http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50238
--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-08-30 17:08:14 UTC --- (In reply to comment #3) > ./configure --prefix=/usr/local --with-mpfr=/usr/local --with-gmp=/usr/local I want to add to the comments of Jakub that building GCC in-tree is not supported. That is: ./configure is wrong. You should create a separate directory, go to this directory and invoke "configure" from there. For instance: cd .. mkdir gcc-build cd gcc-build ../gcc-4.3.4/configure ... > MATLAB supports only up to this release. Interesting to know. Hopefully, the start supporting newer versions soon, given that the currently supported releases are 4.4, 4.5 and 4.6 (4.7 is currently developed). Thus, 4.3 is no longer supported and 4.4 will likely become unsupported in half a year. (As written, you could also try the existing unofficial builds at http://gcc.gnu.org/wiki/GFortranBinaries ; for x86-64 Linux there are 4.3 snapshots available.)