Some changes to better support cross-compiling OMPI:

- fall back to compile test for windows paffinity component
    when cross compiling
  - fall back to platform guess when checking for threads having
    different pids with pthreads (yes on linux, no elsewhere)
  - pass the proper host, target, and build flags to the
    ROMIO configure script

With these changes, cross-compiling should be possible with the exception
of the Fortran 77 and Fortran 90 bindings.  Fortran 77 can be cross-
compiled if cache values are provided for type sizes and alignment.

This commit was SVN r8702.

config/ompi_check_pthread_pids.m4

@@ -1,5 +1,5 @@
 dnl
-dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
+dnl Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
 dnl                         University Research and Technology
 dnl                         Corporation.  All rights reserved.
 dnl Copyright (c) 2004-2005 The University of Tennessee and The University
@@ -62,7 +62,18 @@ void *checkpid(void *arg) {
      pthread_exit((void *) ret);
 }], 
 [MSG=no OMPI_THREADS_HAVE_DIFFERENT_PIDS=0], 
-[MSG=yes OMPI_THREADS_HAVE_DIFFERENT_PIDS=1])
+[MSG=yes OMPI_THREADS_HAVE_DIFFERENT_PIDS=1],
+[case $host in
+     *-linux*)
+         MSG="cross compiling - assuming yes"
+         OMPI_THREADS_HAVE_DIFFERENT_PIDS=1
+         ;;
+     *)
+         MSG="cross compiling - assuming no"
+         OMPI_THREADS_HAVE_DIFFERENT_PIDS=0
+         ;;
+ esac
+])
 
 CPPFLAGS="$CPPFLAGS_save"
 LDFLAGS="$LDFLAGS_save"

ompi/mca/io/romio/configure.m4

@@ -1,6 +1,6 @@
 # -*- shell-script -*-
 #
-# Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
+# Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
 #                         University Research and Technology
 #                         Corporation.  All rights reserved.
 # Copyright (c) 2004-2005 The University of Tennessee and The University
@@ -58,7 +58,13 @@ AC_DEFUN([MCA_io_romio_CONFIG],[
                    AS_IF([test -n "$prefix" -a "$prefix" != "NONE"], 
                          [io_romio_prefix_arg="--prefix=$prefix"], 
                          [io_romio_prefix_arg=])
-                   io_romio_flags="CFLAGS="'"'"$CFLAGS"'"'" CPPFLAGS="'"'"$CPPFLAGS"'"'" FFLAGS="'"'"$FFLAGS"'"'" LDFLAGS="'"'"$LSFLAGS"'"'" --$io_romio_shared-shared --$io_romio_static-static $io_romio_flags $io_romio_prefix_arg --with-mpi=open_mpi"
+
+                   io_romio_flags=
+                   AS_IF([test "$cross_compiling" = "yes"],
+                       [AS_IF([test ! -z $build], [io_romio_flags="$io_romio_flags --build=$build"])
+                        AS_IF([test ! -z $host], [io_romio_flags="$io_romio_flags --host=$host"])
+                        AS_IF([test ! -z $target], [io_romio_flags="$io_romio_flags --target=$target"])])
+                   io_romio_flags="$io_romio_flags CFLAGS="'"'"$CFLAGS"'"'" CPPFLAGS="'"'"$CPPFLAGS"'"'" FFLAGS="'"'"$FFLAGS"'"'" LDFLAGS="'"'"$LSFLAGS"'"'" --$io_romio_shared-shared --$io_romio_static-static $io_romio_flags $io_romio_prefix_arg --with-mpi=open_mpi"
 
                    ompi_show_subtitle "Configuring ROMIO distribution"
                    OMPI_CONFIG_SUBDIR([ompi/mca/io/romio/romio], 

opal/mca/paffinity/windows/configure.m4

@@ -1,6 +1,6 @@
 # -*- shell-script -*-
 #
-# Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
+# Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
 #                         University Research and Technology
 #                         Corporation.  All rights reserved.
 # Copyright (c) 2004-2005 The University of Tennessee and The University
@@ -25,12 +25,21 @@ AC_DEFUN([MCA_paffinity_windows_CONFIG],[
     # and then check for it's presence in the kernel32 library.
     AC_MSG_CHECKING(for working GetProcessAffinityMask)
     AC_TRY_RUN( [#include <windows.h>
-                 int main( int argc, char** argv ) {
-                    DWORD aff, mask;
-                    GetProcessAffinityMask( NULL, &aff, &mask );
-                    return 0; }],
-                    [AC_MSG_RESULT(yes)
-                     $1],
-                    [AC_MSG_RESULT(yes)
-                     $2])
+int main( int argc, char** argv ) {
+    DWORD aff, mask;
+    GetProcessAffinityMask( NULL, &aff, &mask );
+    return 0; }],
+        [AC_MSG_RESULT([yes])
+         $1],
+        [AC_MSG_RESULT([no])
+         $2],
+        [AC_COMPILE_IFELSE([#include <windows.h>
+int main( int argc, char** argv ) {
+    DWORD aff, mask;
+    GetProcessAffinityMask( NULL, &aff, &mask );
+    return 0; }],
+        [AC_MSG_RESULT([yes])
+         $1],
+        [AC_MSG_RESULT([no])
+         $2])])
 ])dnl