Re: AC_PROG_FC may not be first compiler check

[Steven G. Johnson]

On Sun, 3 Sep 2006, Ralf Wildenhues wrote:
> The first of the checks AC_PROG_{CC,F77,FC,...} also pulls in checks
> about default output and object file name/ending, and the like.  This
> is a problem with AC_PROG_FC: it may simply not work to compile
> conftest.f, because the compiler requires a `.f90' suffix.  Changing

Which compilers *require* a .f90 suffix?  My recollection was that all of 
the ones I tested allowed .f, although they might treat .f as Fortran 77.

Can you give an example where putting AC_PROG_FC first fails?

Cordially,
Steven G. Johnson