9c 100644
--- a/examples/host/cdc_msc_hid/Makefile
+++ b/examples/host/cdc_msc_hid/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -13,4 +13,4 @@ EXAMPLE_SOURCE = \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/host/cdc_msc_hid_freertos/Makefile b/examples/host/cdc_msc_hid_freertos/Makefile
index a9670b4f2..5351a6248 100644
--- a/examples/host/cdc_msc_hid_freertos/Makefile
+++ b/examples/host/cdc_msc_hid_freertos/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
 FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
@@ -31,4 +31,4 @@ SRC_C += \
 SRC_S += \
 	$(subst $(TOP)/,,$(wildcard $(TOP)/$(FREERTOS_PORTABLE_SRC)/*.s))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/host/hid_controller/Makefile b/examples/host/hid_controller/Makefile
index e7f603f25..1377f1f90 100644
--- a/examples/host/hid_controller/Makefile
+++ b/examples/host/hid_controller/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
 	src \
@@ -11,4 +11,4 @@ EXAMPLE_SOURCE += \
 
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/host/msc_file_explorer/Makefile b/examples/host/msc_file_explorer/Makefile
index 8319d3c2b..c7d6a7cae 100644
--- a/examples/host/msc_file_explorer/Makefile
+++ b/examples/host/msc_file_explorer/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 FATFS_PATH = lib/fatfs/source
 
@@ -24,4 +24,4 @@ SRC_C += \
 # suppress warning caused by fatfs
 CFLAGS += -Wno-error=cast-qual
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/examples/typec/power_delivery/Makefile b/examples/typec/power_delivery/Makefile
index 2a3d854fb..7fa475da5 100644
--- a/examples/typec/power_delivery/Makefile
+++ b/examples/typec/power_delivery/Makefile
@@ -1,4 +1,4 @@
-include ../../make.mk
+include ../../build_system/make/make.mk
 
 INC += \
   src \
@@ -8,4 +8,4 @@ INC += \
 EXAMPLE_SOURCE += $(wildcard src/*.c)
 SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
 
-include ../../rules.mk
+include ../../build_system/make/rules.mk
diff --git a/tools/build_make.py b/tools/build_make.py
index cd9884313..f79a452e4 100644
--- a/tools/build_make.py
+++ b/tools/build_make.py
@@ -43,9 +43,9 @@ if __name__ == '__main__':
     # If examples are not specified in arguments, build all
     all_examples = []
     for d in os.scandir("examples"):
-        if d.is_dir() and 'cmake' not in d.name:
+        if d.is_dir() and 'cmake' not in d.name and 'build_system' not in d.name:
             for entry in os.scandir(d.path):
-                if entry.is_dir() and 'cmake' not in entry.name and entry.name != 'build_system':
+                if entry.is_dir() and 'cmake' not in entry.name:
                     all_examples.append(d.name + '/' + entry.name)
     filter_with_input(all_examples)
     all_examples.sort()