Messages in this thread | | | Date | Mon, 14 Dec 1998 20:08:10 -0500 (EST) | From | Anthony Barbachan <> | Subject | Re: [PATCH] Support new egcs/pgcc -mpentium(pro) options |
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On Mon, 14 Dec 1998, Junichi Saito wrote:
> > On Sun, 13 Dec 1998, Matthias Andree wrote: > > >Hello penguinoids, > > > >I have wrote a small patch against 2.1.131-ac9 which implements the > >promised enhanced support for the new egcs/pgcc i386 target submodel > >options such as -mpentium, -mpentiumpro, -march=pentium and > >-march=pentiumpro. > > > >The patch should be pretty self-explanatory and touches: > >+++ linux-2.1.131-ac9-ma/Documentation/Configure.help Sun Dec 13 05:15:06 1998 > >+++ linux-2.1.131-ac9-ma/arch/i386/Makefile Sun Dec 13 05:14:09 1998 > >+++ linux-2.1.131-ac9-ma/arch/i386/config.in Sun Dec 13 05:14:21 1998 > > > > > > > >Some questions left: > > > >1. Does gcc 2.8 support the aforementioned options? > > > >2. What is the minimum egcs/pgcc version for these options? > > > >3. What is the reason a 486 configured kernel will not run on the 386? > > It's evidently not the compiler as far as I can tell from my > > gcc-2.7.2.x/pgcc-1.1.1 documentation. > > > > > > > >And *please*, do check the Configure.help if the contents are correct. > >There are probably some gcc/egcs/pgcc gurus out there which can comment > >on for-/backwards compatibility, particularly in context with the > >-march= option. > > > >Please Cc: your answers/comments. > > > >Happy compiling, > > > >-- > >Matthias Andree > > > > As to -march= option, it is available indeed both for pentium and > pentiumpro, according to the documentaion. I remember, however, reading a > mail posted to the pgcc mailing list some months ago, where the author > wrote approximately : > > this option dosen't make sense for pentium because there are no > architecture specific instrunctions available for it (but not for > pentiumpro). So the valide option for pentium is -mpentium. >
Their are alot of pentium specific instructions. Of course gcc/gas make not support any of them.
> I'm merely a beginner user. It's possible I misunderstood the intention of > the author. > > Can some experts confirm or refute the above statement? > > junichi > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/ >
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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