http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59936
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Here is the message that i have received when writing the command "gcc > band-3c.for" You should either compile your file with gfortran, or pass the gfortran libraries: -lgfortran (may be also -lquadmath).