(Public Domain) Get C preprocessor macro inside of Makefile

importmacro.mk

# You may use this anywhere, if you link back to this page.

# Usage:
#   $(call getMacro header.h MY_MAC %s)
# The macro will be 0 when it is undefined

# "Parse" C header, converting C macro to Make macro
# See https://gist.github.com/petabyt/898d3437decf65fc04fc50bd0e125362
define importMacro
    $(shell echo "#include <stdio.h>\n \
        #ifndef $(2)\n \
        #define $(2) 0\n \
        #endif\n \
        int main() {printf(\"$(2)=$(3)\", $(2));return 0;}" > MakefileImportMacro.c)
    $(shell $(CC) -include $(1) MakefileImportMacro.c -o MakefileImportMacro.o)
	$(eval $(shell ./MakefileImportMacro.o))
    $(shell $(RM) MakefileImportMacro.c MakefileImportMacro.o)
endef

# Usage Example
all:
	@$(call getMacro, ../model/xf1.h, MODEL_NAME, %s)
	@echo $(MODEL_NAME)