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From: "howarth at nitro dot med.uc.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/54847] --enable-libstdcxx-time=yes doesn't find the functional nanosleep() on darwin
Date: Mon, 08 Oct 2012 15:31:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54847

--- Comment #32 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-08 15:31:30 UTC ---
Would something simple like...

Index: acinclude.m4
===================================================================
--- acinclude.m4    (revision 192212)
+++ acinclude.m4    (working copy)
@@ -1236,7 +1236,7 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME]
     [#include <unistd.h>
      #include <time.h>
     ],
-    [#if _POSIX_TIMERS > 0
+    [#if (_POSIX_TIMERS > 0 || defined(__APPLE__))
       timespec tp;
      #endif
       clock_gettime(CLOCK_REALTIME, &tp);

be acceptable? We have the options of __APPLE_CC__, __APPLE__ or __MACH__ from
the preprocessor defines emitted by FSF gcc trunk on darwin.