Hello,
I am currently annoyed by the gfortran/g77 incompatibilities. Indeed gfortran has still some regressions with regard with g77, especially some missing intrinsics. Some are listed in the g77 regressions meta-bug here: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19292 some are not listed (getarg, imag).
So there is still a need for g77 to build some code (for example the cernlib in fedora extras). Now the trouble is that code compiled with g77 and gfortran are not binary compatible. I have been told that compiling using g77 with -fno-f2c leads to compatibility with gfortran. Is it the case?
If it is the case, I think that all the libraries compiled with g77 in fedora extras (is there any fortran in fedora core?) should be compiled with -fno-f2c with the issue that all the code to be compiled against those libraries should also be compiled with -fno-f2c. Does this make sense?
-- Pat