4 files changed, 114 insertions, 0 deletions
diff --git a/unix/configure b/unix/configure
index 2fcb86b..2151ef6 100755
--- a/unix/configure
+++ b/unix/configure
@@ -5091,6 +5091,111 @@ _ACEOF
 		fi
 	    fi
 	fi
+	if test $tcl_ok = no; then
+	    # Darwin thread stacksize API
+
+for ac_func in pthread_get_stacksize_np
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
+if eval "test \"\${$as_ac_var+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $ac_func innocuous_$ac_func
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $ac_func
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+char (*f) () = $ac_func;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != $ac_func;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+eval "$as_ac_var=no"
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+	fi
 	LIBS=$ac_saved_libs
     else
 	TCL_THREADS=0
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 6f67011..a0f1a6d 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -707,6 +707,10 @@ AC_DEFUN([SC_ENABLE_THREADS], [
 		fi
 	    fi
 	fi
+	if test $tcl_ok = no; then
+	    # Darwin thread stacksize API
+	    AC_CHECK_FUNCS(pthread_get_stacksize_np)
+	fi
 	LIBS=$ac_saved_libs
     else
 	TCL_THREADS=0
diff --git a/unix/tclConfig.h.in b/unix/tclConfig.h.in
index e08540e..6bfdb61 100644
--- a/unix/tclConfig.h.in
+++ b/unix/tclConfig.h.in
@@ -154,6 +154,9 @@
 /* Do we want a Linux-like thread-attribute interface? */
 #undef HAVE_PTHREAD_GETATTR_NP
 
+/* Define to 1 if you have the `pthread_get_stacksize_np' function. */
+#undef HAVE_PTHREAD_GET_STACKSIZE_NP
+
 /* Does putenv() copy strings or incorporate them by reference? */
 #undef HAVE_PUTENV_THAT_COPIES
 
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index 434cbed..57795ab 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -233,6 +233,8 @@ TclpThreadGetStackSize(void)
     }
     pthread_attr_destroy(&threadAttr);
     return (int) stackSize;
+#elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP)
+    return (int) pthread_get_stacksize_np(pthread_self());
 #else
     /*
      * Cannot determine the real stack size of this thread. The caller might