Sent from my iPhone
On Apr 14, 2010, at 1:56 AM, "jue at jue dot li" <gcc-bugzi...@gcc.gnu.org
> wrote:
As of 4.5.0 -march is always added to COLLECT_GCC_OPTIONS if gcc is
not called
with that option.
Well this was on purpose as before configuring for i686-linux-gnu was
really for i386 arch. Now it is correctly i686. If you don't want
__i686 defined, configure gcc for i586-linux-gnu instead which
defaults to i586.
$> echo '' | gcc -v -E - 2>&1 | grep -E '^(COLLECT_GCC_OPTIONS|gcc)'
gcc version 4.5.0 20100406 (prerelease) (CRUX) (GCC)
COLLECT_GCC_OPTIONS='-v' '-E' '-mtune=generic' '-march=pentiumpro'
the same with gcc 4.4.3:
$> echo '' | gcc -v -E - 2>&1 | grep -E '^(gcc|COLLECT_GCC_OPTIONS)'
gcc version 4.4.3 (CRUX) (GCC)
COLLECT_GCC_OPTIONS='-v' '-E' '-mtune=generic'
I run into that because I'm not able to compile glibc on i686
without explicit
setting CC to something like "gcc -march=i586".
The reason is the well known _i686 problem, see [1] for a exact
description of
my error and [2] for a very old but recently reopen glibc bug.
[1] http://www.eglibc.org/archives/patches/msg00073.html
[2] http://sources.redhat.com/bugzilla/show_bug.cgi?id=411
--
Summary: -march unconditionally added to COLLECT_GCC_OPTIONS
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jue at jue dot li
GCC build triplet: i686-pc-linux
GCC host triplet: i686-pc-linux
GCC target triplet: i686-pc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43750
