I have built gcc and glibc with splitdebug, but gdb can't find symbols GNU gdb (Gentoo 7.4.1 p1) 7.4.1 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: <http://bugs.gentoo.org/>... Reading symbols from /mnt/md3/cache/portage/sys-libs/glibc-2.16.0/work/build-x86-x86_64-pc-linux-gnu-nptl/nptl/tst-cancelx4...(no debugging symbols found)...done. [New LWP 20489] [New LWP 20479] warning: Can't read pathname for load map: Input/output error. [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `./tst-cancelx4 --direct'. Program terminated with signal 11, Segmentation fault. #0 0x04b5cac0 in _Unwind_Resume@plt () (gdb) bt full #0 0x04b5cac0 in _Unwind_Resume@plt () No symbol table info available. #1 0x04b5e5a7 in tf_usleep () No symbol table info available. #2 0xf045cd93 in start_thread () from /lib32/libpthread.so.0 No symbol table info available. #3 0xf03ce4ee in clone () from /lib32/libc.so.6 No symbol table info available. (gdb) quit Portage 2.1.11.5 (hardened/linux/amd64, gcc-4.5.4, glibc-2.14.1-r3, 3.4.4-hardened-r2 x86_64) ================================================================= System uname: Linux-3.4.4-hardened-r2-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q6600_@_2.40GHz-with-gentoo-2.1 Timestamp of tree: Wed, 11 Jul 2012 00:45:01 +0000 ccache version 3.1.7 [enabled] app-shells/bash: 4.2_p29 dev-java/java-config: 2.1.12 dev-lang/python: 2.7.3-r2, 3.2.3-r1 dev-util/ccache: 3.1.7 dev-util/cmake: 2.8.8-r3 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.1-r1 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.6 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.9.6-r3, 1.10.3, 1.11.6, 1.12.2 sys-devel/binutils: 2.22-r1 sys-devel/gcc: 4.4.7, 4.5.4::x-portage, 4.7.1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r3 sys-kernel/linux-headers: 3.4-r1 (virtual/os-headers) sys-libs/glibc: 2.14.1-r3 Repositories: gentoo x-portage ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA PUEL dlj-1.1 ETQW RTCW-ETEULA googleearth AdobeFlash-10.3 Oracle-BCLA-JavaSE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -O3 -pipe -march=core2" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /var/bind /var/lib/hsqldb" CONFIG_PROTECT_MASK="${EPREFIX}/etc/gconf /etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.4/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -O3 -pipe -march=core2" DISTDIR="/mnt/md3/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildpkg ccache config-protect-if-modified distlocks ebuild-locks fixlafiles metadata-transfer news parallel-fetch parse-eapi-ebuild-head protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv webrsync-gpg" FFLAGS="-O2 -O3 -pipe -march=core2" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu" LINGUAS="en_GB" MAKEOPTS="-j1" PKGDIR="/mnt/md3/cache/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="/mnt/md3/cache" PORTDIR="/mnt/md3/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acpi aio alsa amd64 amr apng berkdb bzip2 cairo caps chm cli consolekit cracklib crypt cxx dbus device-mapper dlz dri dts dvb eix enca exif extensions extras faad ffmpeg flac gcj gdbm glib glibc-omitfp glitz gnutls gtk gudev handbook hardened iconv jit jpeg jpeg2k justify lcms lm_sensors logrotate lzma matroska mikmod minizip mmx mng modplug modules mp3 mpeg mudflap multilib mysqli ncurses nodrm nptl nsplugin ogg openal opengl openmp pam pax_kernel pcre pdf pic png pppd qt qt3support qt4 rar readline rtsp sandbox schroedinger session slang spell sqlite sqlite3 sse sse2 sse3 ssl ssse3 symlink theora threads tiff truetype unicode urandom usb userpriv v4l2 vlc vorbis vpx x264 xcb xcomposite xml xorg xv xvid zlib" ALSA_CARDS="virtuoso" 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" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_GB" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Created attachment 318100 [details] strace
It seems -ggdb has to used.
