The pie handling has changed for >=gcc-6.3.0, thus cross compilation of my avr project fails now. 5.4.0 did not enable -fPIC/-fPIE by default. I presume this could be fixed by remasking the flag for this architecture? The main issue is, that the linker fails due to the pie flag, so I can’t just override CFLAGS for the project, which would be annoying anyway. I’m compiling qmk_firmware with my not yet released keymap. Any keymap should reproduce this behaviour though. emerge --info cross-avr/gcc Portage 2.3.13 (python 3.4.5-final-0, hardened/linux/amd64, gcc-6.4.0, glibc-2.25-r9, 4.12.12-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-4.12.12-gentoo-x86_64-Intel-R-_Core-TM-_i5-4570_CPU_@_3.20GHz-with-gentoo-2.4.1 KiB Mem: 7150916 total, 997412 free KiB Swap: 8388604 total, 8284308 free Timestamp of repository gentoo: Tue, 21 Nov 2017 19:00:01 +0000 Head commit of repository gentoo: c4650ebdcd757450915d030fd44f0e643e3b730e 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 [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::gentoo, 3.4.5::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: 0.34.9::gentoo sys-apps/sandbox: 2.10-r4::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.15.1-r1::gentoo sys-devel/binutils: 2.29.1-r1::gentoo sys-devel/gcc: 5.4.0-r3::gentoo, 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: 4.4::gentoo (virtual/os-headers) sys-libs/glibc: 2.25-r9::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 sync-rsync-extra-opts: zeuch location: /usr/local/portage masters: gentoo priority: 0 abendbrot location: /var/lib/layman/abendbrot sync-type: laymansync sync-uri: https://github.com/stefan-gr/abendbrot.git masters: gentoo priority: 50 bobwya location: /var/lib/layman/bobwya sync-type: laymansync sync-uri: https://github.com/bobwya/miscellaneous_ebuilds.git masters: gentoo priority: 50 eclipse location: /var/lib/layman/eclipse sync-type: laymansync sync-uri: https://github.com/gentoo/eclipse-overlay.git masters: gentoo priority: 50 games-overlay location: /var/lib/layman/games-overlay sync-type: laymansync sync-uri: git://github.com/hasufell/games-overlay.git masters: gentoo priority: 50 gentoo-gpu location: /var/lib/layman/gentoo-gpu sync-type: laymansync sync-uri: https://github.com/sjnewbury/gentoo-gpu.git masters: gentoo priority: 50 gnu-elpa location: /var/lib/layman/gnu-elpa sync-type: laymansync sync-uri: gs-elpa gnu-elpa masters: gentoo priority: 50 grub2-themes location: /var/lib/layman/grub2-themes sync-type: laymansync sync-uri: https://github.com/gentoo/grub2-themes-overlay.git masters: gentoo priority: 50 jorgicio location: /var/lib/layman/jorgicio sync-type: laymansync sync-uri: https://github.com/jorgicio/jorgicio-gentoo.git masters: gentoo priority: 50 laurentb location: /var/lib/layman/laurentb sync-type: laymansync sync-uri: git://github.com/laurentb/gentoo-overlay.git masters: gentoo priority: 50 melpa location: /var/lib/layman/melpa sync-type: laymansync sync-uri: gs-elpa melpa masters: gnu-elpa gentoo priority: 50 melpa-stable location: /var/lib/layman/melpa-stable sync-type: laymansync sync-uri: gs-elpa melpa-stable masters: gnu-elpa gentoo priority: 50 rinaldus-overlay location: /var/lib/layman/rinaldus-overlay sync-type: laymansync sync-uri: https://github.com/rinaldus/rinaldus-overlay.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 vapoursynth location: /var/lib/layman/vapoursynth sync-type: laymansync sync-uri: https://github.com/4re/vapoursynth-portage.git masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mrtm -mhle -mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 --param l1-cache-size=32 --param l2-cache-size=6144 -mtune=haswell" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /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="-O2 -pipe -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mrtm -mhle -mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 --param l1-cache-size=32 --param l2-cache-size=6144 -mtune=haswell" DISTDIR="/mnt/platz/distfiles" EMERGE_DEFAULT_OPTS=" --autounmask-unrestricted-atoms=y --autounmask-keep-masks=y --buildpkg-exclude='virtual/* sys-kernel/*-sources' --jobs=4 --load-average=4.0 --usepkg y" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="ftp://ftp.fau.de/pub/mirrors/gentoo" LANG="de_DE.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j5 -l4.0" PKGDIR="/mnt/platz/pkgdir/" 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="X a52 aac acl acpi alsa amd64 audiofile avi berkdb bluetooth bzip2 cairo cdda cddb cdparanoia cdr cli cracklib crypt css cue cups cxx dbus djvu dri dv dvd dvdr dvdread emacs encode exif faac ffmpeg flac fontconfig foomaticdb ftp gd gdbm gif glamor gpm gstreamer gtk gtk3 hardened iconv id3tag imagemagick ipv6 irc jpeg jpeg2k justify ladspa ldap libass libnotify libwww lm_sensors logrotate lzo mad matroska mbox mng modules mp3 mpeg mtp multilib ncurses networkmanager nfs nls nptl nsplugin ogg oggvorbis openal openexr opengl openmp oscar pam pcre pdf pie png policykit portaudio qml qt3support qt5 quicktime raw readline samba sasl sdl seccomp session smp spell ssl ssp svg tcpd theora threads tiff truetype udev udisks unicode urandom usb v4l v4l2 vaapi vcd vdpau vhosts vorbis wavpack wimax wmf x264 x265 xanim xattr xcomposite xinerama xml xpm xtpax xv xvid 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="kexi words flow plan sheets stage tables krita karbon braindump author" 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" GRUB_PLATFORMS="pc efi-64" INPUT_DEVICES="libinput" KERNEL="linux" L10N="de en_US en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="de en_US en" LLVM_TARGETS="X86" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6 php7-0" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby22" 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, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS ================================================================= Package Settings ================================================================= cross-avr/gcc-6.4.0::zeuch was built with the following: USE="multilib nls nptl (pie) (ssp) (-altivec) -awt -cilk -cxx -debug -doc (-fixed-point) -fortran -gcj -go -graphite -hardened -jit -libssp -mpx -objc -objc++ -objc-gc -openmp (-pch) -pgo -regression-test -sanitize -vanilla -vtv" ABI_X86="(64)" CFLAGS="-O2 -pipe" CXXFLAGS=""
I forgot, that I had adapted package.env for getting qmk to work, so with the flag rename I had to update local env overrides and mask pie use flag for gcc. Got it to work using the following configuration, so maybe this helps anyone compiling unsupportive code: /etc/portage/package.env/custom cross-avr/avr-libc disablefPIC.conf disablepie.conf cross-avr/gcc disablefPIC.conf disablepie.conf cross-avr/binutils disablepie.conf enablefPIC.conf env configurations using respectively: -fno-PIC -fno-pic; -fno-PIE -fno-pie; -fPIC -fpic disablefPIC.conf; disablepie.conf; enablefPIC.conf /etc/portage/profile/package.use.mask/custom cross-avr/gcc pie Sorry for expecting support for my deviated configuration.
