=dev-libs/libxml2-2.9.4-r1 installs the Python extension into $ROOT/$ROOT if dev-lang/python:3.4 is also installed in $ROOT. It doesn't if Python isn't in $ROOT. This is obviously exquisitely wrong, as it fails to install the extension into a directory where Python can find it. It seems like the fix to Bug 582130 is to blame, as it passes $ROOT to ./configure Starting from empty ROOTs: # emerge --root=/binhost/x dev-libs/libxml2 ... >>> Installing (60 of 60) dev-libs/libxml2-2.9.4-r1::gentoo to /binhost/x/ ... # ls /binhost/x/binhost/x/usr/lib/python3.4/site-packages/ drv_libxml2.py libxml2.py libxml2mod.so # ls /binhost/x/binhost/x/usr/lib python3.4 # emerge --root=/binhost/x2 --nodep dev-libs/libxml2 ... >>> Installing (1 of 1) dev-libs/libxml2-2.9.4-r1::gentoo to /binhost/x2/ ... # ls /binhost/x2/binhost ls: cannot access '/binhost/x2/binhost': No such file or directory # emerge --info Portage 2.3.6 (python 2.7.12-final-0, default/linux/amd64/13.0/no-multilib, gcc-5.4.0, glibc-2.23-r4, 4.12.4-gentoo x86_64) ================================================================= System uname: Linux-4.12.4-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5-2630_v3_@_2.40GHz-with-gentoo-2.3 KiB Mem: 396183836 total, 379624400 free KiB Swap: 9764860 total, 9764860 free Timestamp of repository gentoo: Tue, 08 Aug 2017 06:30:01 +0000 sh bash 4.3_p48-r1 ld GNU ld (Gentoo 2.28 p1.2) 2.28 app-shells/bash: 4.3_p48-r1::gentoo dev-lang/perl: 5.24.1-r2::gentoo dev-lang/python: 2.7.12::gentoo, 3.4.5::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.3::gentoo sys-apps/openrc: 0.28::gentoo sys-apps/sandbox: 2.10-r3::gentoo sys-devel/autoconf: 2.69::gentoo sys-devel/automake: 1.15-r2::gentoo sys-devel/binutils: 2.28-r2::gentoo sys-devel/gcc: 5.4.0-r3::gentoo sys-devel/gcc-config: 1.7.3::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: 2.23-r4::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://192.168.1.21/gentoo-portage priority: -1000 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=corei7-avx" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=corei7-avx" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles getbinpkg merge-sync 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.netcologne.de/gentoo/ ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo http://de-mirror.org/distro/gentoo/" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j16" 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 bzip2 cli cracklib crypt cxx dri fortran gdbm git iconv iproute2 ipv6 modules ncurses nls nptl openmp pam pcre perl python readline seccomp session ssl tcpd unicode vim-syntax 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="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 pclmul 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="libinput keyboard 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" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby21 ruby22" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy 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" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
suggestions what to tweak welcome
I suspect this was resolved by a change made in libxml-2.9.9-r2. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3ac390cc82d42c6d50dcff61b9884dbf19b03e7d commit 3ac390cc82d42c6d50dcff61b9884dbf19b03e7d Author: Michał Górny <mgorny@gentoo.org> Date: Sat Dec 7 20:52:39 2019 +0100 dev-libs/libxml2: Ensure using correct Python sitedir Closes: https://bugs.gentoo.org/702016 Signed-off-by: Michał Górny <mgorny@gentoo.org> .../libxml2/{libxml2-2.9.9-r1.ebuild => libxml2-2.9.9-r2.ebuild} | 5 ++++-