[oe] [Jethro] Can't compile gcc-cross when gcc-6 is the host compiler

[Khem Raj]

On 16-08-12 15:38:52, Jérémy Rosen wrote:
> 
> 
> On 11/08/2016 21:38, Burton, Ross wrote:
> >On 11 August 2016 at 13:40, Jérémy Rosen <jeremy.rosen at smile.fr> wrote:
> >
> >>This helped, and allowed me to go much further in my build, but the recipe
> >>gcc-cross-arm still failed. To be able to compile my build I had to add the
> >>following to my local.conf
> >>
> >>CC_pn-gcc-cross-arm= "${BUILD_CC}"
> >>CXX_pn-gcc-cross-arm= "${BUILD_CXX}"
> >>CC_pn-gcc-crosssdk-x86_64= "${BUILD_CC}"
> >>CXX_pn-gcc-crosssdk-x86_64= "${BUILD_CXX}"
> >>
> >>
> >>So apparently, gcc still has some reference to $CC and $CXX hardcoded
> >>somewhere (I think it's in do_configure)
> >>
> >>It seems to set $CC in the do_compile correctly, but not in do_configure.
> >>And it never sets $CXX
> >>
> >>I tried to understand what the GCC recipe was doing wrong, but I couldn't
> >>find out on first look and it's a really complicated recipe
> >>
> >Could you try adding a do_configure_prepend to gcc-cross.inc that sets
> >exports those (and extend the do_compile exports) to see if that solves it?
> 
> I did the following
> 
> diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc
> b/meta/recipes-devtools/gcc/gcc-cross.inc
> index aa10633..9a2e06f 100644
> --- a/meta/recipes-devtools/gcc/gcc-cross.inc
> +++ b/meta/recipes-devtools/gcc/gcc-cross.inc
> @@ -36,8 +36,14 @@ EXTRA_OECONF_PATHS = "\
> 
>  ARCH_FLAGS_FOR_TARGET +=
> "-isystem${STAGING_DIR_TARGET}${target_includedir}"
> 
> +do_configure_prepend () {
> +    export CC="${BUILD_CC}"
> +    export CXX="${BUILD_CXX}"
> +}
> +
>  do_compile () {
>      export CC="${BUILD_CC}"
> +    export CXX="${BUILD_CXX}"
>      export AR_FOR_TARGET="${TARGET_SYS}-ar"
>      export RANLIB_FOR_TARGET="${TARGET_SYS}-ranlib"
>      export LD_FOR_TARGET="${TARGET_SYS}-ld"
> 
> 
> (which I think is what you meant) and it did indeed solve the problem.

this looks ok.