i686-pc-linux-gnu-gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I/home/supernova/wthrowe/gentoo/var/tmp/portage/app-editors/emacs-24.3-r2/work/emacs-24.3/lib -I../src -I/home/supernova/wthrowe/gentoo/var/tmp/portage/app-editors/emacs-24.3-r2/work/emacs-24.3/src -march=native -O2 -pipe -ggdb -c careadlinkat.c ... {standard input}: Assembler messages: {standard input}:122: Error: symbol `pread64' is already defined make[2]: *** [careadlinkat.o] Error 1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42735 seems to suggest that this is a bug in old glibc which newer gcc is supposed to work around but isn't for some reason. $ rpm -qa | grep glibc glibc-headers-2.5-81.el5_8.4 glibc-devel-2.5-81.el5_8.4 glibc-common-2.5-81.el5_8.4 glibc-2.5-81.el5_8.4 $ emerge --info && emerge -pqv emacs !!! Your current profile is deprecated and not supported anymore. !!! Use eselect profile to update your profile. !!! Please upgrade to the following profile if possible: default/linux/x86/13.0 You may use the following command to upgrade: eselect profile set default/linux/x86/13.0 Portage 2.2.01.22013-prefix (prefix/linux/x86, gcc-4.7.2, unavailable, 2.6.18-308.11.1.el5PAE i686) ================================================================= System uname: Linux-2.6.18-308.11.1.el5PAE-i686-Intel-R-_Xeon-R-_CPU_5150_@_2.66GHz-with-redhat-5.8-Tikanga KiB Mem: 4145608 total, 353676 free KiB Swap: 3068404 total, 2258408 free Timestamp of tree: Fri, 14 Jun 2013 20:40:27 +0000 ld GNU ld (GNU Binutils) 2.23 app-shells/bash: 4.2_p39-r1 dev-lang/python: 2.7.3-r3, 3.3.0-r1 dev-util/cmake: 2.8.11.1 dev-util/pkgconfig: 0.28 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.12.4 sys-devel/binutils: 2.23 sys-devel/gcc: 4.6.3, 4.7.2-r1 sys-devel/gcc-config: 1.8-r00.1 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) Repositories: gentoo_prefix g-cpan ACCEPT_KEYWORDS="x86-linux ~x86-linux" ACCEPT_LICENSE="@FREE" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe -ggdb" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -O2 -pipe -ggdb" DISTDIR="/home/astrosun/wthrowe/tmp/distfiles" EMERGE_DEFAULT_OPTS="--ask" FCFLAGS="-O2 -march=i686 -pipe" FEATURES="assume-digests binpkg-logs clean-logs collision-protect compress-build-logs config-protect-if-modified distlocks ebuild-locks fixlafiles force-prefix merge-sync news parallel-fetch preserve-libs protect-owned sfperms splitdebug strict unknown-features-warn unmerge-orphans userfetch" FFLAGS="-O2 -march=i686 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="POSIX" LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu" MAKEOPTS="-j3" PKGDIR="/home/supernova/wthrowe/gentoo/usr/portage/packages" PORTAGE_CONFIGROOT="/home/supernova/wthrowe/gentoo/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/home/supernova/wthrowe/gentoo/var/tmp" PORTDIR="/home/supernova/wthrowe/gentoo/usr/portage" PORTDIR_OVERLAY="/home/supernova/wthrowe/gentoo/var/lib/g-cpan" SYNC="rsync://rsync.prefix.freens.org/gentoo-portage-prefix" USE="berkdb bindist bzip2 cli cracklib crypt cxx dri fortran gdbm iconv ipv6 modules mudflap ncurses nls nptl openmp pcre prefix readline session ssl tcpd unicode x86 zlib" ABI_X86="32" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 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" 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="keyboard mouse evdev" 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="php5-3" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" RUBY_TARGETS="ruby19 ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware 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: CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON [ebuild U ] app-editors/emacs-24.3-r2 [24.2] USE="-X -Xaw3d -alsa (-aqua) -athena -dbus -games -gconf -gif -gnutls (-gpm) -gsettings -gtk -gtk3 -gzip-el (-hesiod) -imagemagick -jpeg -kerberos -libxml2 -livecd (-m17n-lib) -motif -pax_kernel -png (-selinux) -sound -source -svg -tiff -toolkit-scroll-bars -wide-int -xft -xpm"
Same here during Prefix bootstrap with coreutils-8.22 here on RHEL 5.4 (glibc-2.5), this is because of the "-std=gnu99" compiler flag. However, there is the "-fgnu89-inline" compiler flag: available since gcc-4.1.3, necessary since gcc-4.3. I'm working on a profile.bashrc for Prefix to add this flag on such platforms for selected (=breaking) packages as a workaround for now. Seems like this is fixed since glibc-2.6.
(In reply to Michael Haubenwallner from comment #1) > for selected (=breaking) packages As the list of packages breaking with glibc-2.5 and older likely will grow over time, I'm adding -fgnu89-inline for each package now to profiles/prefix/linux/profile.bashrc (similar to how default-fortify-source is disabled for glibc-2.11 and older).
