compiling with gcc 5.3, I'm getting this error from ffmpeg: In file included from /var/tmp/portage/media-video/ffmpeg-2.8.6/work/ffmpeg-2.8.6/libavcodec/cabac_functions.h:46:0, from /var/tmp/portage/media-video/ffmpeg-2.8.6/work/ffmpeg-2.8.6/libavcodec/h264_cabac.c:37: /var/tmp/portage/media-video/ffmpeg-2.8.6/work/ffmpeg-2.8.6/libavcodec/cabac_functions.h: In function ‘get_cabac_noinline’: /var/tmp/portage/media-video/ffmpeg-2.8.6/work/ffmpeg-2.8.6/libavcodec/x86/cabac.h:192:5: error: ‘asm’ operand has impossible constraints __asm__ volatile( ^ I googled a bit but found no quick solutions. Reproducible: Always Portage 2.2.28 (python 3.4.3-final-0, default/linux/amd64/13.0/desktop/plasma/systemd, gcc-5.3.0, glibc-2.22-r3, 4.5.0-cova x86_64) ================================================================= System uname: Linux-4.5.0-cova-x86_64-Intel-R-_Core-TM-_i5-3427U_CPU_@_1.80GHz-with-gentoo-2.2 KiB Mem: 8091324 total, 742644 free KiB Swap: 8386556 total, 8321968 free Timestamp of repository gentoo: Sat, 02 Apr 2016 06:30:01 +0000 sh bash 4.3_p42-r2 ld ld di GNU (Gentoo 2.25.1 p1.1) 2.25.1 distcc[4970] (dcc_mkdir) ERROR: mkdir '/var/tmp/portage/.distcc//state' failed: No such file or directory [disabled] app-shells/bash: 4.3_p42-r2::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.22.1::gentoo dev-lang/python: 2.7.11-r2::gentoo, 3.3.5-r7::gentoo, 3.4.3-r7::gentoo, 3.5.1-r2::gentoo dev-util/cmake: 3.5.1::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.20.5::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r2::gentoo sys-devel/automake: 1.11.6-r2::gentoo, 1.12.6-r1::gentoo, 1.13.4-r1::gentoo, 1.14.1-r1::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.9.3::gentoo, 5.3.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r2::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 4.5::gentoo (virtual/os-headers) sys-libs/glibc: 2.22-r3::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 hacking-gentoo location: /var/lib/layman/hacking-gentoo sync-type: laymansync sync-uri: rsync://rsync.mad-hacking.net/hacking-gentoo-overlay/ masters: gentoo hacking-gentoo priority: 50 kde location: /var/lib/layman/kde sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/kde.git masters: gentoo priority: 50 local location: /usr/overlay masters: gentoo priority: 51 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -fpie -fpic -pipe -march=native -fstack-protector-strong -flto=4 -fuse-linker-plugin" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /etc/stunnel/stunnel.conf /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/easy-rsa /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.5/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 -fpie -fpic -pipe -march=native -fstack-protector-strong -flto=4 -fuse-linker-plugin" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs clean-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync 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://distfiles.gentoo.org" LANG="it_IT.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -O2 -fpie -fpic -pipe -march=native -fstack-protector-strong -flto=4 -fuse-linker-plugin" 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="3dnow 3dnowext 3dnowprefetch X \ a52 aac aalib acl acpi aim alsa amd64 apng ares asf ati audio audiofile avahi bash-completion berkdb bidi bl branding bri bzip2 cairo caps ccdda cdda cdr cjk cli cracklib crypt cups curl cxx dba dbus declarative device-mapper dga divx divx4linux dparanoia dri dts dv dvb dvd dvdr dvdread eap-sim edl egl emboss encode ethereal evdev exif expat faad fam fame fbcon ffmpeg fftw firefox flac force-cgi-redirect fortran ftp gallium garmin gd gdbm gif gimp glamor gles2 gmedia gmp gnutls gphoto2 gpm gps gsm gtk h264 h323 iconv icq icu idn ifp ilbc imagemagick imap innodb ipod iproute2 ipv6 ithreads jabber java javascript joystick jpeg kde kipi kontact kvm lastfm lcms ldap libcaca libnotify libvirtd live lm_sensors lua lvm lxc lzma lzo mad maildir matroska mbox mdnsresponder-compat mhash mime mjpeg mmap mmx mmxext mng modules mozdevelop mozilla mp3 mp4 mpeg msn mtp multilib mysql ncurses network networkmanager new-hpcups nfsv4 njb nls nptl nptlonly nsplugin offensive ofx ogg oggvorbis ogm openal openexr opengl openmp oscar pam pango parted pcap pcre pdf phonon php plasma plotutils png policykit ppds pulseaudio qemu qml qt3support qt4 qt5 readline real rtc ruby samba sasl sdl seccomp semantic-desktop semantic-destkop session sha512 sip slang slp smartcard sndfile snmp sox speex spell srt sse sse2 ssh ssl ssse3 startup-notification svg symlink systemd tcltk tcpd telepathy theora threads tiff tk tremor truetype udev udisks unicode upower usb utempter v4l v4l2 vaapi vcd vde vhosts video videos vim-syntax virt-network virtualbox vorbis wav webkit widgets wifi wimax wmf wmp wps wxwidgets wxwindows x264 xanim xattr xcb xcomposite xface xft xine xinerama xml xosd xpm xscreensaver xsl xulrunner xv xvid zeroconf zlib zpm" ABI_X86="64 32" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" DRACUT_MODULES="btrfs crypt crypt-gpg crypt-loop lvm plymouth systemd" 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 ublox ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="it en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4 python3_5" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby20 ruby21 ruby22 ruby23" USERLAND="GNU" VIDEO_CARDS="intel v4l" 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" USE_PYTHON="2.7 3.4" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
This appears to be due to -fpic compiler flag, fixed by removing offending flag from CFLAGS. Sorry for the noise, maybe this can be useful for others.
I get a similar failure, now that the 17.0 profile has -fPIC as default, if I'm not mistaken. I just rebuilt -e @world, and got caught by this.
Created attachment 508644 [details] Build log
Portage 2.3.13 (python 2.7.14-final-0, default/linux/amd64/17.0/desktop, gcc-6.4.0, glibc-2.25-r9, 4.13.16-gentoo x86_64) ================================================================= System uname: Linux-4.13.16-gentoo-x86_64-Intel-R-_Core-TM-_i7-6820HQ_CPU_@_2.70GHz-with-gentoo-2.4.1 KiB Mem: 32717544 total, 4315584 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Wed, 06 Dec 2017 16:44:56 +0000 Head commit of repository gentoo: f581b0fc359daeabed944cc691efdfb952122220 sh bash 4.3_p48-r1 ld GNU ld (Gentoo 2.29.1 p3) 2.29.1 distcc 3.2rc1 x86_64-pc-linux-gnu [enabled] ccache version 3.2.4 [disabled] app-shells/bash: 4.3_p48-r1::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.3::gentoo dev-lang/python: 2.7.14-r1::gentoo, 3.5.4-r1::gentoo, 3.6.3-r1::gentoo dev-util/ccache: 3.2.4::gentoo dev-util/cmake: 3.8.2::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.4.1-r2::gentoo sys-apps/openrc: 0.34.11::gentoo sys-apps/sandbox: 2.10-r4::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r2::gentoo, 1.12.6-r1::gentoo, 1.15.1-r1::gentoo sys-devel/binutils: 2.29.1-r1::gentoo sys-devel/gcc: 6.4.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers) sys-libs/glibc: 2.25-r9::gentoo Repositories: gentoo location: /usr/portage sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo.git priority: -1000 BoldAndBusted location: /usr/local/portage masters: gentoo johu location: /var/lib/layman/johu masters: gentoo priority: 50 pentoo location: /var/lib/layman/pentoo masters: gentoo priority: 50 rinaldus-overlay location: /var/lib/layman/rinaldus-overlay masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=skylake -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /etc/stunnel/stunnel.conf /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/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=skylake -O2 -pipe" DISTDIR="/dev/shm/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs candy distcc distcc-pump distlocks ebuild-locks fail-clean fixlafiles merge-sync multilib-strict news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.lug.udel.edu/pub/gentoo/ http://mirrors.rit.edu/gentoo/ http://cosmos.illinois.edu/pub/gentoo/ http://www.gtlib.gatech.edu/pub/gentoo" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j8" 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="/dev/shm" USE="256-color 64bit X Xaw3d a52 aac aalib acl acpi additions admin adobe-cff ads aes aften agg aio alsa amd64 amr ao aot ap apache2 api apng asf asn aspell ass audio augeas autoipd avahi avcodec avformat avi avx background bash-completion bat berkdb blksha1 bluetooth bolddiag branding browserplugin btree btrfs bzip2 cairo caps cdda cdparanoia cdr celt chardet chromium clang classic cleartype cli client colordiff console consolekit context contrast cplugins cpufreq_bench cracklib cramfs crypt cryptopp css ctype cups curl custom-optimization cxx dbus development device-mapper dga dia dirac directfb distinct-l divx dm dmi dns dri dri3 dtmf dts dv dvd dvdr dvdread eap-sim edd edit efax eigen emboss enca encode epub escreen eselect ethereal eurehpia eurephia exif extensions externa-fuse extra extrafilters faac faad fading-colors fam fame fastcgi fastscroll fat faxonly fbcon fbcondecor fdt festival ffmpeg fftw filter filters firefox flac flash focused-urgency font-server font-styles fontconfig foomaticdb fortran fpm freetype frontendonly ftdi fts3 fuse gallium garmin gcrypt gd gdal gdbm gecko gedit gensplash geo gif gimp gimpprint glade glamor glew glib glitz gmedia gmp gnome-keyring gnuplot gnutls go gpl gpm gps gpsd_user grammar graphics graphviz gs gsf gsm gtk gtk2 gtk3 gtkhtml gudev gutenprint h224 h281 h323 haptic hardenedphp hash hfs highlight howl-compat hpcups hpijs http httpd hwdb iax icedtea7 iconv icu id3tag ide idn ieee1394 ilbc imagemagick imap imlib infinality inkjar inotify introspection ipc ipv6 irc irda ivr ixj jabber jack jadetex java javascript jbig jbootstrap jfs jikes jingle john joystick jp2 jpeg jpeg2k json kate keymap kmod kvm ladspa lame lapack laptop lash latex lcms ldap lensfun libass libev libevent libgcrypt libgda libkms libnl libnotify librsync-bundled libv4l2 libvirtd lid lightning live lm_sensors logrotate loop-aes lpsol lua lvm lxc lzo lzw-tiff mad maildir mapnik matroska mbrola mcal mdadm mdb mdnsresponder-compat menubar metapost methodjit mhash midi mime minizip mjpeg mmap mms mmx mmxext mng modules monitor mono monolithic motif mousewheel mozbranding mozdevelop mozilla mozsvg mp2 mp3 mp4 mp4live mpeg mpeg2 mplayer mpm-worker mpx mso mta mtp multilib mysql mysqli mysqlnd mythtv nas natspec ncat ncurses ndiff net netlink network new-hpcups new-login nfsv41 nls nocd notification nping nptl nptlonly nsplugin nss ntfs ntfsprogs ntp nut nx odbc offensive ogg ogg123 oggvorbis old-daemons old-output omega opencl openexr opengl openmp openrc openssl openstreetmap opus osdmenu osmesa ots overlay overlays p2p pae pam pam_timestamp pango pcap pcf pcmcia pcntl pcre pcre16 pda pdf pdfannotextractor pixbuf plotutils plugin plugins plymouth pmu png pnm pnp policykit portaudio posix postproc postscript ppds prediction printsupport proprietary-codecs psf pulseaudio pvr python q16 qemu qemu-fast qemu-ifup qt5 quesoglc quicktime radosgw raptor raw rdesktop-vrdp rdp readline real realtime reflection reiserfs replytolist resolvconf rpc rsxs rtc rtmp rtsp ruby rule_generator run-exes s3tc samba sasl sbc scanner schroedinger script scripting scripts sdk sdl sdl-image sdl-sound sdl2 seccomp secure-delete sensord session sha512 shared-glapi shm shmvideo shout silc simplexml sip sipim skype slideshow slit slp smbclient smi smp sna sndfile snmp soap sockets socks socks5 softmmu sound speech speex spell spice spl split-ucode sqlite sqlite3 srtp sse sse2 sse2check sse4_1 ssh ssl ssse3 staging stars startup-notification static-user stats status stream stun suidcheck svc svg swscale sysfs system-sqlite systemtap taglib tagsoup tcl tcpdns templates tex4ht themes theora thesaurus thin threads threadsafe tidy tiff timidity tk tls tokenizer tokyocabinet toolame toolbar tools tracepath tremor truetype truetype-fonts tts twolame type1-fonts udev ulaw umfpack uml unicode unicode3 unlock-notify upcall upower urandom usb usbredir utils uvm uxa v4l v4l2 vaapi vamp vde vdpau vf-dlopen vhost-net video vim vim-pager vim-syntax vim-with-x virt-network virtualbox vlm vnc vorbis vpx vte vxml watchdog wav wavpack webdav webdav-neon webkit webm webp webstart widevine widgets wifi winbind wma wmf wmp wordperfect wps wxwidgets wxwindows x264 x265 xanim xattr xcap xcb xchattext xcomposite xetex xext xforms xfs xft xine xinerama xkb xml xml2 xmlrpc xmp xorg xosd xpdf-headers xpm xrandr xscreensaver xterm-color xulrunner xv xvfb xvid xvmc yahoo yaml yv12 zeroconf zip zlib zrtp zvbi" ABI_X86="32 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="dav dir authz_host mime" CALLIGRA_FEATURES="braindump flow karbon kexi krita sheets stage words" CAMERAS="*" COLLECTD_PLUGINS="apache apcups battery bind conntrack contextswitch cpu cpufreq csv curl curl_json curl_xml df disk dns email entropy ethstat exec filecount fscache hddtemp interface iptables irq java libvirt load logfile match_empty_counter match_hashed match_regex match_timediff match_value mbmon md memory multimeter mysql netlink network nfs notify_desktop notify_email ntpd numa openvpn ping processes protocols rrdcached rrdtool sensors serial snmp swap syslog table tail target_notification target_replace target_scale target_set tcpconns ted thermal unixsock uptime users uuid vmem wireless write_graphite write_http" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" CURL_SSL="openssl" 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 clientdebug" INPUT_DEVICES="libinput keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="pdfimport presenter-console presenter-minimizer wiki-publisher" LINGUAS="en_US" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5_3" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" QEMU_SOFTMMU_TARGETS="x86_64 i386 arm" QEMU_USER_TARGETS="x86_64 i386 armeb arm" RUBY_TARGETS="ruby21 ruby22" USERLAND="GNU" VIDEO_CARDS="nouveau intel i915 i965" VOICEMAIL_STORAGE="file" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Hi, I'm trying to reproduce this issue (with no success yet). Hang on :)
Jesse, First, my respect to you for using Gentoo in production! (Glanced at your website.) I couldn't reproduce your issue, even though this snippet is supposed to closely replicate your configuration: https://gist.github.com/andrey-utkin/15b7c22d9de05692a48298c2d9801aab . I suppose there may be some CPU features detection at configure time. Could you please perform the following testing? 1. Retest with latest available ffmpeg ebuild, 3.4. Seems nothing changed in faulty code, but just in case. 2. Share your /var/tmp/portage/media-video/ffmpeg-3.4/work/ffmpeg-3.3.5-abi_x86_32.x86/config.h 3. Find the build.log line compiling libpostproc/postprocess.c, and change it to produce preprocessed C code, like x86_64-pc-linux-gnu-cpp -m32 ... -o libpostproc/postprocess.cpp libpostproc/postprocess.c Taking your build.log as an example, that would be x86_64-pc-linux-gnu-cpp -m32 -I. -Isrc/ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -DZLIB_CONST -DHAVE_AV_CONFIG_H -march=skylake -O2 -pipe -march=skylake -std=c11 -fomit-frame-pointer -fPIC -pthread -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/fribidi -I/usr/include/glib-2.0 -I/usr/lib32/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/freetype2 -I/usr/include/freetype2 -I/usr/include/opus -D_REENTRANT -I/usr/include/schroedinger-1.0 -I/usr/include/orc-0.4 -I/usr/include/samba-4.0 -D_REENTRANT -I/usr/include/SDL2 -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -Wno-unused-const-variable -march=skylake -O2 -pipe -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wno-maybe-uninitialized -o libpostproc/postprocess.cpp src/libpostproc/postprocess.c 4. Run this command, and share the produced libpostproc/postprocess.cpp As a workaround, I'd propose to play with CPU_FLAGS_X86 to find a combination not triggering this failure.
See my comment in https://bugs.gentoo.org/show_bug.cgi?id=645778#c5
should have been fixed by https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6a2691a2bb66bd0497e458b0a00414507e8e99c0
