From: Andrei Borzenkov <arvidjaar@gmail.com>
To: "Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>
Cc: grub-devel@gnu.org
Subject: Re: On MIPS clang default to different arch than GNU
Date: Wed, 22 Jul 2015 06:24:33 +0300 [thread overview]
Message-ID: <20150722062433.2757387d@opensuse.site> (raw)
In-Reply-To: <55AEDE49.6060408@gmail.com>
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В Wed, 22 Jul 2015 02:05:29 +0200
Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@gmail.com> пишет:
> On 19.07.2015 09:33, Andrei Borzenkov wrote:
> > clang -cc1 version 3.8.0 based upon LLVM 3.8.0svn default target x86_64-unknown-linux-gnu
> > ignoring nonexistent directory "/include"
> > #include "..." search starts here:
> > #include <...> search starts here:
> > /usr/local/include
> > /home/bor/build/clang/bin/../lib/clang/3.8.0/include
> > /usr/include
> > End of search list.
> > "/usr/bin/mips-suse-linux-as" -march mips32r2 -mabi 32 -call_nonpic -EB -msoft-float -KPIC -o conftest /tmp/foo-3da0d2.s
> > bor@opensuse:~/src/llvm/tools/clang> file conftest
> > conftest: ELF 32-bit MSB relocatable, MIPS, MIPS32 rel2 version 1 (SYSV), not stripped
> >
> > While for the same file GAS creates
> >
> > bor@opensuse:~/build/grub> mips-suse-linux-as -v asm-tests/mips.S
> > GNU assembler version 2.24.0 (mips-suse-linux) using BFD version (GNU Binutils; openSUSE 13.2) 2.24.0.20140403-6.1
> > bor@opensuse:~/build/grub> file a.out
> > a.out: ELF 32-bit MSB relocatable, MIPS, MIPS-I version 1 (SYSV), not stripped
> > bor@opensuse:~/build/grub>
> >
> > (using -integrated-as does not change it - arch is still the same).
> >
> > Not sure if it matters.
> >
> >
> I think it doesn't. It's just on the level of flags. I don't think that
> it really generates any non-mips1 instructions unless specifically asked
> for.
Does not -march mips32r2 does it?
> Just it fails to reflect this in flags in resulting binary.
> Unlike in the case of x86, on mips there is no need to enable
> instruction subsets, so if compiler generates instructions not supported
> by target, then it's misconfigured and it's likely bigger problem than
> just GRUB.
> > _______________________________________________
> > Grub-devel mailing list
> > Grub-devel@gnu.org
> > https://lists.gnu.org/mailman/listinfo/grub-devel
> >
>
>
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prev parent reply other threads:[~2015-07-22 3:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-19 7:33 On MIPS clang default to different arch than GNU Andrei Borzenkov
2015-07-22 0:05 ` Vladimir 'φ-coder/phcoder' Serbinenko
2015-07-22 3:24 ` Andrei Borzenkov [this message]
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