Hi, I have a configure script that uses acx_mpi from the macro archive. It then wants to test some features of the MPI implementation such are whether mpi-io is supported, and I am trying to improve these tests to add them to the archive. So ACX_MPI sets MPICC or MPIFC or MPIF77 and MPILIBS , but then my subsequent tests want to use AC_LANG_CASE which falls back to CC or FC or F77 - is there a way to make AC_LANG_* recognize the MPI variants of the compilers? Other suggestions on how I might do this? Thanks, Jim _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf