I tryed compiling 3.4.0 , 3.4.1 and 3.4.1-r1 with multilib enabled but without success this is where it stops /var/tmp/portage/gcc-3.4.1-r1/work/build/gcc/xgcc -shared-libgcc -B/var/tmp/portage/gcc-3.4.1-r1/work/build/gcc/ -nostdinc++ -L/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src -L/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem /usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include -Winvalid-pch -Wno-deprecated -x c++-header -O2 -march=k8 -pipe -D_GNU_SOURCE -I/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/include -I/var/tmp/portage/gcc-3.4.1-r1/work/gcc-3.4.1/libstdc++-v3/libsupc++ /var/tmp/portage/gcc-3.4.1-r1/work/gcc-3.4.1/libstdc++-v3/include/stdc++.h -O0 -g -o ./x86_64-pc-linux-gnu/bits/stdc++.h.gch/O0g; \ /var/tmp/portage/gcc-3.4.1-r1/work/build/gcc/xgcc -shared-libgcc -B/var/tmp/portage/gcc-3.4.1-r1/work/build/gcc/ -nostdinc++ -L/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src -L/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem /usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include -Winvalid-pch -Wno-deprecated -x c++-header -O2 -march=k8 -pipe -D_GNU_SOURCE -I/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/include -I/var/tmp/portage/gcc-3.4.1-r1/work/gcc-3.4.1/libstdc++-v3/libsupc++ /var/tmp/portage/gcc-3.4.1-r1/work/gcc-3.4.1/libstdc++-v3/include/stdc++.h -O2 -g -o ./x86_64-pc-linux-gnu/bits/stdc++.h.gch/O2g; make[2]: Leaving directory `/var/tmp/portage/gcc-3.4.1-r1/work/build/x86_64-pc-linux-gnu/libstdc++-v3/include' make[1]: Leaving directory `/var/tmp/portage/gcc-3.4.1-r1/work/build' make: *** [profiledbootstrap] Error 2 !!! ERROR: sys-devel/gcc-3.4.1-r1 failed. !!! Function src_compile, Line 663, Exitcode 2 !!! (no error message) Reproducible: Always Steps to Reproduce: 1. 2. 3.
did you use FEATURES="-sandbox" USE="-gcj"? that's currently required to get multilib working. also, recompile without your MAKEOPTS so we can more clearly see the error.
need more info
USE="-gcj" and FEATURES="-sandbox" helped