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Re: Darwin bootstrap failure following wide int merge (was: we are starting the wide int merge)
- From: Richard Biener <richard dot guenther at gmail dot com>
- To: FX <fxcoudert at gmail dot com>
- Cc: GCC Development <gcc at gcc dot gnu dot org>, glisse at gcc dot gnu dot org, Richard Sandiford <rdsandiford at googlemail dot com>, Mike Stump <mikestump at comcast dot net>, Kenneth Zadeck <zadeck at naturalbridge dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>, Gerald Pfeifer <gerald at pfeifer dot com>
- Date: Mon, 26 May 2014 11:41:08 +0200
- Subject: Re: Darwin bootstrap failure following wide int merge (was: we are starting the wide int merge)
- Authentication-results: sourceware.org; auth=none
- References: <97BE9F46-EB35-4B06-9065-915D7259E701 at gmail dot com>
On Mon, May 26, 2014 at 10:14 AM, FX <firstname.lastname@example.org> wrote:
>> > .././../gcc-4.10-20140518/gcc/wide-int.cc:1274:23: error: invalid use of a
>> > cast in a inline asm context requiring an l-value: remove the cast or
>> > build with -fheinous-gnu-extensions
>> > umul_ppmm (val, val, op1.ulow (), op2.ulow ());
>> > ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> This is PR 61146. You can get around it by adding -fheinous-gnu-extensions
>> to BOOT_CFLAGS.
> This causes GCC bootstrap to fail on Darwin systems (whose system compiler is clang-based). Since PR 61146 was resolved as INVALID (but Iâm not sure itâs the right call, see below), Iâve filed a separate report for the bootstrap issue (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61315).
> Regarding PR 61146, I agree with Marc Glisse (comment #3) that the casts in question look weird and should probably be removed, as was done in GMP. This code should be cleaned up, and it will fix bootstrap on clang-based target coincidentally, without adding another kludge.
Please post a patch.