Fix compilation on cygwin after commit
762c9766c93697af8d7fbaa729aed118789dbe8e
"Use VERT_ATTRIB_* indexed array in gl_array_object" added the first non-driver
use of ffsll(), which exposes the fact that this isn't provided on cygwin.
Found by tinderbox, see [1]
[1] http://tinderbox.freedesktop.org/builds/2011-11-30-0017/logs/libGL/#build
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Brian Paul <brianp@vmware.com>
#ifdef __GNUC__
-#if defined(__MINGW32__) || defined(ANDROID)
+#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(ANDROID)
#define ffs __builtin_ffs
#define ffsll __builtin_ffsll
#endif