[glib] Bug 652827: Update config.h.win32.in

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

commit 77a10feafa4f77f1fcadb2ed1fd5da41dced3553
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Aug 11 15:30:48 2011 +0800

    Bug 652827: Update config.h.win32.in
    
    Add check macro for HAVE_WIN32_BUILTINS_FOR_ATOMIC_OPERATIONS, as it is
    now required for MSVC builds of glib/gatomic.c GLib 2.29.15+.
    
    It is true that the MinGW cross-compiler on Linux systems will have
    HAVE_GCC_BUILTINS_FOR_ATOMIC_OPERATIONS and
    HAVE_WIN32_BUILTINS_FOR_ATOMIC_OPERATIONS defined during the completion
    of ./configure, but since this file is primarily meant for people
    compiling -on- Windows (and that the "native" Windows MinGW would neither
    ./configure to define HAVE_GCC_BUILTINS_FOR_ATOMIC_OPERATIONS and
    HAVE_WIN32_BUILTINS_FOR_ATOMIC_OPERATIONS), this file will be updated as
    it is for now at least until the situation for "native" Windows MinGW
    change. (please see Bug 652827 regarding this paragraph)

 config.h.win32.in |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/config.h.win32.in b/config.h.win32.in
index 01718e3..d51d3d6 100644
--- a/config.h.win32.in
+++ b/config.h.win32.in
@@ -93,6 +93,14 @@
 /* x86_64 atomic implementation */
 /* #undef G_ATOMIC_X86_64 */
 
+/* whether GCC supports built-in atomic intrinsics */
+/* #undef HAVE_GCC_BUILTINS_FOR_ATOMIC_OPERATIONS */
+
+/* Have Win32 atomic intrinsics */
+#ifdef _MSC_VER
+#define HAVE_WIN32_BUILTINS_FOR_ATOMIC_OPERATIONS 1
+#endif
+
 /* Have inline keyword */
 #ifndef _MSC_VER
 #define G_HAVE_INLINE 1