CFLAGS += -fno-strict-aliasing
# add color
ifeq ($(COLOR),true)
-ifeq ("$(shell echo "int main(){}" | $(CC) -fdiagnostics-color -x c - -o /dev/null 2>&1)", "")
+ifeq ("$(echo "int main(){}" | $(CC) -fdiagnostics-color -x c - -o /dev/null 2>&1)", "")
CFLAGS+= -fdiagnostics-color
-else ifeq ("$(shell echo "int main(){}" | $(CC) -fcolor-diagnostics -x c - -o /dev/null 2>&1)", "")
+else ifeq ("$(echo "int main(){}" | $(CC) -fcolor-diagnostics -x c - -o /dev/null 2>&1)", "")
CFLAGS+= -fcolor-diagnostics
endif
endif