[linux-yocto] [PATCH 04/14] lto: Disable LTO for hweight functions

[Alejandro Hernandez]

From: Andi Kleen <ak at linux.intel.com>

x86 calls the hweight library functions with special calling conventions.
LTO doesn't support compiling individual files with special options.
Just disable LTO for the file.

Signed-off-by: Andi Kleen <ak at linux.intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi at linux.intel.com>
---
 lib/Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index 7f1de26..ef14bc5 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -59,7 +59,9 @@ obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
 obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
 
 GCOV_PROFILE_hweight.o := n
-CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))
+CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS)) \
+		   $(DISABLE_LTO)
+
 obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
 
 obj-$(CONFIG_BTREE) += btree.o
-- 
2.6.6