Improve on r23665. Ensure patches can be used on Solaris.

This commit was SVN r23701.

The following SVN revision numbers were found above:
  r23665 --> open-mpi/ompi@7acb18f3d4

autogen.sh

@@ -28,6 +28,14 @@
 unalias test sort cut xargs echo 2> /dev/null
 unset GREP_COLORS
 
+# Solaris patch is not compatible with Linux patch
+uname_s=`uname -s`
+if test "$uname_s" = "SunOS" ; then
+    patch="gpatch"
+else
+    patch="patch"
+fi
+
 ##############################################################################
 #
 # User-definable parameters (search path and minimum supported versions)
@@ -444,15 +452,21 @@ EOF
 	echo "** Adjusting libltdl for OMPI :-("
 
         echo "   ++ patching PGI -tp bug in ltmain.sh"
-        if test -z "`grep -w tp config/ltmain.sh`"; then
-            patch -N -p0 < config/ltmain_pgi_tp.diff
-        else
+        # Patch ltmain.sh error for PGI -tp flag.  Redirect stderr to
+        # /dev/null because this patch is only necessary for some versions of
+        # Libtool (e.g., 2.2.6b); it'll [rightfully] fail if you have a new
+        # enough Libtool that dosn't need this patch.  But don't alarm the
+        # user and make them think that autogen failed if this patch fails --
+        # make the errors be silent.
+        $patch -N -p0 < config/ltmain_pgi_tp.diff >/dev/null 2>&1
+        if test ! $? -eq 0 ; then
             echo "      -- your libtool doesn't need this! yay!"
         fi
+        rm -f config/ltmain.sh.rej
 
         echo "   ++ preopen error masking ib libltdl"
         if test -r opal/libltdl/loaders/preopen.c; then
-            patch -N -p0 < config/libltdl-preopen-error.diff
+            $patch -N -p0 < config/libltdl-preopen-error.diff
             rm -f opal/libltdl/loaders/preopen.c.rej
         fi
     else