------- Comment #1 from pinskia at gmail dot com 2010-04-14 17:56 ------- Subject: Re: New: -march unconditionally added to COLLECT_GCC_OPTIONS
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 > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43750
