pico-sdk/bazel/BUILD.bazel
armandomontanez 6ff3e4fab2
Expand bazel build to include configuration options and broader support. (#1731)
* Add host Bazel build

Updates target_compatible_with across the repo to ensure that wildcard
builds for both host and rp2040 succeed.

* Get unit tests building

* Add Python script to identify build system differences

Uses the build system tags to make it easier to identify differences
between the CMake and Bazel builds.

* Temporarily disable pico divider test

* Support PICO_BARE_METAL in Bazel

* Support PICO_NO_GC_SECTIONS in Bazel

* Support boot2 configuration in Bazel

Adds support for PICO_DEFAULT_BOOT_STAGE2 and
PICO_DEFAULT_BOOT_STAGE2_FILE in the Bazel build.

* Allowlist some CMake-only options

* Support CXX configuration options in Bazel

* Move multiple_choice_flag.bzl

* Support all pico boards

* Support linking multiple stdio implementations

Changes the Bazel build so stdio implementations are no longer mutually
exclusive.

* Add PICO_BOOT_STAGE2_LINK_IMAGE

* Support PICO_CMSIS_PATH in Bazel

* Support PICO_USE_DEFAULT_MAX_PAGE_SIZE in Bazel

* Silence PICO_CMSIS_VENDOR and PICO_CMSIS_DEVICE differences

* Support PICO_STDIO_USB_CONNECT_WAIT_TIMEOUT_MS in Bazel

* Properly support version defines

* Support embedding binary info in Bazel

* Embed build type in binary

* Support different linker scripts in Bazel build

* Finish out missing PICO_BUILD_DEFINE in Bazel build

* Support PICO_NO_TARGET_NAME

* Reorganize initial configuration options in Bazel

Cleans up and reorganizes some of the initial configuration options
added to the Bazel build so everything is consistent.

* Add builds for pioasm and elf2uf2

* Use Python rules from rules_python

* Actually link in output formats in pioasm tool

* Make tools have public visibility

* Add UF2 Bazel aspect

* Add TODOs for pioasm/uf2 helpers

* Fix compile flag typo

* Update Bazel SDK configuration strings to match recent CMake changes

* Fix pico_divider test

* Clean up straggling TODOs

* Clarify pico_stdio_test compatibility

* Initial Bazel Pico W support

* Add new files from develop

* Clean up compatibility expressions in Bazel build

* Clean up rp2 constraint handling in Bazel

* More Bazel docs cleanup

* Format Bazel build files

* Consolidate transitions in the Pico SDK

* Make every _allowlist_function_transition explicit

* More docs cleanup

* Add a few missing defines

* Improve PICO_CONFIG_HEADER correctness in Bazel

* Minor docs clarifications
2024-06-13 09:50:04 -05:00

58 lines
1.9 KiB
Python

load("@rules_python//python:defs.bzl", "py_binary")
package(default_visibility = ["//visibility:public"])
py_binary(
name = "generate_version_header",
srcs = ["generate_version_header.py"],
visibility = ["//:__subpackages__"],
)
# This isn't actually generated, it just uses the same name
# to make it show up easier in searches.
#
# Rather than generating lists of headers to match CMake, the Bazel build
# opts to have a static header that transitively include two known headers.
# By default, empty header files are included, and users/platforms are expected
# to specify an appropriate `cc_library` to replace them.
#
# You tell bazel which `cc_library` provides the respective headers by
# configuring these `label_flag`s:
#
# # Specify the library that provides "pico_config_extra_headers.h"
# --@pico-sdk//bazel/config:PICO_CONFIG_EXTRA_HEADER=//my_proj:my_custom_headers
#
# # Specify the library that provides "pico_config_platform_headers.h"
# --@pico-sdk//bazel/config:PICO_CONFIG_PLATFORM_HEADER=//my_proj:my_custom_platform_headers
cc_library(
name = "generate_config_header",
hdrs = ["include/pico/config_autogen.h"],
includes = ["include"],
visibility = ["//:__subpackages__"],
deps = [
"//bazel/config:PICO_CONFIG_EXTRA_HEADER",
"//bazel/config:PICO_CONFIG_PLATFORM_HEADER",
],
)
genrule(
name = "empty_extra_headers_file",
outs = ["generated_extra_include/pico_config_extra_headers.h"],
cmd = "echo > $@",
cmd_bat = "copy NUL $@",
visibility = ["//visibility:private"],
)
cc_library(
name = "no_extra_headers",
hdrs = ["generated_extra_include/pico_config_extra_headers.h"],
includes = ["generated_extra_include"],
visibility = ["//visibility:private"],
)
# An empty stub, useful for label_flag flags that need to point to a library,
# but for some purposes the library needs to be a no-op.
cc_library(
name = "empty_cc_lib",
)