http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60543
--- Comment #13 from Sarantis Pantazis <sarantis.pantazis at gmail dot com> --- > Did you update the compiler name in your makefile? I have left the line COMPILER=gfortran at the top as it is and I have defined an alias in my ~/.bashrc for gfortran pointing to the newly installed location (alias gfortran='$HOME/latestGcc/gcc-build/gcc/gfortran'). > cp MOD/generalfunctions.mod generalFunctions.mod.gz > gunzip generalFunctions.mod.gz I get "gzip: generalFunctions.mod.gz: not in gzip format". But anyway, the mod file is readable so I can skip to the third line. > grep PURE generalFunctions.mod UNKNOWN-INTENT MODULE-PROC DECL UNKNOWN 0 0 SUBROUTINE IMPLICIT_PURE) ( MODULE-PROC DECL UNKNOWN 0 0 FUNCTION IMPLICIT_PURE) (REAL 8 0 0 0 REAL So, I still get IMPLICIT_PURE. And when I run it I still get the infinite loop as well, so I guess I missed something during the installation?