[OE-core] [PATCH 5/8] [linux-libc-headers] allow overriding compiler name in KConfig

[Khem Raj]

> On Aug 23, 2016, at 6:39 AM, Bruce Ashfield <bruce.ashfield at gmail.com> wrote:
> 
> 
> 
> On Tue, Aug 23, 2016 at 3:25 AM, Jérémy Rosen <jeremy.rosen at smile.fr <mailto:jeremy.rosen at smile.fr>> wrote:
> 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-libc-headers/linux-libc-headers.inc                                                             |  7 ++++++-
>  meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-Allow-overriding-host-compiler-name-from-environment.patch | 32 ++++++++++++++++++++++++++++++++
>  2 files changed, 38 insertions(+), 1 deletion(-)
>  create mode 100644 meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-Allow-overriding-host-compiler-name-from-environment.patch
> 
> diff --git a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers.inc b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers.inc
> index 92acf8a..18bd080 100644
> --- a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers.inc
> +++ b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers.inc
> @@ -46,7 +46,9 @@ inherit kernel-arch
> 
>  KORG_ARCHIVE_COMPRESSION ?= "xz"
> 
> -SRC_URI = "${KERNELORG_MIRROR}/linux/kernel/v${HEADER_FETCH_VER}/linux-${PV}.tar.${KORG_ARCHIVE_COMPRESSION}"
> +SRC_URI = "${KERNELORG_MIRROR}/linux/kernel/v${HEADER_FETCH_VER}/linux-${PV}.tar.${KORG_ARCHIVE_COMPRESSION} \
> +           file://0001-Allow-overriding-host-compiler-name-from-environment.patch \
> +           "
> 
> 
> We shouldn't be patching linux-libc-headers, and much less with a build patch like this. libc-headers
> are the c libraries interface to the kernel. If something is building against the kernel itself, it needs
> to go against the kernel source.
> 
> If this is broken, it needs to be fixed upstream.

I agree. now a days we have more than gcc available as system C compiler perhaps your patch might be upstream worthy.

> 
> But like the kernel patch, I can't tell exactly what problem you are trying to fix. Can you be more
> specific ?
> 
> Bruce
> 
>  S = "${WORKDIR}/linux-${PV}"
> 
> @@ -77,3 +79,6 @@ RRECOMMENDS_${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
> 
>  INHIBIT_DEFAULT_DEPS = "1"
>  DEPENDS += "unifdef-native"
> +
> +export HOSTCC="${BUILD_CC}"
> +export HOSTCXX="${BUILD_CXX}"
> diff --git a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-Allow-overriding-host-compiler-name-from-environment.patch b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-Allow-overriding-host-compiler-name-from-environment.patch
> new file mode 100644
> index 0000000..6fcfbc8
> --- /dev/null
> +++ b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/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 <mailto: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
> --
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> 
> 
> --
> "Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end"
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