sysconf on Linux/ia64 reported outdate versions for some options

The code is also cleaned up to avoid inefficiencies.

ChangeLog

@@ -1,5 +1,12 @@
 2011-05-15  Ulrich Drepper  <drepper@gmail.com>
 
+	[BZ #10157]
+	* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Split out CPUTIME
+	tests into ...
+	(has_cpuclock): ...this.  New function.
+	* sysdeps/unix/sysv/linux/ia64/sysconf.c: Just define HAS_CPUCLOCK
+	macro here based on has_cpuclock code.
+
 	[BZ #10149]
 	* sysdeps/unix/sysv/linux/dl-osinfo.h (_dl_setup_stack_chk_guard):
 	First byte (not low byte) is now always NUL.

NEWS

@@ -9,13 +9,13 @@ Version 2.14
 
 * The following bugs are resolved with this release:
 
-  386, 9809, 10149, 11257, 11258, 11487, 11532, 11578, 11653, 11668, 11724,
+  386, 9809, 10149, 10157, 11257, 11258, 11487, 11532, 11578, 11653, 11668,
-  11901, 11945, 11947, 11952, 12052, 12083, 12158, 12178, 12200, 12346,
+  11724, 11901, 11945, 11947, 11952, 12052, 12083, 12158, 12178, 12200,
-  12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
+  12346, 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469,
-  12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
+  12489, 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582,
-  12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
+  12583, 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653,
-  12660, 12681, 12685, 12711, 12713, 12714, 12717, 12723, 12724, 12734,
+  12655, 12660, 12681, 12685, 12711, 12713, 12714, 12717, 12723, 12724,
-  12738
+  12734, 12738
 
 * The RPC implementation in libc is obsoleted.  Old programs keep working
   but new programs cannot be linked with the routines in libc anymore.

sysdeps/unix/sysv/linux/ia64/sysconf.c

@@ -1,5 +1,5 @@
-/* Get file-specific information about a file.  Linux version.
+/* Get file-specific information about a file.  Linux/ia64 version.
-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -24,22 +24,8 @@
 
 
 #include "has_cpuclock.c"
+#define HAS_CPUCLOCK() (has_cpuclock () ? _POSIX_VERSION : -1)
 
-static long int linux_sysconf (int name);
-
-
-/* Get the value of the system variable NAME.  */
-long int
-__sysconf (int name)
-{
-  if (name == _SC_CPUTIME || name == _SC_THREAD_CPUTIME)
-    return has_cpuclock () ? 200112L : -1;
-
-  /* Everything else is handled by the more general code.  */
-  return linux_sysconf (name);
-}
 
 /* Now the generic Linux version.  */
-#undef __sysconf
-#define __sysconf static linux_sysconf
 #include "../sysconf.c"

sysdeps/unix/sysv/linux/sysconf.c

@@ -1,5 +1,5 @@
 /* Get file-specific information about a file.  Linux version.
-   Copyright (C) 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2003,2004,2006 2008,2009,2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -35,6 +35,34 @@
 static long int posix_sysconf (int name);
 
 
+#ifndef HAS_CPUCLOCK
+static long int
+has_cpuclock (void)
+{
+# if defined __NR_clock_getres || HP_TIMING_AVAIL
+  /* If we have HP_TIMING, we will fall back on that if the system
+     call does not work, so we support it either way.  */
+#  if !HP_TIMING_AVAIL
+  /* Check using the clock_getres system call.  */
+  struct timespec ts;
+  INTERNAL_SYSCALL_DECL (err);
+  int r = INTERNAL_SYSCALL (clock_getres, err, 2,
+			    (name == _SC_CPUTIME
+			     ? CLOCK_PROCESS_CPUTIME_ID
+			     : CLOCK_THREAD_CPUTIME_ID),
+			    &ts);
+  if (INTERNAL_SYSCALL_ERROR_P (r, err))
+    return -1;
+#  endif
+  return _POSIX_VERSION;
+# else
+  return -1;
+# endif
+}
+# define HAS_CPUCLOCK() has_cpuclock ()
+#endif
+
+
 /* Get the value of the system variable NAME.  */
 long int
 __sysconf (int name)
@@ -56,27 +84,9 @@ __sysconf (int name)
       }
 #endif
 
-#if defined __NR_clock_getres || HP_TIMING_AVAIL
     case _SC_CPUTIME:
     case _SC_THREAD_CPUTIME:
-      {
+      return HAS_CPUCLOCK ();
-	/* If we have HP_TIMING, we will fall back on that if the system
-	   call does not work, so we support it either way.  */
-# if !HP_TIMING_AVAIL
-	/* Check using the clock_getres system call.  */
-	struct timespec ts;
-	INTERNAL_SYSCALL_DECL (err);
-	int r = INTERNAL_SYSCALL (clock_getres, err, 2,
-				  (name == _SC_CPUTIME
-				   ? CLOCK_PROCESS_CPUTIME_ID
-				   : CLOCK_THREAD_CPUTIME_ID),
-				  &ts);
-	if (INTERNAL_SYSCALL_ERROR_P (r, err))
-	  return -1;
-# endif
-	return _POSIX_VERSION;
-      }
-#endif
 
     case _SC_ARG_MAX:
 #if __LINUX_KERNEL_VERSION < 0x020617