Bug 72881 – Gnomad fails to run when compiled against GCC 3.4.3 with -O3

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description Bryce Thomas 2004-11-29 19:26:34 UTC]

Emerging gnomad-2 with the -O3 in your CFLAGS will compile an unusable program.

Reproducible: Always
Steps to Reproduce:
1.
2.
3.

Actual Results:  
Upon launching gnomad-2 it throws an error that asks you to restart the
application or quit.

Expected Results:  
gnomad-2 runs normally.

Portage 2.0.51-r3 (default-linux/x86/2004.3, gcc-3.4.3, glibc-2.3.4.20041102-r0,
2.6.9-gentoo-r6 i686)
=================================================================
System uname: 2.6.9-gentoo-r6 i686 mobile AMD Athlon(tm) 4 Processor
Gentoo Base System version 1.6.6
Autoconf: sys-devel/autoconf-2.59-r5
Automake: sys-devel/automake-1.8.5-r1
Binutils: sys-devel/binutils-2.15.92.0.2-r1
Headers:  sys-kernel/linux26-headers-2.6.8.1-r1
Libtools: sys-devel/libtool-1.5.2-r7
ACCEPT_KEYWORDS="x86 ~x86"
AUTOCLEAN="yes"
CFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
COMPILER=""
CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config
/usr/kde/3/share/config /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms"
GENTOO_MIRRORS="http://gentoo.osuosl.org
http://distro.ibiblio.org/pub/Linux/distributions/gentoo"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="3dnow X acpi alsa apm avi berkdb bitmap-fonts crypt dga directfb dmx dvd
dvdr dvdread encode f77 fam foomaticdb fortran gdbm gif glut gpm gtk gtk2 imlib
java jpeg libg++ libwww mad mikmod mmx mng motif mpeg nas ncurses nls nptl
oggvorbis opengl pam pdflib perl png python quicktime readline real sdl spell
ssl svg svga tcpd tiff truetype x86 xml2 xmms xv xvid zlib"

[Comment 1 Bryce Thomas 2004-11-29 19:35:24 UTC]

Created attachment 44969 [details, diff]
Strips unsafe -O? flags from CFLAGS

[Comment 2 Eric Shattow 2004-12-21 17:26:50 UTC]

if you want to take my suggestion (which has helped me), then...
relax your C FLAGS to '-march=athlon-4 -O2 -mno-sse' and recompile everything on your box 'emerge -e world'.   then give us a backtrace.  (gdb /usr/bin/whatever;  run;  make it go boom, and then 'bt full')

this is probably the movaps disaster bug.  movaps on non-sixteen-byte aligned memory, affects gcc 3.4.x compiled programs especially.  not planned to be fixed in gcc mainline for some time.  disabling SSE code generation has fixed a host of troubles for me (i use gcc 3.4.x too).

[Comment 3 Jan Brinkmann (RETIRED) 2005-04-02 09:25:16 UTC]

please pick up jnc's suggestion, afterwards provide the gdb backtrace. thanks