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diff --git a/mit-pthreads/machdep/engine-hppa-hpux-10.20.h b/mit-pthreads/machdep/engine-hppa-hpux-10.20.h
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+++ b/mit-pthreads/machdep/engine-hppa-hpux-10.20.h
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+/* ==== machdep.h ============================================================
+ * Copyright (c) 1993 Chris Provenzano, proven@athena.mit.edu
+ *
+ */
+
+#include <unistd.h>
+#include <setjmp.h>
+#include <sys/time.h>
+
+/*
+ * Stuff for compiling
+ */
+#if defined(__GNUC__)
+#if defined(__cplusplus)
+#define __BEGIN_DECLS extern "C" {
+#define __END_DECLS };
+#else
+#define __BEGIN_DECLS
+#define __END_DECLS
+#if !defined(__STDC__)
+#define const __const
+#define inline __inline
+#define signed __signed
+#define volatile __volatile
+#endif
+#endif
+#else /* !__GNUC__ */
+#define __BEGIN_DECLS
+#define __END_DECLS
+#if !defined(__STDC__)
+#define const
+#endif
+#define inline
+#define signed
+#define volatile
+#endif
+
+/*
+ * The first machine dependent functions are the SEMAPHORES
+ * needing the test and set instruction.
+ *
+ * Note: The set and clear defines are backwards.
+ */
+#define SEMAPHORE_CLEAR { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
+#define SEMAPHORE_SET 0
+
+#define SEMAPHORE_TEST_AND_SET(lock) \
+({ \
+long real_addr; \
+long temp; \
+ \
+real_addr = ((long)((*lock) + 15) & ~15); \
+ \
+__asm__ volatile("ldcwx %%r0(%2),%0" \
+ :"=r" (temp) \
+ :"0" (temp),"r" (real_addr)); \
+temp ? 0 : 1; \
+})
+
+#define SEMAPHORE_RESET(lock) \
+({ \
+char *real_addr; \
+ \
+real_addr = (char*)((long)((*lock) + 15) & ~15); \
+*real_addr = 0xff; \
+})
+
+/*
+ * New types
+ * The semaphore is really 16 bytes but must be aligened on a 16 byte
+ * boundary. By specifing 31 bytes the macros can frob it correctly.
+ */
+typedef char semaphore[31];
+
+/*
+ * Macros for sigset_t
+ */
+#define SIGMAX 30
+/* see hpux-9.03/__signal.h for SIG_ANY */
+
+/*
+ * New Strutures
+ */
+struct machdep_pthread {
+ void *(*start_routine)(void *);
+ void *start_argument;
+ void *machdep_stack;
+ struct itimerval machdep_timer;
+ jmp_buf machdep_state;
+ /* long machdep_state[_JBLEN]; */
+};
+
+/*
+ * Static machdep_pthread initialization values.
+ * For initial thread only.
+ */
+#define MACHDEP_PTHREAD_INIT \
+{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, 0 }
+
+/*
+ * Minimum stack size
+ */
+#define PTHREAD_STACK_MIN 4096
+
+/*
+ * Some fd flag defines that are necessary to distinguish between posix
+ * behavior and bsd4.3 behavior.
+ */
+#define __FD_NONBLOCK O_NONBLOCK
+
+/*
+ * page size
+ */
+#define getpagesize() 4096
+
+/*
+ * New functions
+ */
+
+__BEGIN_DECLS
+
+#if defined(PTHREAD_KERNEL)
+
+#define __machdep_stack_get(x) (x)->machdep_stack
+#define __machdep_stack_set(x, y) (x)->machdep_stack = y
+#define __machdep_stack_repl(x, y) \
+{ \
+ if (stack = __machdep_stack_get(x)) { \
+ __machdep_stack_free(stack); \
+ } \
+ __machdep_stack_set(x, y); \
+}
+
+void * __machdep_stack_alloc __P_((size_t));
+void __machdep_stack_free __P_((void *));
+
+int machdep_save_state __P_((void));
+
+#endif
+
+__END_DECLS