commit 5ff9c81b6c0f23dfbc08c95c1294b3b37110ecf0
author Alistair Strachan <alistair.strachan@imgtec.com> Thu May 05 16:29:08 2016 -0700
committer Alistair Strachan <alistair.strachan@imgtec.com> Thu May 05 16:29:08 2016 -0700
tree 8520642d76b186e136728ed0ad082ee005afc2e7
parent c9778e339d936be09f4415413538617c64734967

Avoid accidentally using the host's native 'as' command.

When invoking clang for the host to assemble .S files, the -B flag
would not be provided, which allowed the host prebuilt clang to
use an 'as' from the native environment. Most of the time this
"just works", but some newer 'as' versions cause problems with
the older prebuilt toolchain, for example by generating
unsupported relocation types.

To avoid this problem, simply use the -B flag to tell clang to
invoke the assembler from the correct prebuilt gcc prefix.

Change-Id: I18ea4f37ae637b652cfd7321c41929f8be075342
Signed-off-by: Alistair Strachan <alistair.strachan@imgtec.com>

core/clang/HOST_x86_common.mk

diff --git a/core/clang/HOST_x86_common.mk b/core/clang/HOST_x86_common.mk
index 0f4d4a2..1344eae 100644
--- a/core/clang/HOST_x86_common.mk
+++ b/core/clang/HOST_x86_common.mk
@@ -13,7 +13,8 @@
 ifeq ($(HOST_OS),linux)
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
-  --sysroot $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot
+  --sysroot $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
+  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin
 
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)