[OE-core] [PATCH 4/8] [linux-yocto] allow overriding compiler name in KConfig

[Jérémy Rosen]

The KConfig infrastructure hardwires the compiler name to gcc, which breaks
the BUILD_CC feature. This is needed even when cross compiling because
make *config rely on the kconfig infrastructure
---
 meta/recipes-kernel/linux/linux-yocto.inc                                                             |  4 ++++
 meta/recipes-kernel/linux/linux-yocto/0001-Allow-overriding-host-compiler-name-from-environment.patch | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 0 deletions(-)
 create mode 100644 meta/recipes-kernel/linux/linux-yocto/0001-Allow-overriding-host-compiler-name-from-environment.patch

diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 98a48ec..63c1531 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -58,3 +58,7 @@ do_install_append(){
 addtask kernel_link_images after do_compile before do_install
 addtask validate_branches before do_patch after do_kernel_checkout
 addtask kernel_configcheck after do_configure before do_compile
+
+SRC_URI_append = " file://0001-Allow-overriding-host-compiler-name-from-environment.patch"
+export HOSTCC = "${BUILD_CC}"
+export HOSTCXX = "${BUILD_CXX}"
diff --git a/meta/recipes-kernel/linux/linux-yocto/0001-Allow-overriding-host-compiler-name-from-environment.patch b/meta/recipes-kernel/linux/linux-yocto/0001-Allow-overriding-host-compiler-name-from-environment.patch
new file mode 100644
index 0000000..6fcfbc8
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-yocto/0001-Allow-overriding-host-compiler-name-from-environment.patch
@@ -0,0 +1,32 @@
+From 0ce4c4f29b5d456a7707e870c7affe524f7c8807 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Rosen?= <jeremy.rosen at smile.fr>
+Date: Tue, 16 Aug 2016 22:39:29 +0200
+Subject: [PATCH] Allow overriding host-compiler name from environment
+ variables
+
+---
+ Makefile | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 70dea02..1f0d2d2 100644
+--- a/Makefile
++++ b/Makefile
+@@ -295,10 +295,10 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
+ 	  else if [ -x /bin/bash ]; then echo /bin/bash; \
+ 	  else echo sh; fi ; fi)
+ 
+-HOSTCC       = gcc
+-HOSTCXX      = g++
+-HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
+-HOSTCXXFLAGS = -O2
++HOSTCC       ?= gcc
++HOSTCXX      ?= g++
++HOSTCFLAGS   ?= -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
++HOSTCXXFLAGS ?= -O2
+ 
+ ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
+ HOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
+-- 
+2.8.1
+
-- 
git-series 0.8.9