Bugzilla Bug 241828

g++ -o
"/var/tmp/portage/x11-libs/qt-4.3.3/work/qt-x11-opensource-src-4.3.3/bin/qmake"
project.o property.o main.o makefile.o unixmake2.o unixmake.o mingw_make.o
option.o winmakefile.o projectgenerator.o meta.o makefiledeps.o metamakefile.o
xmloutput.o pbuilder_pbx.o borland_bmake.o msvc_dsp.o msvc_vcproj.o
msvc_nmake.o msvc_objectmodel.o qstring.o qtextstream.o qiodevice.o qglobal.o
qbytearray.o qbytearraymatcher.o qdatastream.o qbuffer.o qlistdata.o qfile.o
qfsfileengine_unix.o qfsfileengine_iterator_unix.o qfsfileengine.o
qfsfileengine_iterator.o qregexp.o qvector.o qbitarray.o qdir.o qdiriterator.o
quuid.o qhash.o qfileinfo.o qdatetime.o qstringlist.o qabstractfileengine.o
qtemporaryfile.o qmap.o qmetatype.o qsettings.o qlibraryinfo.o qvariant.o
qvsnprintf.o qlocale.o qlinkedlist.o qurl.o qnumeric.o qcryptographichash.o
qscriptasm.o qscriptast.o qscriptastvisitor.o qscriptcompiler.o
qscriptecmaarray.o qscriptecmaboolean.o qscriptecmacore.o qscriptecmadate.o
qscriptecmafunction.o qscriptecmaglobal.o qscriptecmamath.o qscriptecmanumber.o
qscriptecmaobject.o qscriptecmaregexp.o qscriptecmastring.o qscriptecmaerror.o
qscriptcontext_p.o qscriptengine.o qscriptengine_p.o qscriptextenumeration.o
qscriptextvariant.o qscriptcontext.o qscriptfunction.o qscriptgrammar.o
qscriptlexer.o qscriptclassdata.o qscriptparser.o qscriptprettypretty.o
qscriptsyntaxchecker.o qscriptvalue.o qscriptvalueimpl.o qscriptvalueiterator.o 
floatmath auto-detection... ()
/var/tmp/portage/x11-libs/qt-4.3.3/work/qt-x11-opensource-src-4.3.3/config.tests/unix/compile.test:
line 54: 31091 Segmentation fault      "$OUTDIR/bin/qmake" -nocache -spec
"$QMKSPEC" "CONFIG+=$QMAKE_CONFIG" "LIBS*=$LFLAGS" "INCLUDEPATH*=$INCLUDEPATH"
"QMAKE_CXXFLAGS*=$CXXFLAGS" "$SRCDIR/$TEST/$EXE.pro" -o
"$OUTDIR/$TEST/Makefile"
make: *** No targets specified and no makefile found.  Stop.
floatmath disabled.

(gdb) run
Starting program:
/var/tmp/portage/x11-libs/qt-4.3.3/work/qt-x11-opensource-src-4.3.3/bin/qmake 

Program received signal SIGSEGV, Segmentation fault.
QRegExpCharClass::operator= (this=0x9b9f70, cc=@0x98e4c0)
    at
/var/tmp/portage/x11-libs/qt-4.3.3/work/qt-x11-opensource-src-4.3.3/include/QtCore/../../src/corelib/arch/qatomic_generic.h:73
73      { return ++(*ptr); }
(gdb) bt
#0  QRegExpCharClass::operator= (this=0x9b9f70, cc=@0x98e4c0)
    at
/var/tmp/portage/x11-libs/qt-4.3.3/work/qt-x11-opensource-src-4.3.3/include/QtCore/../../src/corelib/arch/qatomic_generic.h:73


Reproducible: Always

Steps to Reproduce:
1. emerge qt 4.3.3
2.
3.




Portage 2.1.4.5 (default-linux/amd64/2007.0/desktop, gcc-4.3.9999,
glibc-2.7-r2, 2.6.25-gentoo-r7.rivendell x86_64)
=================================================================
System uname: 2.6.25-gentoo-r7.rivendell x86_64 Intel(R) Xeon(R) CPU X5482 @
3.20GHz
Timestamp of tree: Sun, 12 Oct 2008 16:34:01 +0000
ccache version 2.4 [enabled]
app-shells/bash:     3.2_p33
dev-java/java-config: 1.3.7, 2.1.6
dev-lang/python:     2.5.2-r7
dev-util/ccache:     2.4-r7
dev-util/cmake:      2.4.7-r1
sys-apps/baselayout: 1.12.11.1
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.13, 2.61-r2
sys-devel/automake:  1.4_p6, 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.1-r1
sys-devel/binutils:  2.18-r3
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.26
virtual/os-headers:  2.6.23-r3
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=core2 -ggdb"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/env /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/config /usr/shutdown /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/
/etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/terminfo
/etc/texmf/web2c /etc/udev/rules.d"
CPPFLAGS="-I/home/andrew/build/include"
CXXFLAGS="-O2 -pipe -march=core2 -ggdb"
DISTDIR="/usr/portage/distfiles"
FEATURES="ccache distlocks metadata-transfer parallel-fetch sandbox sfperms
splitdebug strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://mirror.bytemark.co.uk/gentoo/
ftp://mirror.bytemark.co.uk/gentoo/
http://www.mirrorservice.org/sites/www.ibiblio.org/gentoo/
ftp://ftp.mirrorservice.org/sites/www.ibiblio.org/gentoo/
http://mirror.qubenet.net/mirror/gentoo/
ftp://mirror.qubenet.net/mirror/gentoo/ http://gentoo.virginmedia.com/
ftp://gentoo.virginmedia.com/sites/gentoo "
LANG="en_GB.UTF-8"
LINGUAS="en_GB"
MAKEOPTS="-j9"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --stats --timeout=180 --exclude=/distfiles
--exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/home/andrew/projects/gentoo/gnu_andrew_overlay
/home/andrew/projects/gentoo/java-overlay"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X a52 aac acl acpi alsa amd64 avahi bash-completion berkdb bzip2 cairo
caps cddb cdparanoia cdr cli cracklib crypt cups curl cvs dbus dga dirac djvu
dri dts dv dvb dvd dvdr dvdread eds emacs emboss encode evo fam ffmpeg fftw
firefox flac fontconfig fortran ftp gcj gdbm gif gnome gnutls gpm graphviz
gstreamer gtk gtkhtml hal iconv idn ieee1394 imagemagick imap ipv6 isdnlog java
javascript jbig jpeg jpeg2k kerberos ladspa lame latex lcms ldap libass libcaca
libnotify libsamplerate lzo mad mbox midi mikmod mmap mmx mng mp3 mpeg mudflap
musepack musicbrainz nas ncurses nis nls nntp nptl nptlonly nsplugin ogg
openexr opengl openmp oss pam pch pcre pdf perl png policykit postgres pppd
pulseaudio python qt3 qt3support qt4 quicktime readline reflection sasl
schroedinger sdl session sndfile sox speex spell spl sse sse2 ssl
startup-notification subversion svg taglib tcpd tga theora threads tiff
truetype unicode usb vorbis wavpack wmf x264 xattr xcomposite xft xml xorg xosd
xprint xscreensaver xulrunner xv xvid yahoo zeroconf zlib" ALSA_CARDS="ali5451
als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938
es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx
via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop
empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul
mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions
alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file
authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user
autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires
ext_filter file_cache filter headers include info log_config logio mem_cache
mime mime_magic negotiation rewrite setenvif speling status unique_id userdir
usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev"
KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001
mtxorb ncurses text" LINGUAS="en_GB" USERLAND="GNU" VIDEO_CARDS="radeonhd fglrx
radeon"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, LDFLAGS,
PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Can you try again with one of the gcc versions available in the main gentoo
tree? I suspect a problem with the unstable version of gcc rather than the
stable version of qt...

Duplicate of bug 213411.

Append '-fno-strict-aliasing' to your CFLAGS to workaround Qt-4.3.x issue.
Qt-4.4.x should be fixed.

andrew: can you confirm that adding '-fno-strict-aliasing' to your CFLAGS makes
this problem go away?

if so, please close this bug as a duplicate of bug #213411.
thanks.

I can comfirm that the adding "-fno-strict-aliasing" enables building qt. I had
the same problem andrew reported. I suggest marking it as duplicate. 

Portage 2.1.6.4 (default/linux/amd64/2008.0/desktop, gcc-4.3.2,
glibc-2.9_p20081201-r1, 2.6.28 x86_64)
=================================================================
System uname:
Linux-2.6.28-x86_64-Intel-R-_Core-TM-2_Duo_CPU_P8400_@_2.26GHz-with-glibc2.2.5
Timestamp of tree: Fri, 02 Jan 2009 15:45:01 +0000
ccache version 2.4 [disabled]
app-shells/bash:     3.2_p48
dev-java/java-config: 1.3.7-r1, 2.1.6-r1
dev-lang/python:     2.5.2-r8
dev-util/ccache:     2.4-r8
sys-apps/baselayout: 2.0.0
sys-apps/openrc:     0.4.1-r1
sys-apps/sandbox:    1.3.2
sys-devel/autoconf:  2.13, 2.63
sys-devel/automake:  1.5, 1.7.9-r1, 1.9.6-r2, 1.10.2
sys-devel/binutils:  2.19
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   2.2.6a
virtual/os-headers:  2.6.28-r1
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=core2 -pipe -fomit-frame-pointer -fno-strict-aliasing"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/config"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/
/etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release
/etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/
/etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo
/etc/texmf/web2c /etc/udev/rules.d /usr/share/X11/xkb"
CXXFLAGS="-O2 -march=core2 -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="collision-dectection distlocks fixpackages parallel-fetch
protect-owned sandbox sfperms strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/
http://ftp.uni-erlangen.de/pub/mirrors/gentoo
http://mirrors.sec.informatik.tu-darmstadt.de/gentoo/
http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ "
LDFLAGS="-Wl,-O1"
LINGUAS="de de_DE en en_US en_GB"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --stats --timeout=180 --exclude=/distfiles
--exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X a52 aac acl acpi alsa amd64 apache2 bash-completion berkdb bluetooth
branding bzip2 cairo caps cdr cli cracklib crypt cscope ctype cups curl dbus
dri dvd dvdr dvdread eds emboss encode esd evo exif expat fam ffmpeg firefox
flac fortran gd gdbm gif gpm gstreamer gtk hal iconv ieee1394 ipv6 isdnlog
jabber java jpeg kde kdeenablefinal lcms ldap libnotify mad midi mikmod mmap
mmx mp3 mpeg mplayer mudflap multilib musepack mysql ncurses nls nptl nptlonly
nsplugin ogg opengl openmp pam pcre pdf perl php png ppds pppd python qt3
qt3support qt4 quicktime raw readline reflection ruby sdl session slang sndfile
speex spell spl sqlite sse sse2 ssl startup-notification svg sysfs tcpd theora
threads tiff truetype unicode usb vim-syntax vorbis x264 xine xml xorg xsl
xulrunner xv zlib" ALSA_CARDS="intel8x0" ALSA_PCM_PLUGINS="adpcm alaw asym copy
dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear
meter mmap_emul mulaw multi null plug rate route share shm softvol"
APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_dbd
authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile
authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd
deflate dir disk_cache env expires ext_filter file_cache filter headers ident
imagemap include info log_config logio mem_cache mime mime_magic negotiation
proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so
speling status unique_id userdir usertrack vhost_alias" APACHE2_MPMS="worker"
CAMERAS="ptp2" ELIBC="glibc" INPUT_DEVICES="mouse keyboard evdev synaptics"
KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001
mtxorb ncurses text" LINGUAS="de de_DE en en_US en_GB" USERLAND="GNU"
VIDEO_CARDS="vga vesa intel radeon radeonhd"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG,
LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

*** This bug has been marked as a duplicate of bug 213411 ***

Looks like it was marked a dupe before I refreshed, so just repasting my
comment:

I can reproduce this issue and can confirm that adding -fno-strict-aliasing to
CFLAGS (and thus CXXFLAGS) fixes the problem.  Closing as duplicate of 213411
as requested in comment #3.

Also note that GCC 4.3.x is targeted to go stable in the not-to-distant future.
 I'd recommend an append-flags be added to the =x11-libs/qt-4.3.3 ebuild or
=x11-libs/qt-4.3.4-r1 be considered for test/stable very soon.

Actually, qt 4.4.2 is meant to go stable soon, see bug 248038. So that should
solve it for stable as well.