If you want a release build with all optimizations active (LTO, PGO, etc),
please run ./configure --enable-optimizations


 * configure has detected that the sem_open function is broken.
 * Please ensure that /dev/shm is mounted as a tmpfs with mode 1777.
 * ERROR: dev-lang/python-2.7.14-r1::libressl failed (configure phase):
 *   Broken sem_open function (bug 496328)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_configure
 *   environment, line 3712:  Called die
 * The specific snippet of code:
 *           die "Broken sem_open function (bug 496328)";
 * 
 * If you need support, post the output of `emerge --info '=dev-lang/python-2.7.14-r1::libressl'`,
 * the complete build log and the output of `emerge -pqv '=dev-lang/python-2.7.14-r1::libressl'`.
 * The complete build log is located at '/var/tmp/portage/dev-lang/python-2.7.14-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-lang/python-2.7.14-r1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-lang/python-2.7.14-r1/work/x86_64-gentoo-linux-musl'
 * S: '/var/tmp/portage/dev-lang/python-2.7.14-r1/work/Python-2.7.14'

>>> Failed to emerge dev-lang/python-2.7.14-r1, Log file:

>>>  '/var/tmp/portage/dev-lang/python-2.7.14-r1/temp/build.log'

 * Messages for package sys-fs/eudev-3.2.5:

 * 
 * As of 2013-01-29, eudev-3.2.5 provides the new interface renaming functionality,
 * as described in the URL below:
 * https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames
 * 
 * This functionality is enabled BY DEFAULT because eudev has no means of synchronizing
 * between the default or user-modified choice of sys-fs/udev.  If you wish to disable
 * this new iface naming, please be sure that /etc/udev/rules.d/80-net-name-slot.rules
 * exists: touch /etc/udev/rules.d/80-net-name-slot.rules
 * 

 * Messages for package sys-apps/busybox-1.28.0:

 * Could not locate user configfile, so we will save a default one
 * Your configuration for sys-apps/busybox-1.28.0 has been saved in 
 * /etc/portage/savedconfig/sys-apps/busybox-1.28.0 for your editing pleasure.
 * You can edit these files by hand and remerge this package with
 * USE=savedconfig to customise the configuration.
 * You can rename this file/directory to one of the following for
 * its configuration to apply to multiple versions:
 * ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/
 * [${CTARGET}|${CHOST}|""]/${CATEGORY}/[${PF}|${P}|${PN}]

 * Messages for package sys-apps/sysvinit-2.88-r9:

 * The last/lastb/mesg/mountpoint/sulogin/utmpdump/wall tools have been moved to
 * sys-apps/util-linux. The pidof tool has been moved to sys-process/procps.

 * Messages for package dev-vcs/git-2.16.4:

 * These additional scripts need some dependencies:
 *   git-quiltimport  : dev-util/quilt
 *   git-instaweb     : || ( www-servers/lighttpd www-servers/apache www-servers/nginx )

 * Messages for package sys-apps/coreutils-8.28-r1:

 * Make sure you run 'hash -r' in your active shells.
 * You should also re-source your shell settings for LS_COLORS
 *   changes, such as: source /etc/profile

 * Messages for package sys-devel/gcc-5.4.0-r4:

 * If you have issues with packages unable to locate libstdc++.la,
 * then try running 'fix_libtool_files.sh' on the old gcc versions.
 * You might want to review the GCC upgrade guide when moving between
 * major versions (like 4.2 to 4.3):
 * https://wiki.gentoo.org/wiki/Upgrading_GCC

 * Messages for package sys-devel/gcc-4.9.4-r100:

 * If you have issues with packages unable to locate libstdc++.la,
 * then try running 'fix_libtool_files.sh' on the old gcc versions.
 * You might want to review the GCC upgrade guide when moving between
 * major versions (like 4.2 to 4.3):
 * https://wiki.gentoo.org/wiki/Upgrading_GCC

 * Messages for package dev-lang/python-2.7.14-r1:

 * configure has detected that the sem_open function is broken.
 * Please ensure that /dev/shm is mounted as a tmpfs with mode 1777.
 * ERROR: dev-lang/python-2.7.14-r1::libressl failed (configure phase):
 *   Broken sem_open function (bug 496328)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_configure
 *   environment, line 3712:  Called die
 * The specific snippet of code:
 *           die "Broken sem_open function (bug 496328)";
 * 
 * If you need support, post the output of `emerge --info '=dev-lang/python-2.7.14-r1::libressl'`,
 * the complete build log and the output of `emerge -pqv '=dev-lang/python-2.7.14-r1::libressl'`.
 * The complete build log is located at '/var/tmp/portage/dev-lang/python-2.7.14-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-lang/python-2.7.14-r1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-lang/python-2.7.14-r1/work/x86_64-gentoo-linux-musl'
 * S: '/var/tmp/portage/dev-lang/python-2.7.14-r1/work/Python-2.7.14'

 * Regenerating GNU info directory index...
 * Processed 80 info files.

!!! existing preserved libs:
>>> package: dev-libs/openssl-1.0.2o-r3
 *  - /usr/lib/libssl.so.1.0.0
 *      used by /usr/lib/libcurl.so.4.5.0 (net-misc/curl-7.60.0)
 *      used by /usr/lib/python2.7/lib-dynload/_ssl.so (dev-lang/python-2.7.14-r1)
 *      used by /usr/lib/python3.5/lib-dynload/_ssl.cpython-35m-x86_64-linux-gnu.so (dev-lang/python-3.5.5)
 *  - /usr/lib/libcrypto.so.1.0.0
 *      used by /usr/bin/ssh (net-misc/openssh-7.7_p1-r5)
 *      used by /usr/bin/ssh-add (net-misc/openssh-7.7_p1-r5)
 *      used by /usr/bin/ssh-agent (net-misc/openssh-7.7_p1-r5)
 *      used by 10 other files
Use emerge @preserved-rebuild to rebuild packages using these libraries

 * IMPORTANT: config file '/etc/hosts' needs updating.
 * See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS
 * sections of the emerge man page to learn how to update config files.

 * IMPORTANT: 12 news items need reading for repository 'gentoo'.
 * Use eselect news read to view new items.

 * After world updates, it is important to remove obsolete packages with
 * emerge --depclean. Refer to `man emerge` for more information.