#undef TIOCSIGSEND /* defined in usg5-4.h */
+/* Tested on Irix 6.5. SCM worked on earlier versions. */
+#define GC_SETJMP_WORKS 1
+#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
+
/* arch-tag: d7ad9ec2-54ad-4b2f-adf2-0070c5c63e83
(do not change this comment) */