[POWERPC] detect how to call nm for xen-syms.S

Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

diff --git a/xen/arch/powerpc/Makefile b/xen/arch/powerpc/Makefile
index 0a338a96dd7d81541bc45ea2b5b29d20a5f1a382..c37a307f1c9b83be1180efe0ffecef8615a4f0bf 100644 (file)
--- a/xen/arch/powerpc/Makefile
+++ b/xen/arch/powerpc/Makefile
@@ -101,8 +101,15 @@ TARGET_OPTS += start.o $(ALL_OBJS)
 .xen-syms: start.o $(ALL_OBJS) xen.lds
        $(CC) $(CFLAGS) $(TARGET_OPTS) -o $@
 
+NM=$(CROSS_COMPILE)nm
+new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
+
+ifeq ($(new_nm),y)
+NM             := $(NM) --synthetic
+endif
+
 xen-syms.S: .xen-syms
-       $(CROSS_COMPILE)nm --synthetic -n $^ | $(BASEDIR)/tools/symbols > $@
+       $(NM) -n $^ | $(BASEDIR)/tools/symbols > $@
 
 xen-syms.o: xen-syms.S
        $(CC) $(CFLAGS) -D__ASSEMBLY__ -c $< -o $@