Hello; I have a large body of code which I compile with g77 (gcc 3). However, in gcc 4, g77 is now replaced by gfortran which is a F95 but not a F77 compiler. Is it possible to compile F77 code with gfortran such that the compiled code is equivalent to a g77 compilation? What are the compiler options? I looked at the manual of gfortran which states that sometime "in the future" variants of fortran other than F95 (such as F77) "may be supported" (section 10). Does that mean currently there is no F77 compiler in gcc4? Any help appreciated! Best regards Martin -- Martin W. Gruenewald e-mail: Martin.Grunewald@xxxxxxx http://cern.ch/Martin.Grunewald UCD School of Physics, University College Dublin, Belfield, Dublin 4, Ireland Phone: ++353 1 716 2210, 2217 Fax: ++353 1 283 7275 CERN PH-EP 32-2C08, CH-1211 Geneva 23, Switzerland Phone: ++41 22 76 70641