Merge pull request hathach#1521 from kilograham/rp2040_warning

Re-add some warning suppression for rp2040

Author: hathach

examples/device/cdc_dual_ports/src/main.c

@@ -55,17 +55,19 @@ int main(void)
 // with Serial0 as all lower case, Serial1 as all upper case
 static void echo_serial_port(uint8_t itf, uint8_t buf[], uint32_t count)
 {
+  uint8_t const case_diff = 'a' - 'A';
+
   for(uint32_t i=0; i<count; i++)
   {
     if (itf == 0)
     {
       // echo back 1st port as lower case
-      if (isupper(buf[i])) buf[i] += 'a' - 'A';
+      if (isupper(buf[i])) buf[i] += case_diff;
     }
     else
     {
       // echo back 2nd port as upper case
-      if (islower(buf[i])) buf[i] -= 'a' - 'A';
+      if (islower(buf[i])) buf[i] -= case_diff;
     }
 
     tud_cdc_n_write_char(itf, buf[i]);

examples/device/hid_composite/src/main.c

@@ -230,7 +230,7 @@ void tud_hid_report_complete_cb(uint8_t instance, uint8_t const* report, uint16_
   (void) instance;
   (void) len;
 
-  uint8_t next_report_id = report[0] + 1;
+  uint8_t next_report_id = report[0] + 1u;
 
   if (next_report_id < REPORT_ID_COUNT)
   {

examples/example.cmake

@@ -21,5 +21,11 @@ target_compile_options(${PROJECT} PUBLIC
         -Wuninitialized
         -Wunused
         -Wredundant-decls
+        )
+
+# GCC version 9 or prior has a bug with incorrect Wconversion warnings
+if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 10.0)
+  target_compile_options(${PROJECT} PUBLIC
         -Wconversion
         )
+endif()

hw/bsp/rp2040/family.cmake

@@ -150,11 +150,13 @@ if (NOT TARGET _rp2040_family_inclusion_marker)
 	function(family_configure_device_example TARGET)
 		family_configure_target(${TARGET})
 		target_link_libraries(${TARGET} PUBLIC pico_stdlib tinyusb_device)
+		suppress_tinyusb_warnings()
 	endfunction()
 
 	function(family_configure_host_example TARGET)
 		family_configure_target(${TARGET})
 		target_link_libraries(${TARGET} PUBLIC pico_stdlib tinyusb_host)
+		suppress_tinyusb_warnings()
 	endfunction()
 
 	function(family_add_pico_pio_usb TARGET)
@@ -165,6 +167,7 @@ if (NOT TARGET _rp2040_family_inclusion_marker)
 		family_configure_target(${TARGET})
 		# require tinyusb_pico_pio_usb
 		target_link_libraries(${TARGET} PUBLIC pico_stdlib tinyusb_device tinyusb_host tinyusb_pico_pio_usb )
+		suppress_tinyusb_warnings()
 	endfunction()
 
 	function(check_and_add_pico_pio_usb_support)
@@ -232,6 +235,31 @@ if (NOT TARGET _rp2040_family_inclusion_marker)
 
 	# This method must be called from the project scope to suppress known warnings in TinyUSB source files
 	function(suppress_tinyusb_warnings)
-		# there are currently no warnings to suppress, however this function must still exist
+		# some of these are pretty silly warnings only occurring in some older GCC versions 9 or prior
+		if (CMAKE_C_COMPILER_VERSION VERSION_LESS 10.0)
+  		set(CONVERSION_WARNING_FILES
+  				${PICO_TINYUSB_PATH}/src/tusb.c
+  				${PICO_TINYUSB_PATH}/src/common/tusb_fifo.c
+  				${PICO_TINYUSB_PATH}/src/device/usbd.c
+  				${PICO_TINYUSB_PATH}/src/device/usbd_control.c
+  				${PICO_TINYUSB_PATH}/src/host/usbh.c
+  				${PICO_TINYUSB_PATH}/src/class/cdc/cdc_device.c
+  				${PICO_TINYUSB_PATH}/src/class/cdc/cdc_host.c
+  				${PICO_TINYUSB_PATH}/src/class/hid/hid_device.c
+  				${PICO_TINYUSB_PATH}/src/class/hid/hid_host.c
+  				${PICO_TINYUSB_PATH}/src/class/audio/audio_device.c
+  				${PICO_TINYUSB_PATH}/src/class/dfu/dfu_device.c
+  				${PICO_TINYUSB_PATH}/src/class/dfu/dfu_rt_device.c
+  				${PICO_TINYUSB_PATH}/src/class/midi/midi_device.c
+  				${PICO_TINYUSB_PATH}/src/class/usbtmc/usbtmc_device.c
+  				${PICO_TINYUSB_PATH}/src/portable/raspberrypi/rp2040/hcd_rp2040.c
+  				)
+  		foreach(SOURCE_FILE IN LISTS CONVERSION_WARNING_FILES)
+  			set_source_files_properties(
+  					${SOURCE_FILE}
+  					PROPERTIES
+  					COMPILE_FLAGS "-Wno-conversion")
+  		endforeach()
+  	endif()
 	endfunction()
 endif()