AC_INIT(ESPResSo, [2.9.0], address@hidden)

AC_ARG_WITH(mpi,,, [with_mpi=guess])
if test x"$with_mpi" != xno; then
  COMPILERS="mpicc hcc mpxlc_r mpxlc mpcc cmpicc gcc cc"
else
  COMPILERS="gcc cc"
fi
AC_PROG_CC($COMPILERS)

AS_IF([test x"$with_mpi" != xno], [
  # test whether MPI_Init is available now
  AC_CHECK_FUNC(MPI_Init,, [
      # if not, give up or use fake
      if test xyes = x"$with_mpi"; then
        AC_MSG_FAILURE([MPI compiler requested, but couldn't compile with MPI.])
      else
        AC_MSG_WARN([No MPI compiler found, will use fake implementation!])
        use_mpi_fake="yes"
      fi
  ])
])

# if requested, use the fake implementation
#AM_CONDITIONAL(MPI_FAKE, [test x$use_mpi_fake = xyes])