Added MPI compiler macros from buildenv

aclocal_mpi.m4

@@ -370,3 +370,92 @@ dnl
         ifelse([$11],,:,[$11])
     fi
 ])
+
+AC_DEFUN([PAC_PROG_MPICC],[
+# Find the compilers, if they aren't set with the environment variables
+if test -z "$MPICC" ; then
+    AC_MSG_CHECKING([for MPI compile wrappers for C])
+    # First look for the wrappers
+    if test -n "$MPI_DIR" ; then
+        for w in mpicc bin/mpicc mpcc bin/mpcc ; do
+            if test -x $MPI_DIR/$w ; then
+	        MPICC=$MPI_DIR/$w
+                break
+            fi
+        done
+    fi
+    # Still not found
+    if test -z "$MPICC" ; then
+        # Try looking in the path
+        saveIFS=$IFS
+        IFS=":"
+	for dir in $PATH ; do
+	    for w in mpicc mpcc ; do
+	        if test -x $dir/$w ; then
+		    MPICC=$dir/$w
+		    break 2
+		fi
+            done
+	done
+	IFS=$saveIFS
+    fi
+    if test -n "$MPICC" ; then
+        AC_MSG_RESULT($MPICC)
+    else
+        AC_MSG_RESULT([none found])
+    fi
+fi
+AC_SUBST([MPICC])
+])
+
+AC_DEFUN([PAC_PROG_MPIFORT],[
+if test -z "$MPIFORT" ; then
+    AC_MSG_CHECKING([for MPI compile wrappers for Fortran])
+    if test -x $MPI_DIR/mpifort ; then
+        MPIFORT=$MPI_DIR/mpifort
+    elif test -x $MPI_DIR/bin/mpif90 ; then
+        MPIFORT=$MPI_DIR/bin/mpiff90
+    elif test -x $MPI_DIR/mpxlf ; then
+        MPIFORT=$MPIDIR/mpxlf
+    elif test -x $MPI_DIR/bin/mpxlf90 ; then
+        MPIFORT=$MPIDIR/bin/mpxlf90
+    else
+        saveIFS=$IFS
+        IFS=":"
+	for dir in $PATH ; do
+	    if test -x $dir/mpifort ; then
+                MPIFORT=$dir/mpifort
+		break
+            elif test -x $dir/mpif90 ; then
+                MPIFORT=$dir/mpif90
+		break
+            elif test -x $dir/mpxlf ; then
+                MPIFORT=$dir/mpxlf
+		break
+            fi
+	done
+	IFS=$saveIFS
+    fi
+    if test -n "$MPIFORT" ; then
+        AC_MSG_RESULT($MPIFORT)
+    else
+        AC_MSG_RESULT([none found])
+    fi
+fi
+AC_SUBST([MPIFORT])
+])
+
+## Add a check for whether the C compiler can handle MPI programs
+## as on the Cray.
+AC_DEFUN([PAC_MPI_CCWORKS],[
+  AC_SEARCH_LIBS(MPI_Init,$MPILIB mpi mpich)
+  if test "$ac_cv_search_MPI_Init" = "no" ; then
+    ifelse($2,,
+    AC_MSG_ERROR([Could not find MPI library]),[$2])
+  fi
+  AC_CHECK_HEADER(mpi.h,pac_have_mpi_h="yes",pac_have_mpi_h="no")
+  if test $pac_have_mpi_h = "no" ; then
+    ifelse($2,,
+    AC_MSG_ERROR([Could not find mpi.h include file]),[$2])
+  fi
+])