I currently have dev-util/perf-4.14.33 installed. When I tried to upgrade to dev-util/perf-4.14.33-r1, it failed to build, spewing A LOT of "undefined reference" errors. I then tried to rebuild the already installed version, and it failed to build as well. I don't know what happened, but looks like there's something wrong with environment/dependencies, not with the ebuild. Reproducible: Always Portage 2.3.51 (python 3.6.5-final-0, default/linux/amd64/17.0, gcc-7.3.0, glibc-2.27-r6, 4.18.16-gentoo x86_64) ================================================================= System uname: Linux-4.18.16-gentoo-x86_64-Intel-R-_Core-TM-_i3-4010U_CPU_@_1.70GHz-with-gentoo-2.4.1 KiB Mem: 8057148 total, 236864 free KiB Swap: 16777212 total, 16776428 free Timestamp of repository gentoo: Wed, 07 Nov 2018 22:45:01 +0000 Head commit of repository gentoo: dd61315213ddd62b513390133e8d7a4cf7077389 sh bash 4.4_p12 ld GNU ld (Gentoo 2.30 p5) 2.30.0 distcc 3.2rc1 x86_64-pc-linux-gnu [disabled] ccache version 3.3.4 [disabled] app-shells/bash: 4.4_p12::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.26.2::gentoo dev-lang/python: 2.7.15-r100::sage-on-gentoo, 3.5.5-r1::gentoo, 3.6.5::gentoo dev-util/ccache: 3.3.4-r1::gentoo dev-util/cmake: 3.9.6::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.4.1-r2::gentoo sys-apps/sandbox: 2.13::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.11.6-r3::gentoo, 1.13.4-r2::gentoo, 1.15.1-r2::gentoo sys-devel/binutils: 2.30-r4::gentoo sys-devel/gcc: 7.3.0-r3::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers) sys-libs/glibc: 2.27-r6::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://mirror.yandex.ru/gentoo-portage priority: -1000 sync-rsync-verify-metamanifest: yes sync-rsync-extra-opts: sync-rsync-verify-max-age: 24 sync-rsync-verify-jobs: 1 LocalOverlay location: /usr/local/portage masters: gentoo crossdev location: /usr/local/portage-crossdev masters: gentoo brother-overlay location: /var/lib/layman/brother-overlay sync-type: laymansync sync-uri: git://github.com/stefan-langenmaier/brother-overlay.git masters: gentoo priority: 50 johu location: /var/lib/layman/johu sync-type: laymansync sync-uri: https://anongit.gentoo.org/git/dev/johu.git masters: gentoo priority: 50 mrueg location: /var/lib/layman/mrueg sync-type: laymansync sync-uri: https://anongit.gentoo.org/git/dev/mrueg.git masters: gentoo priority: 50 pentoo location: /var/lib/layman/pentoo sync-type: laymansync sync-uri: git://github.com/pentoo/pentoo-overlay.git masters: gentoo priority: 50 qt location: /var/lib/layman/qt sync-type: laymansync sync-uri: https://anongit.gentoo.org/git/proj/qt.git masters: gentoo priority: 50 sage-on-gentoo location: /var/lib/layman/sage-on-gentoo sync-type: laymansync sync-uri: git://github.com/cschwan/sage-on-gentoo.git masters: gentoo science priority: 50 science location: /var/lib/layman/science sync-type: laymansync sync-uri: https://anongit.gentoo.org/git/proj/sci.git masters: gentoo priority: 50 steam-overlay location: /var/lib/layman/steam-overlay sync-type: laymansync sync-uri: git://github.com/anyc/steam-overlay.git masters: gentoo priority: 50 stuff location: /var/lib/layman/stuff sync-type: laymansync sync-uri: https://github.com/istitov/stuff.git masters: gentoo priority: 50 wjn-overlay location: /var/lib/layman/wjn-overlay sync-type: laymansync sync-uri: https://bitbucket.org/wjn/wjn-overlay.git masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=core-avx2 -O2 -pipe -msahf -mmovbe --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=3072 -mtune=core-avx2 -fstack-protector" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/easy-rsa /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.6/ext-active/ /etc/php/apache2-php7.1/ext-active/ /etc/php/apache2-php7.2/ext-active/ /etc/php/cgi-php5.6/ext-active/ /etc/php/cgi-php7.1/ext-active/ /etc/php/cgi-php7.2/ext-active/ /etc/php/cli-php5.6/ext-active/ /etc/php/cli-php7.1/ext-active/ /etc/php/cli-php7.2/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="-march=core-avx2 -O2 -pipe -msahf -mmovbe --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=3072 -mtune=core-avx2 -fstack-protector" DISTDIR="/usr/portage/distfiles" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync metadata-transfer multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS=" http://mirror.yandex.ru/gentoo-distfiles/" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="acl amd64 berkdb bindist bzip2 cli crypt cxx dri fortran gdbm glamor iconv ipv6 libtirpc multilib ncurses nls nptl openmp pam pcre pulseaudio readline seccomp ssl systemd tcpd unicode vaapi xattr 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" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd 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="karbon plan sheets stage words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 fma3 mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard synaptics evdev mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" POSTGRES_TARGETS="postgres9_5 postgres10" PYTHON_SINGLE_TARGET="python3_6" PYTHON_TARGETS="python2_7 python3_6" RUBY_TARGETS="ruby23" USERLAND="GNU" VIDEO_CARDS="intel i965" 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: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Created attachment 555064 [details] build.log There're too many errors, so I skipped some of them to make file <1000 KB.
Created attachment 555066 [details] build.log There're too many errors, so I skipped some of them to make file <1000 KB.
Created attachment 555068 [details] environment
Created attachment 555070 [details] environment
This was caused by the fact I have Python 3 compiled with -flto. This is fixed in newer perf versions. https://lore.kernel.org/patchwork/patch/962160/
Minor self-correction: in my case, both Python 2 and Python 3 are compiled with LTO, and perf seems to try to link to Python 2.
Building perf with -python works in this circumstances.
Since the problematic dev-util/perf versions are long gone from the portage tree, this problem is solved in a way.
