Slightly modified patch by Andreas Lauser. (requiring metis is an

error as it would have halted configure)

[[Imported from SVN: r6874]]

m4/parmetis.m4

@@ -78,7 +78,12 @@ AC_DEFUN([DUNE_PATH_PARMETIS],[
   
   ## do nothing if --without-parmetis is used
   if test x"$with_mpi" != x"no" && test x"$with_parmetis" != x"no" ; then
-          
+     
+      # call IMDX_LIB_METIS directly and not via AC_REQUIRE
+      # because AC_REQUIRE support not allow parameters
+      # without any parameters a missing METIS would halt configure
+      IMMDX_LIB_METIS(,[true])
+
       # defaultpath
       PARMETIS_LIB_PATH="$with_parmetis/$lib_path"
       PARMETIS_INCLUDE_PATH="$with_parmetis/$include_path"
@@ -87,11 +92,11 @@ AC_DEFUN([DUNE_PATH_PARMETIS],[
       PARMETIS_LDFLAGS="$DUNEMPILDFLAGS"
 
       # set variables so that tests can use them
-      CPPFLAGS="$CPPFLAGS -I$PARMETIS_INCLUDE_PATH $DUNEMPICPPFLAGS"
+      CPPFLAGS="$CPPFLAGS -I$PARMETIS_INCLUDE_PATH $METIS_INCLUDE $DUNEMPICPPFLAGS"
 
       # check for central header
       AC_CHECK_HEADER([parmetis.h],[
-	      PARMETIS_CPPFLAGS="-I$PARMETIS_INCLUDE_PATH"
+	      PARMETIS_CPPFLAGS="-I$PARMETIS_INCLUDE_PATH $METIS_INCLUDE"
 	      HAVE_PARMETIS="1"],[
 	      HAVE_PARMETIS="0"
 	      AC_MSG_WARN([parmetis.h not found in $PARMETIS_INCLUDE_PATH with $CPPFLAGS])]
@@ -108,7 +113,7 @@ AC_DEFUN([DUNE_PATH_PARMETIS],[
       if test x$HAVE_PARMETIS = x1 ; then
 	  DUNE_CHECK_LIB_EXT([$PARMETIS_LIB_PATH], [$with_metis_lib], [metis_partgraphkway],
               [
-		  PARMETIS_LIBS="-L$PARMETIS_LIB_PATH -l$with_metis_lib $DUNEMPILIBS -lm"
+		  PARMETIS_LIBS="-L$PARMETIS_LIB_PATH -l$with_metis_lib $METIS_LDFLAGS $DUNEMPILIBS -lm"
 		  LIBS="$PARMETIS_LIBS $ac_save_LIBS"
               ],[
 		  HAVE_PARMETIS="0"