[yocto] [PATCH 1/5] gcc: Add gcc configure for PowerPC e500v2/SPE embedded floating point ABI

[Khem Raj]

On Mon, Jul 18, 2011 at 10:21 PM, Kumar Gala <galak at kernel.crashing.org> wrote:
> The e500v2 core utilizes a unique floating point programming model / ABI.
> We utilize TARGET_FPU = "spe" to distinguish this choice.  When building
> the toolchain for this ABI we need configure gcc with --enable-e500_double.
>
> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
> ---
>  meta/recipes-devtools/gcc/gcc-4.6.inc    |    2 +-
>  meta/recipes-devtools/gcc/gcc-common.inc |    2 ++
>  2 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/meta/recipes-devtools/gcc/gcc-4.6.inc b/meta/recipes-devtools/gcc/gcc-4.6.inc
> index 56064b5..b719155 100644
> --- a/meta/recipes-devtools/gcc/gcc-4.6.inc
> +++ b/meta/recipes-devtools/gcc/gcc-4.6.inc
> @@ -1,6 +1,6 @@
>  require gcc-common.inc
>
> -PR = "r8"
> +PR = "r9"
>
>  # Third digit in PV should be incremented after a minor release
>  # happens from this branch on gcc e.g. currently its 4.6.0
> diff --git a/meta/recipes-devtools/gcc/gcc-common.inc b/meta/recipes-devtools/gcc/gcc-common.inc
> index 7bf036c..409ad01 100644
> --- a/meta/recipes-devtools/gcc/gcc-common.inc
> +++ b/meta/recipes-devtools/gcc/gcc-common.inc
> @@ -12,6 +12,8 @@ FILESDIR = "${@os.path.dirname(bb.data.getVar('FILE',d,1))}/gcc-${PV}"
>  def get_gcc_fpu_setting(bb, d):
>     if bb.data.getVar('TARGET_FPU', d, 1) in [ 'soft' ]:
>         return "--with-float=soft"
> +    if bb.data.getVar('TARGET_FPU', d, 1) in [ 'spe' ]:
> +        return "--enable-e500_double"
>     return ""
>

this will enable e500_double even for e500v1 which IIRC does not have
DFP support
have you tried building for e500v1 with this ?

>  def get_gcc_mips_plt_setting(bb, d):
> --
> 1.7.3.4
>
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