generate-dwarf-functions: add a 'Usage' comment

diff --git a/tools/generate-dwarf-functions b/tools/generate-dwarf-functions
index 38bd20e..fbb496a 100755 (executable)
--- a/tools/generate-dwarf-functions
+++ b/tools/generate-dwarf-functions
@@ -1,5 +1,6 @@
 #!/bin/sh
 # Generate files from a given dwarf.h
+# Usage: tools/generate-dwarf-functions /usr/include/dwarf.h
 
 cat - > src/mc/mc_dwarf_tagnames.cpp <<EOF
 /* Copyright (c) 2014. The SimGrid Team.