Hi, after installing gcc-5-20150208 from source with /opt/gcc-5-20150208/configure --program-suffix=-5 --prefix=/usr/local --enable-languages=c,c++,fortran --disable-multilib I am not able to run the mpich ./configure script properly. Doing: CC=/usr/local/bin/gcc-5 FC=/usr/local/bin/gfortran-5 ./configure --enable-threads in the mpich-3.2a2 directory I got the error: configure: error: Unable to configure with Fortran support because configure could not determine the size of a Fortran INTEGER. Consider setting CROSS_F77_SIZEOF_INTEGER to the length in bytes of a Fortran INTEGER Is there any fix around ? Thank you, Jan -- Jan Wittke Geophysicist (M.Sc.) Institute of Geophysics and Meteorology University of Cologne Email: [email protected] Homepage: www.geomet.uni-koeln.de Tel.: +49 (0)221 470 6132 / Room 310 _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss