Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

From: Jim Bos
Date: Mon Nov 15 2010 - 14:11:04 EST


On 11/15/2010 07:26 PM, Jakub Jelinek wrote:
> On Mon, Nov 15, 2010 at 07:17:31PM +0100, Jim Bos wrote:
>> # gcc -v
>> Reading specs from /usr/lib/gcc/i486-slackware-linux/4.5.1/specs
>> COLLECT_GCC=gcc
>> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i486-slackware-linux/4.5.1/lto-wrapper
>> Target: i486-slackware-linux
>> Configured with: ../gcc-4.5.1/configure --prefix=/usr --libdir=/usr/lib
>> --mandir=/usr/man --infodir=/usr/info --enable-shared --enable-bootstrap
>> --enable-languages=ada,c,c++,fortran,java,objc --enable-threads=posix
>> --enable-checking=release --with-system-zlib
>> --with-python-dir=/lib/python2.6/site-packages
>> --disable-libunwind-exceptions --enable-__cxa_atexit --enable-libssp
>> --with-gnu-ld --verbose --with-arch=i486 --target=i486-slackware-linux
>> --build=i486-slackware-linux --host=i486-slackware-linux
>> Thread model: posix
>> gcc version 4.5.1 (GCC)
>
> Does it have any patches applied? The gcc options look the same as what
> I've been already trying earlier.
> Thus, can you run gcc with those options on i8k.i and add -fverbose-asm
> to make it easier to read and post i8k.s you get?
>
> Jakub
>

Slackware is typically not patching much (and I'm just using the
pre-compiled binary). Here is the link to how it's built:
http://slackware.osuosl.org/slackware-current/source/d/gcc/
there doesn't appear to be anything relevant changed.

I already posted the .s files, plain 2.6.36 and the one with working
patch, I =think= that's already using -fverbose-asm, at least that shows
in the output.

_
Jim



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