[PATCH] uml: Avoid that gcc breaks UML with "unit at a time" compilation mode.

Avoid that gcc breaks UML with "unit at a time" compilation mode.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Makefile

@@ -61,6 +61,8 @@ CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
 	-D_LARGEFILE64_SOURCE $(ARCH_INCLUDE) -Derrno=kernel_errno \
 	-Dsigprocmask=kernel_sigprocmask $(MODE_INCLUDE)
 
+CFLAGS += $(call check_gcc,-fno-unit-at-a-time,)
+
 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 
 # These are needed for clean and mrproper, since in that case .config is not