As with 351648 (https://bugs.gentoo.org/show_bug.cgi?id=351648) memtest86+ only needs to compile 32-bit code but not link to any 32-bit libraries. GCC on !multilib can perform this with the only condition being that an empty /usr/include/gnu/stubs-32.h is present: /* This file is automatically generated. It defines a symbol `__stub_FUNCTION' for each function in the C library which is a stub, meaning it will fail every time called, usually setting errno to ENOSYS. */ #ifdef _LIBC #error Applications may not define the macro _LIBC #endif Perhaps the no-multilib glibc build could provide this file? With this in place memtest86+ will compile perfectly ok on amd64 !multilib. # emerge --info Portage 2.2.8-r1 (default/linux/amd64/13.0/no-multilib, gcc-4.7.3, glibc-2.17, 3.13.10 x86_64) ================================================================= System uname: Linux-3.13.10-x86_64-Six-Core_AMD_Opteron-tm-_Processor_2423_HE-with-gentoo-2.2 KiB Mem: 4043056 total, 750024 free KiB Swap: 16777212 total, 16630264 free Timestamp of tree: Fri, 16 May 2014 07:45:01 +0000 ld GNU ld (GNU Binutils) 2.23.2 ccache version 3.1.9 [enabled] app-shells/bash: 4.2_p45 dev-java/java-config: 2.2.0 dev-lang/python: 2.7.5-r3, 3.3.3 dev-util/ccache: 3.1.9-r3 dev-util/cmake: 2.8.12.2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13::<unknown repository>, 2.69 sys-devel/automake: 1.9.6-r3, 1.10.3, 1.11.6, 1.12.6, 1.13.4 sys-devel/binutils: 2.23.2 sys-devel/gcc: 4.6.3, 4.7.3-r1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.17 Repositories: gentoo x-portage ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=amdfam10 -O3 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /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-php5.5/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="-march=amdfam10 -O3 -pipe" DISTDIR="/misc/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps y" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs ccache 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://www.mirrorservice.org/sites/distfiles.gentoo.org http://gentoo.virginmedia.com http://gentoo.osuosl.org http://www.ibiblio.org/pub/Linux/distributions/gentoo" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_EXTRA_OPTS="--progress --stats" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="3dnow X Xaw3d aac aalib acl acpi aim alsa amd64 apache2 audiofile avi bash-completion berkdb bluetooth bmp bonobo bzip2 caps cdb cdr cjk cli consolekit cpdflib cracklib crypt cups curl cxx dba dbm dbus dga directfb divx4linux doc dri dts dvb dvd dvdr encode esd exif expat fam fbcon fftw flac flash foomaticdb fortran ftp gd gdbm gif gnome gphoto2 gpm gstreamer gtk gtk2 gtkhtml iconv icq imagemagick imap imlib innodb ipv6 irmc jabber jadetex java jbig joystick jpeg jpeg2k kde kerberos lcms ldap libedit libwww lirc lm_sensors mad maildir mailwrapper mhash mime ming mmx mng modules mp3 mpeg msn mysql ncurses nls nptl nptlonly offensive ogg openal opengl openmp oscar pam pcre pdf pdflib perl php png policykit postgres ppds pulseaudio python qt4 quicktime readline samba sasl sdl seamonkey semantic-desktop session slp snmp spell sse sse2 ssl svg tcl tcltk tcpd tetex theora tiff tk truetype udev unicode usb v4l2 videos vorbis wmf xattr xine xinerama xml xml2 xmp xpm xsl xv xvid yahoo zlib" ABI_X86="64" ALSA_CARDS="emu10k1 intel8x0" APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_core authn_dbd authn_dbm authn_default authn_file authz_core authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http remoteip rewrite setenvif slotmem_shm so socache_shmcb speling status unique_id unixd userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="canon" 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 ublox ubx" INPUT_DEVICES="evdev keyboard joystick mouse vmmouse" KERNEL="linux" LCD_DEVICES="mtxorb xosd text ncurses" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_GB cs de fr hu it ja pt" LIRC_DEVICES="hauppauge" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4 php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="fbdev vesa vga intel nv nvidia r128 radeon vmware v4l i915" 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, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, USE_PYTHON
i've dropped the masks as not even the stubs file should be needed. if you find that they are, then that's a diff bug, so please file a new one for it. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=44af36687bd3999f1a70905ded075737c9bf02a2
