Bug #9954 mysql-4.1.11/cmd-line-utils/libedit/makelist.sh is not portable

 - Reverted removal of errorcheck mutex initialise, used in safe_mutex_init. 

include/my_pthread.h

@@ -612,6 +612,12 @@ extern pthread_mutexattr_t my_fast_mutexattr;
 #else
 #define MY_MUTEX_INIT_FAST   NULL
 #endif
+#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
+extern pthread_mutexattr_t my_errorcheck_mutexattr;
+#define MY_MUTEX_INIT_ERRCHK &my_errorcheck_mutexattr
+#else
+#define MY_MUTEX_INIT_ERRCHK   NULL
+#endif
 
 extern my_bool my_thread_global_init(void);
 extern void my_thread_global_end(void);

mysys/my_thr_init.c

@@ -40,6 +40,9 @@ pthread_mutex_t LOCK_gethostbyname_r;
 #ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
 pthread_mutexattr_t my_fast_mutexattr;
 #endif
+#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
+pthread_mutexattr_t my_errorcheck_mutexattr;
+#endif
 
 /*
   initialize thread environment
@@ -75,6 +78,14 @@ my_bool my_thread_global_init(void)
   pthread_mutexattr_settype(&my_fast_mutexattr,
                             PTHREAD_MUTEX_ADAPTIVE_NP);
 #endif
+#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
+  /*
+    Set mutex type to "errorcheck" a.k.a "adaptive"
+  */
+  pthread_mutexattr_init(&my_errorcheck_mutexattr);
+  pthread_mutexattr_settype(&my_errorcheck_mutexattr,
+                            PTHREAD_MUTEX_ERRORCHECK);
+#endif
 
   pthread_mutex_init(&THR_LOCK_malloc,MY_MUTEX_INIT_FAST);
   pthread_mutex_init(&THR_LOCK_open,MY_MUTEX_INIT_FAST);
@@ -107,6 +118,9 @@ void my_thread_global_end(void)
   pthread_key_delete(THR_KEY_mysys);
 #ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
   pthread_mutexattr_destroy(&my_fast_mutexattr);
+#endif
+#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
+  pthread_mutexattr_destroy(&my_errorcheck_mutexattr);
 #endif
   pthread_mutex_destroy(&THR_LOCK_malloc);
   pthread_mutex_destroy(&THR_LOCK_open);