Pierre Léonard <pierre.leonard@xxxxxxxxxxxx> writes: > ../configure --prefix=/usr/local/ --with-gnu-as > --with-as=/usr/sfw/bin/gas --without-gnu-ld --with-ld=/usr/ccs/bin/ld > --enable-shared --enable-languages=c,c++ --with-cpu-64=athlon64-sse3 > --with-gmp=/home/pleonard/math64 --with-mpfr=/home/pleonard/math64 > --enable-build-with-cxx --with-mpc=/home/pleonard/math64 > --enable-bootstrap The --enable-build-with-cxx option is experimental. It looks like you are running into trouble with it. In particular, you almost certainly have to build and install gcc without --enable-build-with-cxx, and then use that newly installed g++ to build gcc with --enable-build-with-cxx. Ian