Do not pass -Wno-pointer-sign if not supported

diff --git a/xen-hooks.mak b/xen-hooks.mak
index ec3a1df7265345ec76dde9fb48d877c8bef5196a..e1894241aca891baf9b2e11d829b5a84c65fa625 100644 (file)
--- a/xen-hooks.mak
+++ b/xen-hooks.mak
@@ -10,8 +10,11 @@ endif
 
 QEMU_PROG=qemu-dm
 
-CFLAGS += -Wno-unused -Wno-declaration-after-statement \
- -Wno-pointer-sign
+CFLAGS += -Wno-unused -Wno-declaration-after-statement
+
+ifeq (,$(shell $(CC) -Wno-pointer-sign -E - </dev/null >/dev/null || echo x))
+CFLAGS += -Wno-pointer-sign
+endif 
 
 CFLAGS += $(CMDLINE_CFLAGS)