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Re: [PATCH v2] ARM: Use different linker path for hardfloat ABI

From: Jeff Law <law at redhat dot com>
To: Michael Hope <michael dot hope at linaro dot org>
Cc: Richard Earnshaw <rearnsha at arm dot com>, "Carlos O'Donell" <carlos at systemhalted dot org>, GCC Patches <gcc-patches at gcc dot gnu dot org>, "cross-distro at lists dot linaro dot org" <cross-distro at lists dot linaro dot org>, "libc-ports at sourceware dot org" <libc-ports at sourceware dot org>
Date: Mon, 30 Apr 2012 21:44:22 -0600
Subject: Re: [PATCH v2] ARM: Use different linker path for hardfloat ABI
References: <CANLjY-kZ6FakmtKkHjjC2YNgCBkydiNq8F81Fb7SgW0RE6iF5w@mail.gmail.com> <4F9576DE.9070608@arm.com> <CANLjY-=y8pnK2jJZ+mo212o=5b0yOMgvy5G=WhoKnJX_mOV1CQ@mail.gmail.com> <CADZpyixYZAGYv=i=Xe4fefcBsxqPb3onaC1RGnfzGJnRX+MF4Q@mail.gmail.com> <CANLjY-m8udADuOo1gMfR9NWa-iw_JHbtnsoRAF1of1cvzdxSTg@mail.gmail.com> <4F9EAE9D.3040509@arm.com> <CANLjY-nhVTqr1_xrM7NpyOnyWYZkT4hpWZJb2VKDAGVvSaf8Aw@mail.gmail.com> <4F9F0B9F.1040403@redhat.com> <CANLjY-kGg4T7WcZe6czWXzi-82Wg-DTKRDV-wMMb0mP8xaFEeA@mail.gmail.com>

On 04/30/2012 08:43 PM, Michael Hope wrote:

On 1 May 2012 10:01, Jeff Law<law@redhat.com> wrote:

On 04/30/2012 03:47 PM, Michael Hope wrote:

2012-04-27 Michael Hope<michael.hope@linaro.org>

       * config/arm/linux-eabi.h (GLIBC_DYNAMIC_LINKER): Pick the loader
       using a spec rule.

Michael,

can you try this patch please.  It should make it possible to then
create linux-eabihf.h containing just

#undef TARGET_DEFAULT_FLOAT_ABI
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
#undef GLIBC_DYNAMIC_LINKER_DEFAULT
#define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_HARD_FLOAT

Which is not quite as simple as leaving out the second re-define, but
pretty close.

Hi Richard.  Your patch tests just fine.  I like it.  You could change
the spec rule to the newer if-elseif-else form but that's a nit.


So who owns creating the appropriate glibc patch now that we've got a good
gcc patch?


Carlos is working on the GLIBC patch:
  http://sourceware.org/ml/libc-ports/2012-04/msg00171.html

Ah, not on the main glibc list... That's why I missed it. Thanks.

jeff

References:
- Re: [PATCH v2] ARM: Use different linker path for hardfloat ABI
  - From: Michael Hope

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