call linker twice

git-svn-id: http://svn.osgeo.org/qgis/trunk@5739 c8812cc2-4d05-0410-92ff-de0c093fc19c

Makefile.win.rules.in

@@ -63,11 +63,16 @@ stdsubdirs:
         done
 
 # Rule for subdirs using standard win system (make -f Makefile.win)
+# Warning: for some strange reason the output DLL library after first
+#          linking is corrupted. We have to delete the library
+#          and to call linker again.
 winsubdirs:
 	@list='$(WINSUBDIRS)'; \
 	for subdir in $$list; do \
 	    echo $$subdir ; \
 	    $(MAKE) -C $$subdir -f Makefile.win || exit 1 ; \
+	    rm -f $$subdir/.libs/*.dll; \
+	    $(MAKE) -C $$subdir -f Makefile.win || exit 1 ; \
         done
 
 # Rule instalation (using WINSUBDIRS)