can't emerge firefox on ppc

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hi list,

i just did an 'emerge system --deep --newuse -uv' which forced me to
unmerge firefox first since it was blocking something (but the update
went through without problems).

after that i tried to re-emerge firefox but it failed reproducibly.
these were ebuilds last words:

<snip>
gmake[4]: Entering directory
`/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla/dom/src/base'
nsDOMClassInfo.cpp
powerpc-unknown-linux-gnu-g++ -o nsDOMClassInfo.o -c
- -DOSTYPE=\"Linux2.6\" -DOSARCH=\"Linux\" -D_IMPL_NS_LAYOUT -I./../events
- -I../../../dist/include/xpcom -I../../../dist/include/string
- -I../../../dist/include/webbrwsr -I../../../dist/include/commandhandler
- -I../../../dist/include/js -I../../../dist/include/widget
- -I../../../dist/include/gfx -I../../../dist/include/layout
- -I../../../dist/include/content -I../../../dist/include/caps
- -I../../../dist/include/docshell -I../../../dist/include/xpconnect
- -I../../../dist/include/pref -I../../../dist/include/oji
- -I../../../dist/include/necko -I../../../dist/include/mimetype
- -I../../../dist/include/java -I../../../dist/include/locale
- -I../../../dist/include/uriloader -I../../../dist/include/xuldoc
- -I../../../dist/include/webshell -I../../../dist/include/view
- -I../../../dist/include/uconv -I../../../dist/include/shistory
- -I../../../dist/include/plugin -I../
../../dist/include/windowwatcher -I../../../dist/include/chardet
- -I../../../dist/include/find -I../../../dist/include/appshell
- -I../../../dist/include/intl -I../../../dist/include/unicharutil
- -I../../../dist/include/rdf -I../../../dist/include/xultmpl
- -I../../../dist/include/dom -I../../../dist/include
- -I/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla/dist/include/nspr
       -fPIC   -fno-rtti -fno-handle-exceptions -Wall -Wconversion
- -Wpointer-arith -Wcast-align -Woverloaded-virtual -Wsynth
- -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wno-long-long -pipe
- -Wno-deprecated -Wno-return-type -w -fshort-wchar -pthread -pipe
- -DNDEBUG -DTRIMMED -ffunction-sections -O2   -DMOZILLA_CLIENT -include
../../../mozilla-config.h -Wp,-MD,.deps/nsDOMClassInfo.pp nsDOMClassInfo.cpp
powerpc-unknown-linux-gnu-g++: Internal error: Killed (program cc1plus)
Please submit a full bug report.
See <URL:http://bugs.gentoo.org/> for instructions.
gmake[4]: *** [nsDOMClassInfo.o] Error 1
gmake[4]: *** Deleting file `nsDOMClassInfo.o'
gmake[4]: Leaving directory
`/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla/dom/src/base'
{standard input}: Assembler messages:
{standard input}:29282: Warning: end of file not at end of a line;
newline inserted
{standard input}:30197: Error: unrecognized symbol type ""
gmake[3]: *** [libs] Error 2
gmake[3]: Leaving directory
`/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla/dom/src'
gmake[2]: *** [libs] Error 2
gmake[2]: Leaving directory
`/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla/dom'
gmake[1]: *** [tier_9] Error 2
gmake[1]: Leaving directory
`/var/tmp/portage/mozilla-firefox-1.0.6-r2/work/mozilla'
make: *** [default] Error 2

!!! ERROR: www-client/mozilla-firefox-1.0.6-r2 failed.
!!! Function src_compile, Line 159, Exitcode 2
!!! (no error message)
!!! If you need support, post the topmost build error, NOT this status
message.

<snap>

here is what looks like what went wrong:
powerpc-unknown-linux-gnu-g++: Internal error: Killed (program cc1plus)

but i can't see any hint why this happened. i googled for this error
message but all i found were old posts about ancient gcc versions on
ancient red-hats that threw this error on compiling $foo.
so is there anyone on this list who has seen this before and can give me
a hint what to look for or what to rebuild before retrying to emerge
firefox another time?

regards,

alexander
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