[Bug nptl/5780] OpenMP program linked with static libraries gets a runtime memory fault

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=5780

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2012-09-06 23:25:45 UTC ---
The issue is GCC uses

1. Mark pthread_foo as weak.
2. Use a weak pthread_xxxx to check if thread is active.
3. It does

if (pthread_xxxx)
  pthread_foo ();

With libpthread.a, there is no guarantee that linking in
archive member for pthread_xxxx will also include archive
member for pthread_foo.  When it happens, static executable
crashes when calling pthread_foo.  We can add

if (pthread_foo)
  pthread_foo ();

But it may lead to bad static executable hehavior.  The
list of pthread_foo is

pthread_attr_init
pthread_attr_setdetachstate
pthread_cond_broadcast
pthread_cond_destroy
pthread_cond_init
pthread_cond_signal
pthread_cond_wait
pthread_create
pthread_detach
pthread_exit
pthread_getschedparam
pthread_getspecific
pthread_join
pthread_key_create
pthread_key_delete
pthread_mutex_destroy
pthread_mutex_init
pthread_mutex_lock
pthread_mutex_trylock
pthread_mutex_unlock
pthread_once
pthread_self
pthread_setschedparam
pthread_setspecific
pthread_sigmask
__pthread_key_create

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