https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115416
--- Comment #3 from YunQiang Su <syq at gcc dot gnu.org> --- Since it doesn't exist, why use --includedir with it? Anyway, so, maybe we should detect the existence of this dir. Can you have a try of this patch? --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -560,10 +560,11 @@ LINKER_PLUGIN_API_H = $(srcdir)/../include/plugin-api.h # Default native SYSTEM_HEADER_DIR, to be overridden by targets. NATIVE_SYSTEM_HEADER_DIR = @NATIVE_SYSTEM_HEADER_DIR@ # Default cross SYSTEM_HEADER_DIR, to be overridden by targets. -ifeq (@includedir@,$(prefix)/include) - CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@ -else - CROSS_SYSTEM_HEADER_DIR = @includedir@ +CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@ +ifneq (@includedir@,$(prefix)/include) + ifneq (,$(wildcard @includedir@)) + CROSS_SYSTEM_HEADER_DIR = @includedir@ + endif endif
