Add "-" to cpp arguments

Homebrews superenv cpp on OS X will not work without it

diff --git a/gtk2_ardour/wscript b/gtk2_ardour/wscript
index 3cf500f0407ccbc10869a8e51e44aab96b3a9555..b660a0e742400a2423759c85ae128a2ba34839c2 100644 (file)
--- a/gtk2_ardour/wscript
+++ b/gtk2_ardour/wscript
@@ -662,7 +662,7 @@ def build(bld):
     # Menus
     menus_argv = []
     if bld.is_defined('GTKOSX'):
-        menus_argv = [ '-E', '-P', '-DGTKOSX' ]
+        menus_argv = [ '-E', '-P', '-DGTKOSX', '-' ]
     else:
         menus_argv = [ '-E', '-P' ]