I configured with -

../gcc/configure --prefix=/usr/local/java --enable-languages=c,c++,java --with-ecj-jar=/Users/dir/gfortran/gcc/ecj.jar --enable-java-awt=gtk --enable-gtk-cairo --disable-multilib --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib

The build set for 10 hours at -

rm -f include-fixed/README
cp ../../gcc/gcc/../fixincludes/README-fixinc include-fixed/README
chmod a+r include-fixed/README
echo timestamp > stmp-int-hdrs
rm gcj-dbtool.pod jcf-dump.pod jv-convert.pod grmic.pod gcov.pod gcj.pod gfdl.pod gpl.pod cpp.pod gij.pod gc-analyze.pod fsf-funding.pod gcc.pod
mkdir powerpc-apple-darwin8.10.0/libgcc
Checking multilib configuration for libgcc...
Configuring stage 2 in powerpc-apple-darwin8.10.0/libgcc
configure: creating cache ./config.cache
checking for --enable-version-specific-runtime-libs... no
checking for a BSD-compatible install... /usr/bin/install -c
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking build system type... powerpc-apple-darwin8.10.0
checking host system type... powerpc-apple-darwin8.10.0
checking for powerpc-apple-darwin8.10.0-ar... ar
checking for powerpc-apple-darwin8.10.0-lipo... lipo
checking for powerpc-apple-darwin8.10.0-nm... /Users/dir/gfortran/ibin/./gcc/nm
checking for powerpc-apple-darwin8.10.0-ranlib... ranlib -c
checking for powerpc-apple-darwin8.10.0-strip... strip
checking whether ln -s works... yes
checking for powerpc-apple-darwin8.10.0-gcc... /Users/dir/gfortran/ibin/./gcc/xgcc -B/Users/dir/gfortran/ibin/./gcc/ -B/usr/local/java/powerpc-apple-darwin8.10.0/bin/ -B/usr/local/java/powerpc-apple-darwin8.10.0/lib/ -isystem /usr/local/java/powerpc-apple-darwin8.10.0/include -isystem /usr/local/java/powerpc-apple-darwin8.10.0/sys-include

^Cmake[2]: *** [configure-stage2-target-libgcc] Error 1
make[1]: *** [stage2-bubble] Interrupt
make: *** [all] Interrupt