Error compiling 2.4 with CVS gcc on Athlon

Error compiling 2.4 with CVS gcc on Athlon

[Ghadi Shayban]

I have no idea, but I'm guessing this isn't a gcc bug.  Here's where my 
build fails:

gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2 
-fomit-frame-pointer -fno-strict-aliasing -pipe 
-mpreferred-stack-boundary=2 -march=athlon     -c -o mmx.o mmx.c
{standard input}: Assembler messages:
{standard input}:139: Error: bad register name `%%mm0'
make[2]: *** [mmx.o] Error 1
make[2]: Leaving directory `/usr/src/linux/arch/i386/lib'
make[1]: *** [first_rule] Error 2
make[1]: Leaving directory `/usr/src/linux/arch/i386/lib'
make: *** [_dir_arch/i386/lib] Error 2


I thought maybe "mmx" is now named something else in the new gcc, but 
compiling it with -march=i686 doesn't change anything.

Ghadi Shayban

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Re: Error compiling 2.4 with CVS gcc on Athlon

[Alan Cox]

> I have no idea, but I'm guessing this isn't a gcc bug.  Here's where my 
> build fails:
> {standard input}: Assembler messages:
> {standard input}:139: Error: bad register name `%%mm0'

Your compiler/binutils are too old
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Re: Error compiling 2.4 with CVS gcc on Athlon

[Richard Henderson]

On Tue, Jan 02, 2001 at 03:12:37PM -0500, Ghadi Shayban wrote:
> {standard input}: Assembler messages:
> {standard input}:139: Error: bad register name `%%mm0'

This is, in fact, a compiler bug.  Somehow the "%%" in the
source didn't print as "%" as expected.


r~
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Re: Error compiling 2.4 with CVS gcc on Athlon

[H. Peter Anvin]

Followup to:  <20010102123913.A19554@twiddle.net>
By author:    Richard Henderson <rth@twiddle.net>
In newsgroup: linux.dev.kernel
>
> On Tue, Jan 02, 2001 at 03:12:37PM -0500, Ghadi Shayban wrote:
> > {standard input}: Assembler messages:
> > {standard input}:139: Error: bad register name `%%mm0'
> 
> This is, in fact, a compiler bug.  Somehow the "%%" in the
> source didn't print as "%" as expected.
> 

Actually, gcc doesn't do % expansion (and hence %% -> %) if there are
no :'s in the asm() statement.  I don't know if that's the issue here,
though.

	-hpa
-- 
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"Unix gives you enough rope to shoot yourself in the foot."
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