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Re: AC_PROG_FC may not be first compiler check

From: Steven G. Johnson
Subject: Re: AC_PROG_FC may not be first compiler check
Date: Mon, 4 Sep 2006 14:40:48 -0400 (EDT)

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?

Steven G. Johnson

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