Apply CFLAGS to user source code only

nicolas · ‎Dec 03, 2021

Hello,

I am using ModusToolbox build system in the IDE mode.

Is there a way in the Makefile to make the CFLAGS to be applied only to user (my) source code files, and not to all the framework source files ?

Regards

Nicolas

Rakshith · ‎Dec 03, 2021

Hi @nicolas,

You could try following the steps mentioned in this thread - Compile option settings for one file or follow the steps mentioned below -

Edit the application Makefile, by appending the following code snippet to the end of the Makefile (after the line with "include $(CY_TOOLS_DIR)/make/start.mk"):

define CY_MACRO_CUSTOM_CFLAGS

$(filter %$(1:%.c=%.o),$(CY_BUILD_ALL_OBJ_FILES)): $(filter %$(1),$(CY_SEARCH_APP_SOURCE) $(SOURCES))

$$(info $$(CY_INDENT)Compiling file $$(CY_COMPILE_PRINT) with $(2))

$$(CY_NOISE)$$(CY_BUILD_COMPILE_C) $$@ $$< $(2)

endef

ifneq ($(CY_SECONDSTAGE),)

$(eval $(call CY_MACRO_CUSTOM_CFLAGS,main.c,-Wextra -Werror))

endif

The snippet above defines the additional C compiler flags: "-Wextra -Werror" for a single file main.c

Please let me know if this works.

Thanks and Regards,
Rakshith M B

View solution in original post

Rakshith · ‎Dec 03, 2021

Hi @nicolas,

You could try following the steps mentioned in this thread - Compile option settings for one file or follow the steps mentioned below -

Edit the application Makefile, by appending the following code snippet to the end of the Makefile (after the line with "include $(CY_TOOLS_DIR)/make/start.mk"):

define CY_MACRO_CUSTOM_CFLAGS

$(filter %$(1:%.c=%.o),$(CY_BUILD_ALL_OBJ_FILES)): $(filter %$(1),$(CY_SEARCH_APP_SOURCE) $(SOURCES))

$$(info $$(CY_INDENT)Compiling file $$(CY_COMPILE_PRINT) with $(2))

$$(CY_NOISE)$$(CY_BUILD_COMPILE_C) $$@ $$< $(2)

endef

ifneq ($(CY_SECONDSTAGE),)

$(eval $(call CY_MACRO_CUSTOM_CFLAGS,main.c,-Wextra -Werror))

endif

The snippet above defines the additional C compiler flags: "-Wextra -Werror" for a single file main.c

Please let me know if this works.

Thanks and Regards,
Rakshith M B

nicolas · ‎Dec 05, 2021

Hello Rakshith,

Thanks for your help.

Unfortunately this is not working for me. Some of the variables seems to be empty (CY_COMPILE_PRINT), log from the build is"Compiling file with -Wextra -Werror".
Also added an echo of the CY_BUILD_COMPILE_C after the eval but it does not include the additionals CFLAGS. Checked also the main.c compilation line in the log but extra CFLAGS are not there.

I got a "sources" directory at the same level of the Makefile (I tried also "sources/main.c" instead of "main.c" in your proposal), I would need to be able to add extra flags to all the source files recursively in that folder.

Regards

Nicolas