uml: fix gcc problem
authorIngo Molnar <mingo@elte.hu>
Thu, 1 May 2008 10:06:54 +0000 (12:06 +0200)
committerIngo Molnar <mingo@elte.hu>
Sun, 4 May 2008 18:04:45 +0000 (20:04 +0200)
this is what caused gcc 4.3 to throw an internal error when
OPTIMIZE_INLINING was enabled ...

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/um/Makefile

index dbeab15e7bb7c160db7dda887a4c9d14982f742c..01b97c19a8ba99da4a07db8194397b1611b265e6 100644 (file)
@@ -77,7 +77,10 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
                         -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
 KBUILD_CFLAGS += $(KERNEL_DEFINES)
-KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
+# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+# a lot more stack due to the lack of sharing of stacklots:
+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
+                       echo $(call cc-option,-fno-unit-at-a-time); fi ;)
 
 PHONY += linux