From: "Moore, Catherine" <Catherine_Moore@mentor.com>
To: Matthew Fortune <Matthew.Fortune@imgtec.com>
Cc: "'gcc-patches@gcc.gnu.org' (gcc-patches@gcc.gnu.org)"
<gcc-patches@gcc.gnu.org>
Subject: RE: [MIPS] Re-enable ABI->ISA inference
Date: Wed, 14 Jan 2015 00:44:00 -0000 [thread overview]
Message-ID: <FD3DCEAC5B03E9408544A1E416F112420189146139@NA-MBX-04.mgc.mentorg.com> (raw)
In-Reply-To: <6D39441BF12EF246A7ABCE6654B0235320F95F07@LEMAIL01.le.imgtec.org>
> -----Original Message-----
> From: Matthew Fortune [mailto:Matthew.Fortune@imgtec.com]
> Sent: Monday, January 05, 2015 6:09 PM
> To: Moore, Catherine
> Cc: 'gcc-patches@gcc.gnu.org' (gcc-patches@gcc.gnu.org)
> Subject: [MIPS] Re-enable ABI->ISA inference
>
> The R6 patch introduced MIPS_ISA_LEVEL_SPEC into DRIVER_SELF_SPECS for
> all configurations. One part of MIPS_ISA_LEVEL_SPEC is however
> incompatible with those configurations which infer an ISA from an ABI
> without specifically setting the default ISAs using --with-arch-[32|64].
>
> I.e. a generic mips-linux (--enable-targets=all) and mips64-linux would fail to
> build the n32/n64 multilibs as -mips1 would be introduced by
> DRIVER_SELF_SPECS.
>
> I have therefore split MIPS_ISA_LEVEL_SPEC into two. One part is suitable
> for all confgurations and one part is only suitable for configurations that infer
> an ABI from an ISA (these tend to be cross-compiler vendor configurations)
>
> I have built and checked the driver generated options for all relevant
> configurations and everything appears to work.
>
> Let me know if you can see any problems with this?
>
> Thanks,
> Matthew
>
> gcc/
>
> * config/mips/mips.h (MIPS_ISA_LEVEL_SPEC): Only infer an ISA
> level from an ARCH; do not inject the default.
> (MIPS_DEFAULT_ISA_LEVEL_SPEC): New macro split out from
> MIPS_ISA_LEVEL_SPEC.
> (MIPS_ISA_NAN2008_SPEC): Update comment.
> (BASE_DRIVER_SELF_SPECS): Likewise.
> * config/mips/elfoabi.h (DRIVER_SELF_SPECS): Add
> MIPS_DEFAULT_ISA_LEVEL_SPEC.
> * config/mips/mti-elf.h (DRIVER_SELF_SPECS): Likewise.
> * config/mips/mti-linux.h (DRIVER_SELF_SPECS): Likewise.
> * config/mips/sde.h (DRIVER_SELF_SPECS): Likewise.
> ---
This looks OK.
next prev parent reply other threads:[~2015-01-13 23:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-05 23:09 Matthew Fortune
2015-01-14 0:44 ` Moore, Catherine [this message]
2015-01-14 9:10 ` Matthew Fortune
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