sys-apps/mount-gtk fails during the configure phase, apparently because it does not explicitly set the C++ standard to be used (which must either be -std=c++0x or -std=c++11), so that g++ defaults to C++98, which doesn't support the feature being tested. A snippet from the config.log: configure:8494: result: yes configure:8505: checking for C++11 range-for support configure:8532: x86_64-pc-linux-gnu-g++ -c -O2 -march=native -pipe -fexceptions -frtti -fsigned-char -fno-check-new -pthread conftest.cpp >&5 conftest.cpp: In function 'int main()': conftest.cpp:36:18: error: ISO C++ forbids declaration of 'elt' with no type [-fpermissive] conftest.cpp:36:23: error: range-based-for loops are not allowed in C++98 mode I also saw some configure tests that check for -std=c++11/c++0x support, but they were not run before the error, so maybe the test order is just wrong? I don't know anything about autoconf myself, so I can't say. There's also a patch at $URL that I haven't tested. Reproducible: Always Steps to Reproduce: 1. emerge -1 mount-gtk (after unmasking the necessary deps) Actual Results: emerge fails during the configure phase. Expected Results: emerge succeeds emerge --info mount-gtk Portage 2.2.1 (default/linux/amd64/13.0, gcc-4.6.3, glibc-2.15-r3, 3.10.7-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.10.7-gentoo-x86_64-Intel-R-_Core-TM-_i3_CPU_M_350_@_2.27GHz-with-gentoo-2.2 KiB Mem: 1910312 total, 428468 free KiB Swap: 8191996 total, 7923924 free Timestamp of tree: Sun, 08 Sep 2013 15:15:01 +0000 ld GNU ld (GNU Binutils) 2.23.1 app-shells/bash: 4.2_p45 dev-lang/python: 2.7.5-r2, 3.2.5-r2 dev-util/cmake: 2.8.10.2-r2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.10.3, 1.11.6, 1.12.6, 1.13.4 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.6.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.15-r3 Repositories: gentoo science proaudio mjoliet Installed sets: @audio-base, @desktop-apps, @desktop-base, @desktop-misc, @devel-audio, @devel-base, @devel-python, @latex, @local-arthur, @science, @sys-base, @sys-utils ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=native -pipe" 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/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 -march=native -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps=y --quiet-build=y --nospinner" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-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="ftp://de-mirror.org/gentoo/ ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo ftp://mirror.netcologne.de/gentoo/" LANG="de_DE.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-s -j5" PKGDIR="/usr/portage/packages" PORTAGE_COMPRESS="xz" PORTAGE_COMPRESS_FLAGS="-9" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/var/lib/layman/science /var/lib/layman/pro-audio /usr/local/portage/marcec" SYNC="rsync://rsync.de.gentoo.org/gentoo-portage" USE="3dnow 3dnowext X a52 aac acl acpi alsa amd64 avahi berkdb branding bzip2 cairo caps cdinstall cjk cli consolekit cracklib crypt css cups cxx dbus dga djvu dri dssi dts dvd encode exif fbcon ffmpeg fftw flac fortran ftp fuse gdbm gif gmp gnuplot gnutls gtk iconv idn imlib inotify ipv6 jack jackmidi jpeg jpeg2k kipi ladspa lapack lash latex lcms libnotify libsamplerate logrotate lzma mad mjpeg mmx mmxext mng modplug modules mp3 mp4 mpeg mudflap multilib musepack musicbrainz ncurses nfs nls nptl ntp offensive ogg openexr opengl openmp opus osc pam pango pcre pdf plotutils png policykit pulseaudio qt4 quicktime rar readline rtsp samba sasl session sid slang smp sndfile speex spell sse sse2 sse3 sse4 ssl ssse3 startup-notification svg sysfs taglib tcpd theora threads tiff timidity truetype unicode usb v4l vaapi vdpau vim-syntax vorbis vpx webkit wma x264 xattr xcb xcomposite xface xft xml xmp xpm xscreensaver xv xvid zeroconf zlib zsh-completion" ABI_X86="64" ALSA_CARDS="hda-intel usb-audio" 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" 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 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="en_US en en_GB de" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="intel vesa" 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_RSYNC_EXTRA_OPTS, USE_PYTHON
Created attachment 358298 [details] build.log
Created attachment 358300 [details] config.log
It seems somebody didn't thought things through deeply enough. AC_CHECK_COMPILERS runs all the required checks...as long CXXFLAGS aren't set. :sigh: The patch referenced is both OK *and* a bit pointless for this reason.
What does "if gcc is installed, gcc >= 4.6 required" mean in the summary? The user already had gcc-4.6 as per `emerge --info` in Comment #0
(In reply to Samuli Suominen from comment #4) > What does "if gcc is installed, gcc >= 4.6 required" mean in the summary? > The user already had gcc-4.6 as per `emerge --info` in Comment #0 That's what configure prints out. acinclude.m4: AC_MSG_ERROR([compiler does not support C++11 range-for expressions - if gcc is installed, gcc >= 4.6 required]) conftest.cpp: In function 'int main()': conftest.cpp:36:12: warning: 'auto' will change meaning in C++0x; please remove it [-Wc++0x-compat] conftest.cpp:36:18: error: ISO C++ forbids declaration of 'elt' with no type [-fpermissive] conftest.cpp:36:23: error: range-based-for loops are not allowed in C++98 mode The real reason is one of the above two...
ahok, thanks, didn't realize it was the actual message. :/
(In reply to Samuli Suominen from comment #6) > ahok, thanks, didn't realize it was the actual message. :/ In light of above: AC_CHECK_COMPILERS I referred to is a private macro of this package (in acinclude.m4, IIRC), not (as the name could suggest) an externally provided one.
added the patch from http://sourceforge.net/p/mount-gtk/discussion/910829/thread/fd0c210d/ with ax_check_compile_flag.m4 to package's m4/ directory from autoconf-archive so now -std=c++11 is only added to CXXFLAGS when it's supported by the compiler all of this stems from the package's acinclude.m4 being broken in a way that environment CXXFLAGS override everything acinclude.m4 tries to add, and to workaround the broken behavior, i've used append-cxxflags that always added the -std=c++11 to CXXFLAGS, which was a stupid idea :/ hopefully it's solved for you now: 22 Jun 2014; Samuli Suominen <ssuominen@gentoo.org> +files/mount-gtk-1.4.2-c++11.patch, mount-gtk-1.4.2.ebuild: Include patch from upstream forums that checks if -std=c++11 is supported or not wrt #484264 by Marc Joliet
