add glib/stdio compat wrapper for mingw64-w32

libs/pbd/pbd/gstdio_compat.h

@@ -0,0 +1,27 @@
+/* glib mingw64/win32 compatibility
+ *
+ * see http://pidgin.im/pipermail/devel/2014-April/023475.html
+ * and https://pidgin.im/pipermail/commits/2014-April/025031.html
+ * http://tracker.ardour.org/view.php?id=6575
+ */
+
+#ifndef __pbd_gstdio_compat_h__
+#define __pbd_gstdio_compat_h__
+
+#include <glib/gstdio.h>
+
+/* glib's definition of g_stat+GStatBuf is broken for mingw64-w32
+ * (and possibly other 32-bit windows)
+ */
+#if defined(_WIN32) && !defined(_MSC_VER) && !defined(_WIN64)
+typedef struct _stat GStatBufW32;
+static inline int
+pbd_g_stat(const gchar *filename, GStatBufW32 *buf)
+{
+	return g_stat(filename, (GStatBuf*)buf);
+}
+#  define GStatBuf GStatBufW32
+#  define g_stat pbd_g_stat
+#endif
+
+#endif /* __pbd_gstdio_compat_h__ */