bk commit into 5.1 tree (msvensson:1.2517)

[msvensson]

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5.1 repository of msvensson. When msvensson does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet@stripped, 2007-06-07 09:50:53+02:00, msvensson@pilot.(none) +1 -0
  Merge pilot.(none):/data/msvensson/mysql/bug28690/my50-bug28690
  into  pilot.(none):/data/msvensson/mysql/bug28690/my51-bug28690
  MERGE: 1.1810.2939.29

  mysys/my_thr_init.c@stripped, 2007-06-07 09:50:51+02:00, msvensson@pilot.(none) +0 -5
    Merge 5.0->5.1
    MERGE: 1.31.1.14

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	msvensson
# Host:	pilot.(none)
# Root:	/data/msvensson/mysql/bug28690/my51-bug28690/RESYNC

--- 1.55/mysys/my_thr_init.c	2007-04-20 19:52:52 +02:00
+++ 1.56/mysys/my_thr_init.c	2007-06-07 09:50:51 +02:00
@@ -87,20 +87,21 @@ my_bool my_thread_global_init(void)
     fprintf(stderr,"Can't initialize threads: error %d\n", pth_ret);
     return 1;
   }
-  
+
 #ifdef NPTL_PTHREAD_EXIT_BUG
   /*
-    BUG#24507: Race conditions inside current NPTL pthread_exit() 
+    BUG#24507: Race conditions inside current NPTL pthread_exit()
     implementation.
 
     To avoid a possible segmentation fault during concurrent
     executions of pthread_exit(), a dummy thread is spawned which
     initializes internal variables of pthread lib. See bug description
     for a full explanation.
-  
+
     TODO: Remove this code when fixed versions of glibc6 are in common
     use.
   */
+  if (thd_lib_detected == THD_LIB_NPTL)
   {
     pthread_t       dummy_thread;
     pthread_attr_t  dummy_thread_attr;