$ cat a.c int main() { return 0; } $ gcc a.c -fsanitize=thread -o a # OK $ gcc a.c -fsanitize=thread -m32 -o a # fails /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/../../../../x86_64-pc-linux-gnu/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/libtsan.so when searching for -ltsan /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/../../../../x86_64-pc-linux-gnu/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/libtsan.a when searching for -ltsan /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -ltsan collect2: error: ld returned 1 exit status amd64 multilib profile (hardened, but vanilla suffers the same bug). asan looks fine though: $ equery f gcc | grep /32/ | grep san /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan.a /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan.la /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan.so /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan.so.0 /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan.so.0.0.0 /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/32/libasan_preinit.o # emerge --info sys-devel/gcc Portage 2.2.0_alpha170_p3 (hardened/linux/amd64, gcc-4.8.0, glibc-2.17, 3.8.3-hardened x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.8.3-hardened-x86_64-AMD_Athlon-tm-_64_X2_Dual_Core_Processor_4000+-with-gentoo-2.2 KiB Mem: 3988732 total, 616864 free KiB Swap: 4393740 total, 3769248 free Timestamp of tree: Unknown ld GNU ld (GNU Binutils) 2.23.1 distcc 3.1 x86_64-pc-linux-gnu [disabled] ccache version 3.1.9 [disabled] app-shells/bash: 4.2_p37 dev-java/java-config: 2.1.12-r1 dev-lang/python: 2.7.3-r3, 3.1.5::<unknown repository>, 3.2.3-r2 dev-util/ccache: 3.1.9 dev-util/cmake: 2.8.9 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.5::<unknown repository> sys-devel/autoconf: 2.13::<unknown repository>, 2.69 sys-devel/automake: 1.5-r1::<unknown repository>, 1.7.9-r2::<unknown repository>, 1.8.5-r4::<unknown repository>, 1.9.6-r3::<unknown repository>, 1.10.3::<unknown repository>, 1.11.6::<unknown repository>, 1.12.6, 1.13.1 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.6.3, 4.7.2-r1, 4.8.0 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.7 (virtual/os-headers) sys-libs/glibc: 2.17 Repositories: gentoo cross-overlay gentoo-haskell slyfox-gentoo systemd ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /opt/openfire/resources/security/ /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/openvpn/easy-rsa /usr/share/polkit-1/actions /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/apache2-php5.4/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -pipe" DISTDIR="/gentoo/distfiles" EMERGE_DEFAULT_OPTS="--quiet-build=y" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms sign strict unknown-features-warn unmerge-logs unmerge-orphans userfetch xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="C" LC_ALL="" LDFLAGS="-Wl,--hash-style=gnu -Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/gentoo/portage" PORTDIR_OVERLAY="/home/st/portage/cross /home/st/portage/gentoo-haskell /home/st/portage/slyfox-gentoo /home/st/portage/systemd" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X aac accessibility acl alsa amd64 amr apng bash-completion berkdb bzip2 cairo chm cli cracklib crypt cups cxx dbus djvu dri dvd ffmpeg flac fontconfig ftp gd gdbm gpm gtk gudev hardened http hwdb iconv ipv6 jbig jpeg jpg justify lame libkms libnotify libsamplerate mad midi mikmod mms mmx mng mod modplug modules mp3 mpeg mudflap multilib musepack ncurses nls nptl ogg opengl openmp openssl orc pam pax_kernel pcre pdf png pulseaudio qt3support qt4 readline sdl session sftp smp smpeg speex spell spice sse sse2 ssl startup-notification svg systemd taglib tcpd theora timidity truetype udev unicode urandom vorbis vpx wavpack wma xa xft xinetd xv zlib" ABI_X86="64" 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="authn_alias actions alias auth_basic auth_digest 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" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" 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" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="ru en en_GB" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-3" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" QEMU_SOFTMMU_TARGETS="*" QEMU_USER_TARGETS="*" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="nouveau vesa fbdev nv" 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, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON ================================================================= Package Settings ================================================================= sys-devel/gcc-4.6.3 was built with the following: USE="cxx fortran gtk hardened mudflap (multilib) nls nptl openmp (-altivec) -doc (-fixed-point) -gcj -graphite (-libssp) -multislot -nopie -nossp -objc -objc++ -objc-gc -test -vanilla" ABI_X86="64" sys-devel/gcc-4.7.2-r1 was built with the following: USE="cxx fortran gtk hardened mudflap (multilib) nls nptl openmp (-altivec) -doc (-fixed-point) -gcj -go -graphite (-libssp) -multislot -nopie -nossp -objc -objc++ -objc-gc -test -vanilla" ABI_X86="64" sys-devel/gcc-4.8.0 was built with the following: USE="cxx fortran gtk hardened mudflap (multilib) nls nptl openmp (-altivec) -doc (-fixed-point) -gcj -go -graphite (-libssp) -multislot -nopie -nossp -objc -objc++ -objc-gc -test -vanilla" ABI_X86="64"
nothing we can do about it case "${target}" in x86_64-*-linux* | i?86-*-linux*) if test x$ac_cv_sizeof_void_p = x8; then TSAN_SUPPORTED=yes fi ;; -m32 means sizeof(void*) == 4
(In reply to comment #1) > nothing we can do about it > > case "${target}" in > x86_64-*-linux* | i?86-*-linux*) > if test x$ac_cv_sizeof_void_p = x8; then > TSAN_SUPPORTED=yes > fi > ;; > > -m32 means sizeof(void*) == 4 Aha, I see. Any chance to get slightly nicer error like "not supported" during compilation instead of linking?
