wine_pthread_init_thread: retrieve the stack info on Darwin.

configure.ac

diff --git a/configure.ac b/configure.ac
index 9e0a42f..2a2619e5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -548,10 +548,14 @@
 AC_CHECK_TYPES([pthread_rwlock_t, pthread_rwlockattr_t],,,[#define _GNU_SOURCE
 #include <pthread.h>])
 
-dnl **** Check for pthread_getattr_np ****
+dnl **** Check for pthread functions ****
 ac_save_LIBS="$LIBS"
 LIBS="$LIBS $LIBPTHREAD"
-AC_CHECK_FUNCS(pthread_getattr_np)
+AC_CHECK_FUNCS(\
+        pthread_getattr_np \
+        pthread_get_stackaddr_np \
+        pthread_get_stacksize_np \
+)
 LIBS="$ac_save_LIBS"
 
 dnl **** Check for Open Sound System ****