Adding test for MPI_Offset. Also introducing an if statement to check for the size of MPI_Fint only when f77 is present. Else MPI_Fint is defined to be an int.

This commit was SVN r470.

configure.ac

@@ -98,7 +98,6 @@ AC_CANONICAL_HOST
 
 LAM_CONFIGURE_OPTIONS
 
-
 ############################################################################
 # Libtool: part one
 # (before C compiler setup)
@@ -222,16 +221,14 @@ LAM_SETUP_CXX
 LAM_SETUP_F77
 if test -n "$F77"; then
     LAM_F77_FIND_EXT_SYMBOL_CONVENTION($F77)
-fi
-
 	# checking the sizeof fortran interger. This is needed to define 
 	# MPI_Fint. This is needed for C bindings and hence there is no
 	# bearing of --enable-fortran flag on this test.
 	# 
 	LAM_SIZEOF_FORTRAN_INT=0
 	LAM_GET_SIZEOF_FORTRAN_TYPE(INTEGER, LAM_SIZEOF_FORTRAN_INT)
-#AC_DEFINE_UNQUOTED(LAM_SIZEOF_FORTRAN_INT, $LAM_SIZEOF_FORTRAN_INT,
-#    [Size of fortran INTEGER])
+fi
+
 LAM_SETUP_F90
 
 
@@ -296,7 +293,11 @@ lam_show_title "System-specific tests"
 # similary ac_cv_type_int64_t=yes. Similarly the values 
 # of ac_cv_sizeof_int will contain the size of int and later
 # this will be #defined to SIZEOF_INT.
+# NOTE:
+# This test should be carried out ONLY if there is a f77 compiler
+# available. Else we should default to MPI_Fint being an int.
 #
+if test -n "$F77"; then
 	MPI_FINT_TYPE="not found"
 	AC_MSG_CHECKING([checking for type of MPI_Fint])
 	if test "$LAM_SIZEOF_FORTRAN_INT" = 4 ; then
@@ -311,7 +312,7 @@ elif test "$LAM_SIZEOF_FORTRAN_INT" = 8 ; then
     	elif test "$ac_cv_type_long_long" = "yes" -a "$ac_cv_sizeof_long_long" = 8; then
         	MPI_FINT_TYPE="long long"
     	elif test "$ac_cv_sizeof_long" = 8; then
-        MPI_FINT_TYPE="long long"
+        	MPI_FINT_TYPE="long"
     	elif test "$ac_cv_sizeof_int" = 8 ; then
         	MPI_FINT_TYPE=int
     	fi
@@ -322,6 +323,43 @@ if test "$MPI_FINT_TYPE" = "not found"; then
     	AC_MSG_ERROR([Cannot continue])
 	fi
 	AC_DEFINE_UNQUOTED(MPI_Fint, $MPI_FINT_TYPE, [Type of MPI_Fint])
+else
+	AC_MSG_WARN([*** WARNING: Could not detect a f77 compiler. MPI_fint will be defined as an int]) 
+	MPI_FINT_TYPE=int
+	AC_DEFINE_UNQUOTED(MPI_Fint, $MPI_FINT_TYPE, [Type of MPI_Fint])
+fi
+
+#
+# Test to determine type of MPI_Offset. This is searched in the following order
+# int64_t, long long, long, int. If none of these are 8 bytes, then we should
+# search for int32_t, long long, long, int.
+#
+MPI_OFFSET_TYPE="not found"
+AC_MSG_CHECKING([checking for type of MPI_Offset])
+if test "$ac_cv_type_int64_t" == "yes"; then
+	MPI_OFFSET_TYPE=int64_t
+elif test "$ac_cv_type_long_long_t" == "yes" -a "$ac_cv_sizeof_long_long" = 8; then
+	MPI_OFFSET_TYPE="long long"
+elif test "$ac_cv_type_long_t" == "yes" -a "$ac_cv_sizeof_long" = 8; then
+	MPI_OFFSET_TYPE="long"
+elif test "ac_cv_sizeof_int" = 8; then
+	MPI_OFFSET_TYPE=int
+elif test "$ac_cv_type_int32_t" == "yes"; then
+	MPI_OFFSET_TYPE=int32_t
+elif test "$ac_cv_type_long_long_t" == "yes" -a "$ac_cv_sizeof_long_long" = 4; then
+	MPI_OFFSET_TYPE="long long"
+elif test "$ac_cv_type_long_t" == "yes" -a "$ac_cv_sizeof_long" = 4; then
+	MPI_OFFSET_TYPE="long"
+elif test "ac_cv_sizeof_int" = 4; then
+	MPI_OFFSET_TYPE=int
+fi
+AC_MSG_RESULT([$MPI_OFFSET_TYPE])
+if test "$MPI_FINT_TYPE" = "not found"; then
+	AC_MSG_WARN([*** WARNING: Unable to find the right definition for MPI_Offset])
+	AC_MSG_ERROR([Cannot continue])
+fi
+AC_DEFINE_UNQUOTED(MPI_Offset, $MPI_OFFSET_TYPE, [Type of MPI_Offset])
+
 
 
 # all: endian
@@ -515,11 +553,6 @@ AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_LIBS, "$WRAPPER_EXTRA_LIBS",
     [Additional LIBS to pass through the wrapper compilers])
 AC_MSG_RESULT([$WRAPPER_EXTRA_LIBS])
 
-#
-# Delayed the substitution of CFLAGS and CXXFLAGS until now because
-# they may have been modified throughout the course of this script.
-#
-
 AC_SUBST(CFLAGS)
 AC_SUBST(CPPFLAGS)
 AC_SUBST(CXXFLAGS)