G5 ~ # emerge libstdc++-v3
Calculating dependencies ...done!
>>> emerge (1 of 1) sys-libs/libstdc++-v3-3.3.4 to /
>>> md5 src_uri ;-) gcc-3.3.4.tar.bz2
>>> Unpacking source...
>>> Unpacking gcc-3.3.4.tar.bz2 to /var/tmp/portage/libstdc++-v3-3.3.4/work
 * Patching ${S}/ltmain.sh ...
 *   Applying portage-1.4.1.patch ...
 *   Applying relink-1.4.0a-GCC3.0-2.patch ...
 *   Applying sed-1.4.3.patch ...
 *   Applying tmp-1.3.5.patch ...
 * Applying uClibc/libtool patches ...
 *  Fixing ${S}/ltconfig ...                                                                                     [ ok ]
 *  Fixing ${S}/boehm-gc/ltconfig ...                                                                            [ ok ]
 * Using GNU config files from /usr/share/libtool
 *  Updating config.sub                                                                                          [ ok ]
 *  Updating boehm-gc/config.sub                                                                                 [ ok ]
 *  Updating config.guess                                                                                        [ ok ]
 *  Updating boehm-gc/config.guess                                                                               [ ok ]
 *  Updating gcc/config.guess                                                                                    [ ok ]
>>> Source unpacked.
QA Notice: USE Flag 'build' not in IUSE for sys-libs/libstdc++-v3-3.3.4
 * CFLAGS=" -mcpu=7400 -O2 -pipe"
 * CXXFLAGS=" -mcpu=7400 -O2 -pipe"
 * Configuring libstdc++...
*** This configuration is not supported in the following subdirectories:
     target-libffi target-libf2c target-boehm-gc target-zlib target-libjava zlib fastjar target-libobjc
    (Any other directories should still work fine.)
Created "Makefile" in /var/tmp/portage/libstdc++-v3-3.3.4/work/build using "mt-frag"
conftest.c: In function `main':
conftest.c:1: error: insn does not satisfy its constraints:
(jump_insn 29 28 30 0 (parallel [
            (return)
            (use (reg:DI 65 lr))
        ]) 574 {*return_internal_di} (nil)
    (expr_list:REG_DEAD (reg:SI 66 ctr)
        (nil)))
conftest.c:1: internal compiler error: in copyprop_hardreg_forward_1, at regrename.c:1549
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
Preprocessed source stored into /var/tmp/portage/libstdc++-v3-3.3.4/temp/ccci8fo9.out file, please attach this to your bugreport.
*** The command 'gcc -o conftest  -mcpu=7400 -O2 -pipe   conftest.c' failed.
*** You must set the environment variable CC to a working compiler.

!!! ERROR: sys-libs/libstdc++-v3-3.3.4 failed.
!!! Function src_compile, Line 219, Exitcode 1
!!! (no error message)
!!! If you need support, post the topmost build error, NOT this status message.

G5 ~ #