On 2/19/2016 2:30 PM, Jonathan Wakely wrote: > On 19 February 2016 at 19:01, Nick Papior wrote: >> Am I missing some point here? >> I would have expected gcc/gfortran to use the _same_ preprocessing >> utility as that provided in cpp? > By default cpp works in C mode, but when invoked by the Fortran > front-end it runs in a different mode. If you use cpp -x f97-cpp-input > then it works in F95 mode, and you get results consistent with > invoking gcc on a .f file, or invoking gfortran. > > I don't know why cpp treats C and Fortran input differently, but > that's why you don't see what you expect. The most obvious reason is that C99/c++ style pre-processing will break the Fortran // operator (introduced in f77). It doesn't make sense if the previous -traditional option for gcc was changed to f97-cpp-input. Did you mean something like f77-cpp-input? -- Tim Prince
