Try to fix win build - may not be enough

diff --git a/src/xbt/config.c b/src/xbt/config.c
index 647ec57..1890645 100644 (file)
--- a/src/xbt/config.c
+++ b/src/xbt/config.c
@@ -940,7 +940,7 @@ static xbt_cfg_t make_set()
   return set;
 }                               /* end_of_make_set */
 
-extern xbt_cfg_t simgrid_config;
+XBT_PUBLIC_DATA(xbt_cfg_t) simgrid_config;
 
 XBT_TEST_UNIT("memuse", test_config_memuse, "Alloc and free a config set")
 {