[PATCH] clock_gettime fix for undefined HANDLE_REALTIME.

[Carlos O'Donell]

libc-alpha,

Testing the build with the __NR_clock_* syscalls missing, and hence
checking the fallbacks.

If HANDLED_REALTIME is not defined then sysdeps/unix/clock_gettime.c
will not compile, because HANDLE_REALTIME is undefined and the build
fails.

This happens when building on a system that does not have
__NR_clock_gettime exported as a syscall, or if their userspace headers
are not updated (same effect).

HANDLED_REALTIME is defined in sysdeps/unix/sysv/linux/clock_gettime.c
which includes the later clock_gettime.c at the end of that file.

A look at sysdeps/unix/sysv/linux/clock_settime.c hints that a
reasonable fallback could be gettimeofday().

Tested on hppa with no regressions, by inspection it should work
everwhere else.

Is it the intent to fail the build here?

Cheers,
Carlos.

2005-05-08  Carlos O'Donell <carlos@systemhalted.org>

	* sysdeps/unix/clock_gettime.c (HANDLE_REALTIME): Define.

Index: sysdeps/unix/clock_gettime.c
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/unix/clock_gettime.c,v
retrieving revision 1.10
diff -u -p -r1.10 clock_gettime.c
--- sysdeps/unix/clock_gettime.c	27 Apr 2005 08:01:40 -0000	1.10
+++ sysdeps/unix/clock_gettime.c	12 May 2005 21:07:10 -0000
@@ -96,6 +96,13 @@ clock_gettime (clockid_t clock_id, struc
 
   switch (clock_id)
     {
+#define HANDLE_REALTIME \
+      do {                          					      \
+	struct timeval tv;						      \
+	retval = gettimeofday (&tv, NULL);				      \
+	TIMEVAL_TO_TIMESPEC (&tv, tp);					      \
+      } while (0)
+      
 #ifdef SYSDEP_GETTIME
       SYSDEP_GETTIME;
 #endif