Need to add this line for sa_sigaction check in configure to work.
--- a/include/SDL_config.h.in Tue Jul 19 22:10:35 2011 -0700
+++ b/include/SDL_config.h.in Wed Jul 20 16:35:04 2011 -0700
@@ -131,6 +131,7 @@
#undef HAVE_VSNPRINTF
#undef HAVE_ICONV
#undef HAVE_SIGACTION
+#undef HAVE_SA_SIGACTION
#undef HAVE_SETJMP
#undef HAVE_NANOSLEEP
#undef HAVE_CLOCK_GETTIME