[llvm-commits] [llvm] r171565 - /llvm/trunk/lib/Support/Unix/Process.inc

[Chandler Carruth]

Author: chandlerc
Date: Fri Jan  4 18:11:21 2013
New Revision: 171565

URL: http://llvm.org/viewvc/llvm-project?rev=171565&view=rev
Log:
Try to suppress the use of clock_gettime on Darwin which apparantly
defines _POSIX_CPUTIME but doesn't support the clock_* functions.

I don't test the value of _POSIX_CPUTIME because the spec merely says
that if it is defined, the CPU-specific timers are available, whereas it
says that _POSIX_TIMERS must be defined and defined to a value greater
than zero. However, this may not work, as the POSIX spec clearly states:

  "If the symbolic constant _POSIX_CPUTIME is defined, then the symbolic
  constant _POSIX_TIMERS shall also be defined by the implementation to
  have the value 200112L."

If this doesn't work, I'll add more hacks for Darwin.

Modified:
    llvm/trunk/lib/Support/Unix/Process.inc

Modified: llvm/trunk/lib/Support/Unix/Process.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Unix/Process.inc?rev=171565&r1=171564&r2=171565&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Unix/Process.inc (original)
+++ llvm/trunk/lib/Support/Unix/Process.inc Fri Jan  4 18:11:21 2013
@@ -69,7 +69,7 @@
 }
 
 TimeValue self_process::get_user_time() const {
-#ifdef _POSIX_CPUTIME
+#if _POSIX_TIMERS > 0 && defined(_POSIX_CPUTIME)
   // Try to get a high resolution CPU timer.
   struct timespec TS;
   if (::clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &TS) == 0)