update the double extern declaration bis

[simgrid.git] / src / surf / surfxml_parse.c

diff --git a/src/surf/surfxml_parse.c b/src/surf/surfxml_parse.c
index 785a41d..c8d2f0c 100644 (file)
--- a/src/surf/surfxml_parse.c
+++ b/src/surf/surfxml_parse.c
@@ -168,8 +168,12 @@ void ETag_surfxml_argument(void)
 }
 
 void  surf_parse_open(const char *file) {
+  static int warned = 0; /* warn only once */
   if(!file) {
-    WARN0("I hope you know what you're doing... you just gave me a NULL pointer!");
+    if (!warned) {
+      WARN0("Bypassing the XML parser since surf_parse_open received a NULL pointer. If it is not what you want, go fix your code.");
+      warned = 1;
+    }
     return;
   }
   if(!surf_input_buffer_stack)