[oe-commits] Khem Raj : kernel-arch: Force BFD kernel when using gcc for linking

[git at git.openembedded.org]

Module: openembedded-core.git
Branch: master-next
Commit: 5724e4d245f142ac6fb1ea211503fd220683354d
URL:    http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=5724e4d245f142ac6fb1ea211503fd220683354d

Author: Khem Raj <raj.khem at gmail.com>
Date:   Wed Aug 19 10:44:56 2015 -0700

kernel-arch: Force BFD kernel when using gcc for linking

We redefine LD to point to ld.bfd when building kernel, which works in
most cases since kbuild system calls out for bare LD most of the time,
however some of newer kernels e.g. 4.1+ have some code added which can
call gcc directly to do the linking job e.g. arm vdso code

This causes build failures when we have configured the default cross
toolchain to use gold linker as default. Errors like

BFD: arch/arm/vdso/vdso.so: Not enough room for program headers, try
linking with -N
| arm-angstrom-linux-gnueabi-objcopy:arch/arm/vdso/vdso.so[.hash]: Bad
value

start happening.

With this patch we force gcc to choose bfd linker as well

Signed-off-by: Khem Raj <raj.khem at gmail.com>
Signed-off-by: Ross Burton <ross.burton at intel.com>

---

 meta/classes/kernel-arch.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/kernel-arch.bbclass b/meta/classes/kernel-arch.bbclass
index 6650870..211b72b 100644
--- a/meta/classes/kernel-arch.bbclass
+++ b/meta/classes/kernel-arch.bbclass
@@ -53,7 +53,7 @@ HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"
 TARGET_AR_KERNEL_ARCH ?= ""
 HOST_AR_KERNEL_ARCH ?= "${TARGET_AR_KERNEL_ARCH}"
 
-KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH}"
+KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH} -fuse-ld=bfd"
 KERNEL_LD = "${CCACHE}${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
 KERNEL_AR = "${CCACHE}${HOST_PREFIX}ar ${HOST_AR_KERNEL_ARCH}"