Your message dated Thu, 18 Dec 2008 13:00:03 +0100
with message-id <20081218120003.gf2...@laura.lri.fr>
and subject line Re: Bug#507405: gcc-snapshot: builds with -mtune=i486 by
default
has caused the Debian Bug report #507405,
regarding gcc-snapshot: builds with -mtune=i486 by default
to be marked as done.
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Bug report if necessary, and/or fix the problem forthwith.
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507405: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=507405
Debian Bug Tracking System
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--- Begin Message ---
Package: gcc-snapshot
Version: 20081117-1
Severity: normal
Hi,
I compared performance of gcc-4.3 and gcc-snapshot today, and there was at least
once quite bad regression. I reported it upstream, and the root cause was that
gcc-snapshot builds with -mtune=i486 and gcc-4.3 builds with -mtune=generic.
Could this be changed so the two packages match, and it would be easier to
compare the generated code?
--- End Message ---
--- Begin Message ---
Hi,
On amd64 and i386, gcc-4.3 and gcc-snapshot are both configured with
--mtune=generic, and:
art...@gcc16:~$ /usr/lib/gcc-snapshot/bin/gcc -v hello.c 2>&1 | grep cc1
/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.4.0/cc1 -quiet -v hello.c
-quiet -dumpbase hello.c -mtune=generic -auxbase hello -version -o
/tmp/ccy2bdJj.s
art...@gcc16:~$ gcc-4.3 -v hello.c 2>&1 | grep cc1
/usr/lib/gcc/x86_64-linux-gnu/4.3.2/cc1 -quiet -v hello.c -quiet -dumpbase
hello.c -mtune=generic -auxbase hello -version -o /tmp/ccJOrDav.s
it runs cc1 with -mtune=generic. But you still can add -mtune=foo to the
command line if you want to change the default. Closing.
On Sun, Nov 30, 2008 at 11:55:31PM +0100, Steinar H. Gunderson wrote:
> Package: gcc-snapshot
> Version: 20081117-1
> Severity: normal
>
> Hi,
>
> I compared performance of gcc-4.3 and gcc-snapshot today, and there was at
> least
> once quite bad regression. I reported it upstream, and the root cause was that
> gcc-snapshot builds with -mtune=i486 and gcc-4.3 builds with -mtune=generic.
> Could this be changed so the two packages match, and it would be easier to
> compare the generated code?
>
>
>
> --
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