[Spice-devel] [protocol] macros: Use GLib's G_DEPRECATED macro if available

[Francois Gouget]

This gains us automatic support for whichever compilers GLib supports in
this macro when used in projects that use GLib.

Signed-off-by: Francois Gouget <fgouget at codeweavers.com>
---

This can make sense if we consider GLib to be a platform similar to gcc, 
MSVC: it just provides a G_XXX API instead of an __attribute((xxx)) or 
__declspec(xxx) one.

Also note that the same thing could be done with a number of other 
macros like SPICE_GNUC_WARN_UNUSED_RESULT, SPICE_GNUC_MAY_ALIAS, 
SPICE_GNUC_CONST, etc. Let me know if I should submit one patch for 
each, one for all or something else...

 spice/macros.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/spice/macros.h b/spice/macros.h
index a0413f3..42916b9 100644
--- a/spice/macros.h
+++ b/spice/macros.h
@@ -78,7 +78,9 @@
 #define SPICE_GNUC_NO_INSTRUMENT
 #endif  /* !__GNUC__ */
 
-#if    __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
+#ifdef G_DEPRECATED
+#define SPICE_GNUC_DEPRECATED  G_DEPRECATED
+#elif  __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
 #define SPICE_GNUC_DEPRECATED  __attribute__((__deprecated__))
 #else
 #define SPICE_GNUC_DEPRECATED
-- 
2.9.3