[PATCH] x86_64: Don't define string functions to builtin
gcc should handle this anyways, and it causes problems when
sprintf is turned into strcpy by gcc behind our backs and
the C fallback version of strcpy is actually defining __builtin_strcpy
Then drop -ffreestanding from the main Makefile because it isn't
needed anymore and implies -fno-builtin, which is wrong now.
(it was only added for x86-64, so dropping it should be safe)
Noticed by Roman Zippel
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/Makefile b/Makefile
index 7bc2f4a..af6210d 100644
--- a/Makefile
+++ b/Makefile
@@ -306,8 +306,7 @@
CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
- -fno-strict-aliasing -fno-common \
- -ffreestanding
+ -fno-strict-aliasing -fno-common
AFLAGS := -D__ASSEMBLY__
# Read KERNELRELEASE from .kernelrelease (if it exists)
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index ff6973a..c848a5b 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -39,6 +39,9 @@
cflags-$(CONFIG_REGPARM) += -mregparm=3
+# temporary until string.h is fixed
+cflags-y += -ffreestanding
+
# 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:
CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
diff --git a/include/asm-x86_64/string.h b/include/asm-x86_64/string.h
index a3493ee..ee6bf27 100644
--- a/include/asm-x86_64/string.h
+++ b/include/asm-x86_64/string.h
@@ -40,26 +40,15 @@
#define __HAVE_ARCH_MEMSET
-#define memset __builtin_memset
+void *memset(void *s, int c, size_t n);
#define __HAVE_ARCH_MEMMOVE
void * memmove(void * dest,const void *src,size_t count);
-/* Use C out of line version for memcmp */
-#define memcmp __builtin_memcmp
int memcmp(const void * cs,const void * ct,size_t count);
-
-/* out of line string functions use always C versions */
-#define strlen __builtin_strlen
size_t strlen(const char * s);
-
-#define strcpy __builtin_strcpy
-char * strcpy(char * dest,const char *src);
-
-#define strcat __builtin_strcat
-char * strcat(char * dest, const char * src);
-
-#define strcmp __builtin_strcmp
+char *strcpy(char * dest,const char *src);
+char *strcat(char * dest, const char * src);
int strcmp(const char * cs,const char * ct);
#endif /* __KERNEL__ */