[OE-core] [PATCH] kernel.bbclass: set LD in KERNEL_CONFIG_COMMAND to fix 5.4+ builds when gold is enabled

[Martin Jansa]

* with 5.4 kernel the do_configure fails when gold is enabled (with ld-is-gold in DISTRO_FEATURES)
* bfd is already being set in KERNEL_LD:
  kernel-arch.bbclass:KERNEL_LD = "${CCACHE}${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
  but KERNEL_LD is currently respected only by do_compile and do_compile_kernel modules
  and new kernel which contains a check for gold in Kbuild:
  https://lore.kernel.org/lkml/alpine.DEB.2.21.1907161434260.1767@nanos.tec.linutronix.de/
  more details:
  https://lore.kernel.org/r/CAMe9rOqMqkQ0LNpm25yE_Yt0FKp05WmHOrwc0aRDb53miFKM+w@mail.gmail.com
  will fail during the configuration even when gold wouldn't be used to
  build it in the end, add LD setting to KERNEL_CONFIG_COMMAND to prevent
  premature error when configuring

  scripts/kconfig/conf  --olddefconfig Kconfig
  scripts/Kconfig.include:39:  gold linker 'x86_64-oe-linux-ld' not supported
  make[2]: *** [/OE/build/oe-core/tmp-glibc/work-shared/qemux86-64/kernel-source/scripts/kconfig/Makefile:73: olddefconfig] Error 1

Signed-off-by: Martin Jansa <Martin.Jansa at gmail.com>
---
 meta/classes/kernel.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index ebe5378301..1a953dca35 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -507,7 +507,7 @@ sysroot_stage_all () {
 	:
 }
 
-KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} CC="${KERNEL_CC}" O=${B} olddefconfig || oe_runmake -C ${S} O=${B} CC="${KERNEL_CC}" oldnoconfig"
+KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} CC="${KERNEL_CC}" LD="${KERNEL_LD}" O=${B} olddefconfig || oe_runmake -C ${S} O=${B} CC="${KERNEL_CC}" LD="${KERNEL_LD}" oldnoconfig"
 
 python check_oldest_kernel() {
     oldest_kernel = d.getVar('OLDEST_KERNEL')
-- 
2.20.1