Add missing "extern"

diff --git a/lib/cgraph/cgraph.h b/lib/cgraph/cgraph.h
index 756da36b242ed8cdfd3532213d9cd697c43063f6..bed73fba13fea21eca8015b522396920b810b3a8 100644 (file)
--- a/lib/cgraph/cgraph.h
+++ b/lib/cgraph/cgraph.h
@@ -321,7 +321,7 @@ extern char *agstrbind(Agraph_t * g, char *);
 extern int agstrfree(Agraph_t *, char *);
 extern char *agcanon(char *, int);
 extern char *agstrcanon(char *, char *);
-char *agcanonStr(char *str);  /* manages its own buf */
+extern char *agcanonStr(char *str);  /* manages its own buf */
 
 /* definitions for dynamic string attributes */
 struct Agattr_s {              /* dynamic string attributes */