[RFC] gcc linker path for armhf

[Andrew Stubbs]

On 05/10/11 17:54, Loïc Minier wrote:
> On Wed, Oct 05, 2011, dann frazier wrote:
>> At this point I'd like to submit both patches as an RFC. I suspect the
>> static patch might be fine (and safest) for distributions like Debian
>> that don't yet enable bi-arch on armhf, but not for distros like
>> Ubuntu which do. The dynamic version should work in the bi-arch case,
>> but it also will change the default linker path for soft-float
>> binaries and I suspect we *don't* want to do that. Perhaps we need to
>> #ifdef that out somehow if we're building for a soft-float default
>> target?
>
>> -   -dynamic-linker " LINUX_DYNAMIC_LINKER " \
>> +   %{msoft-float:-dynamic-linker " GLIBC_DYNAMIC_LINKEREL "} \
>> +   %{mfloat-abi=soft*:-dynamic-linker " GLIBC_DYNAMIC_LINKEREL "} \
>> +   %{mhard-float:-dynamic-linker " GLIBC_DYNAMIC_LINKERHF "} \
>> +   %{mfloat-abi=hard:-dynamic-linker " GLIBC_DYNAMIC_LINKERHF "} \
>
>   There's an unfortunate issue with spec files which will prevent the
>   biarch case from supporting -mhard-float/-msoft-float along
>   -mfloat-abi in the near term:
>   http://lists.linaro.org/pipermail/linaro-toolchain/2011-March/000964.html
>
>   Otherwise, looks good to me; thanks for the patches

Perhaps something like this?

   %:arm_choose_dynamic_linker(%{msoft-float&mhard-float&mfloat-abi=*})

And then implement arm_choose_dynamic_linker in driver-arm.c (which 
doesn't yet exist for arm, but will once my native tuning patch is 
approved).

Andrew