Bug 1303212 - Don't check for CLOCK_MONOTONIC on darwin r=glandium

MozReview-Commit-ID: 9Ppn5jzcjbP

js/src/old-configure.in

@@ -1216,27 +1216,35 @@ AC_FUNC_MEMCMP
 AC_CHECK_FUNCS([getc_unlocked _getc_nolock gmtime_r localtime_r pthread_getname_np])
 
 dnl check for clock_gettime(), the CLOCK_MONOTONIC clock
-AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC),
-               ac_cv_clock_monotonic,
-               [for libs in "" -lrt; do
-                    _SAVE_LIBS="$LIBS"
-                    LIBS="$LIBS $libs"
-                    AC_TRY_LINK([#include <time.h>],
-                                 [ struct timespec ts;
-                                   clock_gettime(CLOCK_MONOTONIC, &ts); ],
-                                 ac_cv_clock_monotonic=$libs
-                                 LIBS="$_SAVE_LIBS"
-                                 break,
-                                 ac_cv_clock_monotonic=no)
-                    LIBS="$_SAVE_LIBS"
-                done])
-if test "$ac_cv_clock_monotonic" != "no"; then
-    HAVE_CLOCK_MONOTONIC=1
-    REALTIME_LIBS=$ac_cv_clock_monotonic
-    AC_DEFINE(HAVE_CLOCK_MONOTONIC)
-    AC_SUBST(HAVE_CLOCK_MONOTONIC)
-    AC_SUBST_LIST(REALTIME_LIBS)
-fi
+dnl avoid this on Darwin, since depending on your system config, we may think
+dnl it exists but it really doesn't
+case "$OS_TARGET" in
+Darwin)
+  ;;
+*)
+  AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC),
+                 ac_cv_clock_monotonic,
+                 [for libs in "" -lrt; do
+                      _SAVE_LIBS="$LIBS"
+                      LIBS="$LIBS $libs"
+                      AC_TRY_LINK([#include <time.h>],
+                                   [ struct timespec ts;
+                                     clock_gettime(CLOCK_MONOTONIC, &ts); ],
+                                   ac_cv_clock_monotonic=$libs
+                                   LIBS="$_SAVE_LIBS"
+                                   break,
+                                   ac_cv_clock_monotonic=no)
+                      LIBS="$_SAVE_LIBS"
+                  done])
+  if test "$ac_cv_clock_monotonic" != "no"; then
+      HAVE_CLOCK_MONOTONIC=1
+      REALTIME_LIBS=$ac_cv_clock_monotonic
+      AC_DEFINE(HAVE_CLOCK_MONOTONIC)
+      AC_SUBST(HAVE_CLOCK_MONOTONIC)
+      AC_SUBST_LIST(REALTIME_LIBS)
+  fi
+  ;;
+esac
 
 dnl Checks for math functions.
 dnl ========================================================

old-configure.in

@@ -1667,27 +1667,35 @@ AC_FUNC_MEMCMP
 AC_CHECK_FUNCS(stat64 lstat64 truncate64 statvfs64 statvfs statfs64 statfs getpagesize gmtime_r localtime_r arc4random arc4random_buf mallinfo gettid lchown setpriority strerror syscall)
 
 dnl check for clock_gettime(), the CLOCK_MONOTONIC clock
-AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC),
-               ac_cv_clock_monotonic,
-               [for libs in "" -lrt; do
-                    _SAVE_LIBS="$LIBS"
-                    LIBS="$LIBS $libs"
-                    AC_TRY_LINK([#include <time.h>],
-                                 [ struct timespec ts;
-                                   clock_gettime(CLOCK_MONOTONIC, &ts); ],
-                                 ac_cv_clock_monotonic=$libs
-                                 LIBS="$_SAVE_LIBS"
-                                 break,
-                                 ac_cv_clock_monotonic=no)
-                    LIBS="$_SAVE_LIBS"
-                done])
-if test "$ac_cv_clock_monotonic" != "no"; then
-    HAVE_CLOCK_MONOTONIC=1
-    REALTIME_LIBS=$ac_cv_clock_monotonic
-    AC_DEFINE(HAVE_CLOCK_MONOTONIC)
-    AC_SUBST(HAVE_CLOCK_MONOTONIC)
-    AC_SUBST_LIST(REALTIME_LIBS)
-fi
+dnl avoid this on Darwin, since depending on your system config, we may think
+dnl it exists but it really doesn't
+case "$OS_TARGET" in
+Darwin)
+  ;;
+*)
+  AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC),
+                 ac_cv_clock_monotonic,
+                 [for libs in "" -lrt; do
+                      _SAVE_LIBS="$LIBS"
+                      LIBS="$LIBS $libs"
+                      AC_TRY_LINK([#include <time.h>],
+                                   [ struct timespec ts;
+                                     clock_gettime(CLOCK_MONOTONIC, &ts); ],
+                                   ac_cv_clock_monotonic=$libs
+                                   LIBS="$_SAVE_LIBS"
+                                   break,
+                                   ac_cv_clock_monotonic=no)
+                      LIBS="$_SAVE_LIBS"
+                  done])
+  if test "$ac_cv_clock_monotonic" != "no"; then
+      HAVE_CLOCK_MONOTONIC=1
+      REALTIME_LIBS=$ac_cv_clock_monotonic
+      AC_DEFINE(HAVE_CLOCK_MONOTONIC)
+      AC_SUBST(HAVE_CLOCK_MONOTONIC)
+      AC_SUBST_LIST(REALTIME_LIBS)
+  fi
+  ;;
+esac
 
 AC_CACHE_CHECK(for pthread_cond_timedwait_monotonic_np,
                ac_cv_pthread_cond_timedwait_monotonic_np,