Bugzilla Bug 138967

emerge -u --deep --newuse -pv world
[ebuild     U ] sys-libs/glibc-2.4-r3 [2.3.6-r3] USE="nls nptl nptlonly -build
-glibc-omitfp -hardened -profile"
......
......


While I upgrade sys-libs/glibc to 2.4-r3, I got this error message.
checking for long double... yes
checking size of long double... 8
running configure fragment for sysdeps/powerpc/powerpc32/elf
checking for powerpc32 TLS support... yes
running configure fragment for sysdeps/unix/sysv/linux/powerpc
checking whether powerpc-unknown-linux-gnu-gcc -mcpu=7400 -pipe
-freorder-blocks -O2 -mlong-double-128 uses IBM extended format... no
checking whether powerpc-unknown-linux-gnu-gcc -mcpu=7400 -pipe
-freorder-blocks -O2 supports -mabi=ibmlongdouble... no
configure: error: this configuration requires -mlong-double-128 IBM extended
format support

!!! ERROR: sys-libs/glibc-2.4-r3 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  glibc-2.4-r3.ebuild, line 1169:   Called toolchain-glibc_src_compile
  glibc-2.4-r3.ebuild, line 251:   Called glibc_do_configure 'nptl'
  glibc-2.4-r3.ebuild, line 941:   Called die

!!! failed to configure glibc
!!! If you need support, post the topmost build error, and the call stack if
relevant.


My emerge --info:
Portage 2.1-r1 (default-linux/ppc/ppc32/2006.0, gcc-3.4.6, glibc-2.3.6-r3,
2.6.15-gentoo-r1 ppc)
=================================================================
System uname: 2.6.15-gentoo-r1 ppc 7447A, altivec supported
Gentoo Base System version 1.6.15
dev-lang/python:     2.3.5-r2, 2.4.3-r1
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     [Not Present]
dev-util/confcache:  [Not Present]
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.59-r7
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2
sys-devel/binutils:  2.16.1-r3
sys-devel/gcc-config: 1.3.13-r2
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r4
ACCEPT_KEYWORDS="ppc"
AUTOCLEAN="yes"
CBUILD="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec -mabi=altivec
-mpowerpc-gfxopt"
CHOST="powerpc-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.4/env /usr/kde/3.4/share/config
/usr/kde/3.4/shutdown /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref
/usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo"
CXXFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec -mabi=altivec
-mpowerpc-gfxopt"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig ccache distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="ftp://ftp.nsysu.edu.tw/Linux/Gentoo
ftp://ftp.cdpa.nsysu.edu.tw/Gentoo/
http://distro.ibiblio.org/pub/linux/distributions/gentoo
ftp://ftp.planetmirror.com/pub/gentoo"
LANG="zh_TW"
LC_ALL="zh_TW.UTF-8"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude='/distfiles' --exclude='/local' --exclude='/packages'"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="ppc alsa altivec apache2 apm arts audiofile berkdb bitmap-fonts bonobo
bzip2 cdr cjk cli crypt cups curl dlloader dri dvd dvdr eds emboss encode esd
exif expat fbcon ffmpeg foomaticdb fortran gd gdbm gif gnome gpm gstreamer gtk
gtkhtml imap imlib innodb ipv6 isdnlog jpeg ldap libg++ libwww mad maildir
mhash mikmod motif mozilla mp3 mpeg mysql ncurses nls nptl nptlonly ogg opengl
pam pcre pdflib perl php png postgres pppd python qt3 qt4 quicktime readline
reflection ruby samba sasl2 sdl session snmp spell spl sqlite ssl tcpd tiff
truetype truetype-fonts type1-fonts udev unicode usb vhosts vorbis xine xml
xml2 xmms xorg xprint xv xvid zlib elibc_glibc input_devices_keyboard
input_devices_mouse input_devices_evdev kernel_linux userland_GNU"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS, LINGUAS,
PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY

THX for help.

you need to switch your compiler to gcc-4.1 first

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