diff options
Diffstat (limited to 'builddefs/common_rules.mk')
-rw-r--r-- | builddefs/common_rules.mk | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/builddefs/common_rules.mk b/builddefs/common_rules.mk index 52dccbe475..ddd36409a7 100644 --- a/builddefs/common_rules.mk +++ b/builddefs/common_rules.mk @@ -15,6 +15,13 @@ VPATH := # Helper to return the distinct elements of a list uniq = $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1))) +cc-option = $(shell \ + if $(CC) $(1) -shared -o /dev/null -xc /dev/null > /dev/null 2>&1; \ + then echo "$(1)"; else echo "$(2)"; fi) + +# helper to pass comma character to make functions +, := , + # Convert all SRC to OBJ define OBJ_FROM_SRC $(patsubst %.c,$1/%.o,$(patsubst %.cpp,$1/%.o,$(patsubst %.cc,$1/%.o,$(patsubst %.S,$1/%.o,$(patsubst %.clib,$1/%.a,$($1_SRC)))))) @@ -66,9 +73,7 @@ CFLAGS += $(CDEFS) CFLAGS += -O$(OPT) # add color ifeq ($(COLOR),true) -ifeq ("$(shell echo "int main(){}" | $(CC) -fdiagnostics-color -x c - -o /dev/null 2>&1)", "") - CFLAGS+= -fdiagnostics-color -endif + CFLAGS+= $(call cc-option, -fdiagnostics-color) endif CFLAGS += -Wall CFLAGS += -Wstrict-prototypes |