fix warnings cast function type for nrf, fix pico osal warning

add TODO for overflow in tusb_fifo.c

examples/make.mk

@@ -88,6 +88,7 @@ CFLAGS += \
   -fno-strict-aliasing \
   -Wdouble-promotion \
   -Wstrict-prototypes \
+  -Wstrict-overflow \
   -Wall \
   -Wextra \
   -Werror \
@@ -100,7 +101,8 @@ CFLAGS += \
   -Wsign-compare \
   -Wmissing-format-attribute \
   -Wunreachable-code \
-  -Wcast-align
+  -Wcast-align \
+  -Wcast-function-type
 
 # Debugging/Optimization
 ifeq ($(DEBUG), 1)

hw/bsp/nrf/family.c

@@ -55,6 +55,11 @@ static nrfx_uarte_t _uart_id = NRFX_UARTE_INSTANCE(0);
 // We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled.
 extern void tusb_hal_nrf_power_event(uint32_t event);
 
+static void power_event_handler(nrfx_power_usb_evt_t event)
+{
+  tusb_hal_nrf_power_event((uint32_t) event);
+}
+
 void board_init(void)
 {
   // stop LF clock just in case we jump from application without reset
@@ -121,7 +126,7 @@ void board_init(void)
 
     // Register tusb function as USB power handler
     // cause cast-function-type warning
-    const nrfx_power_usbevt_config_t config = { .handler = ((nrfx_power_usb_event_handler_t) tusb_hal_nrf_power_event) };
+    const nrfx_power_usbevt_config_t config = { .handler = power_event_handler };
     nrfx_power_usbevt_init(&config);
 
     nrfx_power_usbevt_enable();

src/common/tusb_fifo.c

@@ -325,6 +325,8 @@ static uint16_t advance_pointer(tu_fifo_t* f, uint16_t p, uint16_t offset)
   // We limit the index space of p such that a correct wrap around happens
   // Check for a wrap around or if we are in unused index space - This has to be checked first!!
   // We are exploiting the wrap around to the correct index
+
+  // TODO warning: assuming signed overflow does not occur when assuming that (X + c) < X is always false [-Wstrict-overflow]
   if ((p > p + offset) || (p + offset > f->max_pointer_idx))
   {
     p = (p + offset) + f->non_used_index_space;

src/osal/osal_pico.h

@@ -57,6 +57,7 @@ static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semde
 
 static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr)
 {
+  (void) in_isr;
   sem_release(sem_hdl);
   return true;
 }
@@ -158,6 +159,7 @@ static inline bool osal_queue_send(osal_queue_t qhdl, void const * data, bool in
   //  however osal_queue_recieve may be. therefore my assumption is that
   //  the fifo mutex is not populated for queues used from an IRQ context
   //assert(!qhdl->ff.mutex);
+  (void) in_isr;
 
   _osal_q_lock(qhdl);
   bool success = tu_fifo_write(&qhdl->ff, data);