[glib] tests: introduce a small hack for visibility

[Ryan Lortie <ryanl src gnome org>]

commit 2c13657b0f1d9bd3bb2f6658adc6a410b13f355d
Author: Ryan Lortie <desrt desrt ca>
Date:   Mon Jan 14 00:13:00 2013 -0500

    tests: introduce a small hack for visibility
    
    One of our testcases builds a small giomodule for testing the loading of
    modules containing resources.  Unfortunately, this module gets built
    using the same CFLAGS as the rest of GLib, including the visibility
    flags (defaulting to hidden).
    
    Use "config.h" to get a declaration of _GLIB_EXTERN that will export
    symbols properly and use it to annotate the necessary APIs.

 gio/tests/resourceplugin.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gio/tests/resourceplugin.c b/gio/tests/resourceplugin.c
index b66d541..9e3b704 100644
--- a/gio/tests/resourceplugin.c
+++ b/gio/tests/resourceplugin.c
@@ -1,16 +1,18 @@
+#include "config.h"
+
 #include <gio/gio.h>
 
-void
+_GLIB_EXTERN void
 g_io_module_load (GIOModule *module)
 {
 }
 
-void
+_GLIB_EXTERN void
 g_io_module_unload (GIOModule   *module)
 {
 }
 
-char **
+_GLIB_EXTERN char **
 g_io_module_query (void)
 {
   return NULL;