This error occurs well into the stage 2 of the bootstrap process. Here are the specifics : configure line used was ../gcc-4.2.3/configure --with-as=/home/dclarke/local/bin/as --with-ld=/home/dclarke/local/bin/ld --enable-threads=posix --disable-nls --prefix=/home/dclarke/local --with-local-prefix=/home/dclarke/local --enable-shared --enable-languages=c,c++,objc,fortran --with-gmp=/home/dclarke/local --with-mpfr=/home/dclarke/local --enable-bootstrap GNU Binutils 2.18 GNU Make 3.81 flex 2.5.35 autoconf (GNU Autoconf) 2.61 automake (GNU automake) 1.10.1 Both GMP and MPFR are built and pass all tests and the libraries are created fine : gmp-4.2.2 mpfr-2.3.1 dclarke@vesta:~/build/first_pass/gcc/gcc-4.2.3-build$ ls -lap $HOME/local/lib | grep -E "gmp|mpfr" -rw-r--r-- 1 dclarke csw 592016 Mar 9 17:48 libgmp.a -rwxr-xr-x 1 dclarke csw 794 Mar 9 17:48 libgmp.la lrwxrwxrwx 1 dclarke csw 15 Mar 9 17:48 libgmp.so -> libgmp.so.3.4.2 lrwxrwxrwx 1 dclarke csw 15 Mar 9 17:48 libgmp.so.3 -> libgmp.so.3.4.2 -rwxr-xr-x 1 dclarke csw 317869 Mar 9 17:48 libgmp.so.3.4.2 -rw-r--r-- 1 dclarke csw 1812424 Mar 9 22:06 libmpfr.a -rwxr-xr-x 1 dclarke csw 985 Mar 9 22:06 libmpfr.la lrwxrwxrwx 1 dclarke csw 16 Mar 9 22:06 libmpfr.so -> libmpfr.so.1.1.1 lrwxrwxrwx 1 dclarke csw 16 Mar 9 22:06 libmpfr.so.1 -> libmpfr.so.1.1.1 -rwxr-xr-x 1 dclarke csw 985371 Mar 9 22:06 libmpfr.so.1.1.1 dclarke@vesta:~/build/first_pass/gcc/gcc-4.2.3-build$ existing GCC was : dclarke@vesta:~/build/first_pass/gcc/gcc-4.2.3-build$ gcc -v Using built-in specs. Target: powerpc-linux-gnu Configured with: ../src/configure -v --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug --enable-mpfr --disable-softfloat --enable-targets=powerpc-linux,powerpc64-linux --with-cpu=default32 --enable-checking=release powerpc-linux-gnu Thread model: posix gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) Stage 1 of the bootstrap process resulted in this : dclarke@vesta:~/build/first_pass/gcc/gcc-4.2.3-build$ /home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/gcc/xgcc -v Using built-in specs. Target: powerpc-unknown-linux-gnu Configured with: ../gcc-4.2.3/configure --with-as=/home/dclarke/local/bin/as --with-ld=/home/dclarke/local/bin/ld --enable-threads=posix --disable-nls --prefix=/home/dclarke/local --with-local-prefix=/home/dclarke/local --enable-shared --enable-languages=c,c++,objc,fortran --with-gmp=/home/dclarke/local --with-mpfr=/home/dclarke/local --enable-bootstrap Thread model: posix gcc version 4.2.3 The ERROR in stage 2 was thus : checking for powerpc-unknown-linux-gnu-gfortran... /home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/./gcc/gfortran -B/home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/./gcc/ -B/home/dclarke/local/powerpc-unknown-linux-gnu/bin/ -B/home/dclarke/local/powerpc-unknown-linux-gnu/lib/ -isystem /home/dclarke/local/powerpc-unknown-linux-gnu/include -isystem /home/dclarke/local/powerpc-unknown-linux-gnu/sys-include checking whether we are using the GNU Fortran compiler... no checking whether /home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/./gcc/gfortran -B/home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/./gcc/ -B/home/dclarke/local/powerpc-unknown-linux-gnu/bin/ -B/home/dclarke/local/powerpc-unknown-linux-gnu/lib/ -isystem /home/dclarke/local/powerpc-unknown-linux-gnu/include -isystem /home/dclarke/local/powerpc-unknown-linux-gnu/sys-include accepts -g... no checking whether the GNU Fortran compiler is working... no configure: error: GNU Fortran is not working; the most common reason for that is that you might have linked it to shared GMP and/or MPFR libraries, and not set LD_LIBRARY_PATH accordingly. If you suspect any other reason, please report a bug in http://gcc.gnu.org/bugzilla, attaching /home/dclarke/build/first_pass/gcc/gcc-4.2.3-build/powerpc-unknown-linux-gnu/libgfortran/config.log make[1]: *** [configure-target-libgfortran] Error 1 make[1]: Leaving directory `/home/dclarke/build/first_pass/gcc/gcc-4.2.3-build' make: *** [bootstrap] Error 2 dclarke@vesta:~/build/first_pass/gcc/gcc-4.2.3-build$ This has happened repeatedly now .. twice actually. Not too sure what to do to get out of this little bind. Should I just set LD_LIBRARY_PATH=$HOME/local/lib ?? Any thoughts ? Dennis Clarke