[cogl/msvc-support-1.8] cogl-debug.h: Force export of variables

[Chun-wei Fan <fanchunwei src gnome org>]

commit ef2b5cdaa3d2ab9b10754242e4011e5a1b569a8c
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Sep 23 17:28:35 2011 +0800

    cogl-debug.h: Force export of variables
    
    Mark the 2 variables as dllexport/dllimport for MSVC compilation as that
    is required to export the variables.

 cogl/cogl-debug.h |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/cogl/cogl-debug.h b/cogl/cogl-debug.h
index 3c8c73a..4fe20cd 100644
--- a/cogl/cogl-debug.h
+++ b/cogl/cogl-debug.h
@@ -31,6 +31,16 @@
 
 G_BEGIN_DECLS
 
+#ifdef _MSC_VER
+#ifdef COGL_BUILD_EXP
+#define COGL_EXP __declspec(dllexport)
+#else
+#define COGL_EXP __declspec(dllimport)
+#endif
+#else
+#define COGL_EXP 
+#endif
+
 typedef enum {
   COGL_DEBUG_SLICING,
   COGL_DEBUG_OFFSCREEN,
@@ -74,8 +84,8 @@ typedef enum {
 
 #define COGL_DEBUG_N_INTS COGL_FLAGS_N_INTS_FOR_SIZE (COGL_DEBUG_N_FLAGS)
 
-extern unsigned int _cogl_debug_flags[COGL_DEBUG_N_INTS];
-extern GHashTable *_cogl_debug_instances;
+COGL_EXP extern unsigned int _cogl_debug_flags[COGL_DEBUG_N_INTS];
+COGL_EXP extern GHashTable *_cogl_debug_instances;
 
 #define COGL_DEBUG_ENABLED(flag) \
   COGL_FLAGS_GET (_cogl_debug_flags, flag)