I have a core 2 Quad Q9300, it only has sse4.1, but not sse4.2. qt-core 4.7.1 wrongly assume it has. Critical part : sse4_2 auto-detection... () x86_64-pc-linux-gnu-g++ -c -pipe -msse4.2 -Wall -W -I../../../mkspecs/linux-g++ -I. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/freetype2 -o sse4_2.o sse4_2.cpp x86_64-pc-linux-gnu-g++ -Wl,-O1 -Wl,-rpath,/usr/lib64/qt4 -o sse4_2 sse4_2.o -L/usr/lib64 -lgthread-2.0 -lrt -lglib-2.0 -msse4.2 sse4_2 enabled. It leads to this error : x86_64-pc-linux-gnu-g++ -c -march=native -O2 -mtune=native -pipe -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/freetype2 -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -DELF_INTERPRETER=\"/lib64/ld-linux-x86-64.so.2\" -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_HAVE_SSE4_1 -DQT_HAVE_SSE4_2 -DQT_HAVE_AVX -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/linux-g++ -I. -I../../include -I../../include/QtCore -I.rcc/release-shared -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I.moc/release-shared -o .obj/release-shared/qsimd.o tools/qsimd.cpp x86_64-pc-linux-gnu-g++ -c -march=native -O2 -mtune=native -pipe -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/freetype2 -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -DELF_INTERPRETER=\"/lib64/ld-linux-x86-64.so.2\" -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_HAVE_SSE4_1 -DQT_HAVE_SSE4_2 -DQT_HAVE_AVX -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/linux-g++ -I. -I../../include -I../../include/QtCore -I.rcc/release-shared -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I.moc/release-shared -o .obj/release-shared/qsize.o tools/qsize.cpp Dans le fichier inclus à partir de tools/qsimd_p.h:93, à partir de tools/qsimd.cpp:42: /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.5/include/nmmintrin.h:31:3: erreur: #error "SSE4.2 instruction set not enabled" make: *** [.obj/release-shared/qsimd.o] Erreur 1 make: *** Attente des tâches non terminées.... emake failed Complete emerge info : # emerge --info qt-core Portage 2.2.0_alpha4 (default/linux/amd64/10.0/desktop, gcc-4.4.5, glibc-2.12.1-r3, 2.6.36-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-2.6.36-gentoo-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q9300_@_2.50GHz-with-gentoo-2.0.1 Timestamp of tree: Wed, 10 Nov 2010 11:30:01 +0000 app-shells/bash: 4.1_p9 dev-java/java-config: 2.1.11-r2 dev-lang/python: 2.6.6-r1, 3.1.2-r4 dev-util/cmake: 2.8.1-r2 sys-apps/baselayout: 2.0.1-r1 sys-apps/openrc: 0.6.3 sys-apps/sandbox: 2.3-r1 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.9.6-r3, 1.10.3, 1.11.1 sys-devel/binutils: 2.20.1-r1 sys-devel/gcc: 4.4.5 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.10 sys-devel/make: 3.82 virtual/os-headers: 2.6.35 (sys-kernel/linux-headers) Repositories: gentoo gcpan_overlay xwing local mozilla x11 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -mtune=native -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/eselect/postgresql /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=native -O2 -mtune=native -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps y" FEATURES="assume-digests binpkg-logs buildsyspkg collision-protect distlocks fixlafiles fixpackages metadata-transfer news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" GENTOO_MIRRORS="ftp://ftp.free.fr/mirrors/ftp.gentoo.org/ ftp://mirror.switch.ch/mirror/gentoo/ http://trumpetti.atm.tut.fi/gentoo/ http://mirror.ovh.net/gentoo-distfiles/ http://gentoo.tiscali.nl/" LANG="fr_FR.UTF-8" LC_ALL="fr_FR.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -Wl,--sort-common" LINGUAS="fr" MAKEOPTS="-j5" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" 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="/usr/local/portage/gcpan-portage /usr/local/portage/portage /usr/local/portage/local-portage /var/lib/layman/mozilla /var/lib/layman/x11" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi additions alsa amd64 apng bash-completion branding bzip2 cairo cdr cli clucene consolekit cracklib crypt cups cxx dbus dri dts dvb dvd dvdnav dvdr emboss encode exif extensions extras firefox firefox3 flac fontconfig fortran fr gif gpm gtk iconv idn iproute2 ipv6 ithreads jpeg kde lcms live llvm lzma mad matroska mmx mng modules mozilla mp3 mp4 mpeg mudflap multilib ncurses network nls nptl nptlonly nsplugin ofx ogg opengl openmp pam pango pcre pdf perl pic png pppd qt3support qt4 raster rdesktop rdp readline sasl scanner semantic-desktop session spell sse sse2 ssl startup-notification svg sysfs syslog tcpd theora threads tiff truetype unicode usb v4l v4l2 vim-pager vim-syntax vnc vorbis x264 xcb xcomposite xml xorg xulrunner xv xvid xvmc zip zlib" ALSA_CARDS="hda-intel" 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 cgi cgid 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" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="fr" NGINX_MODULES_HTTP="access auth_basic autoindex browser charset empty_gif fastcgi gzip limit_req limit_zone map memcached proxy realip referer rewrite upstream_ip_hash userid stub_status" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="nouveau" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, FFLAGS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS ================================================================= Package Settings ================================================================= x11-libs/qt-core-4.7.0 was built with the following: USE="exceptions glib iconv (multilib) qt3support ssl (-aqua) -debug -optimized-qmake -pch -private-headers" Follow the complete build log
Created attachment 253881 [details] qt-core 4.7.1 build log
I confirm that the sse4_2 test program builds perfectly fine, but does not run, triggering not allowed instructions. It seems that qt-core assumes that if it builds, it supports the instruction set. dagobah 14:10 - 0.48 /var/tmp/portage/x11-libs/qt-core-4.7.1/work/qt-everywhere-opensource-src-4.7.1/config.tests/unix/sse4_2 # x86_64-pc-linux-gnu-g++ -c -pipe -msse4.2 -Wall -W -I../../../mkspecs/linux-g++ -I. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/freetype2 -o sse4_2.o sse4_2.cpp dagobah 14:11 - 0.44 /var/tmp/portage/x11-libs/qt-core-4.7.1/work/qt-everywhere-opensource-src-4.7.1/config.tests/unix/sse4_2 # x86_64-pc-linux-gnu-g++ -Wl,-O1 -Wl,-rpath,/usr/lib64/qt4 -o sse4_2 sse4_2.o -L/usr/lib64 -lgthread-2.0 -lrt -lglib-2.0 -msse4.2 dagobah 14:11 - 0.41 /var/tmp/portage/x11-libs/qt-core-4.7.1/work/qt-everywhere-opensource-src-4.7.1/config.tests/unix/sse4_2 # ./sse4_2 Illegal instruction
Created attachment 253893 [details, diff] qt4-build.eclass.patch Workaround patch which disables both sse4.1 and sse4.2.
Adding Qt upstream bug in URL.
patch applied, thanks Guillaume & Timo. I'll leave this bug open to remind us that the fix is currently a workaround.
(In reply to comment #5) > patch applied, thanks Guillaume & Timo. > > I'll leave this bug open to remind us that the fix is currently a workaround. Alex, has the patch hit the tree? I just synced and it still fails here.
Yes patch is in tree (I just synced ans it's in) And I can confirm it fixes the build
(In reply to comment #7) > Yes patch is in tree (I just synced ans it's in) > And I can confirm it fixes the build Right. It seems that my copy was not synced to the server I synced from.
*** Bug 345077 has been marked as a duplicate of this bug. ***
This patch is perhaps a bit nicer: http://qt.gitorious.org/~mikemcquaid/qt/mikemcquaid-qt/commit/ca2e8b6dc176576f7217f4b7209994eddad1a358 I'm from OSX land (Homebrew contributer) but should work on Linux too.
(In reply to comment #10) > This patch is perhaps a bit nicer: > http://qt.gitorious.org/~mikemcquaid/qt/mikemcquaid-qt/commit/ca2e8b6dc176576f7217f4b7209994eddad1a358 > > I'm from OSX land (Homebrew contributer) but should work on Linux too. > Mike's patch has been merged upstream. We should apply it and remove the workaround. Thanks Mike!
Created attachment 254767 [details, diff] Mike's patch (merged upstream)
sse 4.* is still disabled in 4.7.9999, so something is broken in the eclass I think..
Since upstream fixed[1] the bug in Qt 4.7.2, could sse4.1/4.2 be re-enabled in the eclass for any versions except 4.7.1? [1] http://bugreports.qt.nokia.com/browse/QTBUG-13623
fixed, thanks for reminding us :)
It seems that it came again in 4.7.2 it assumes that I have SSE 4.2 and AVX which I currently do not have (only SSE 4.1). I already posted an upstream bug about it, but this time compilation does not fail, just it assumes it, but I think it can lead to runtime errors it it actually tries to use previously activated SSE 4.2 and AVX extension in a CPU that does not actually supports them. Can it be reopened? Upstream bugreport: https://bugreports.qt.nokia.com/browse/QTBUG-20650
