Added SGI errno changes.

configure.in

@@ -1034,6 +1034,7 @@ if test $ol_link_threads != no ; then
 	AC_DEFINE(_THREAD_SAFE,1)
 	AC_DEFINE(THREADSAFE,1)
 	AC_DEFINE(_THREADSAFE,1)
+        AC_DEFINE(_SGI_MP_SOURCE,1)
 
 	dnl this might cause the errno symbol to be
 	dnl replaced with a function to get a thread specific errno.

include/portable.h.in

@@ -108,6 +108,10 @@
 #ifndef _THREAD_SAFE
 #undef _THREAD_SAFE
 #endif
+#ifndef _SGI_MP_SOURCE
+#undef _SGI_MP_SOURCE
+#endif
+
 
 /* define this if toupper() requires tolower() check */
 #undef C_UPPER_LOWER