use a single libc and deduplicate threading code

Similar to musl libc a single libc has many benefits and solves
some open issues with uClibc-ng.

- no pthread_mutex_* weak symbols exported anymore
- applications no longer failing to link when either
  -lrt or -lpthread are missing for dynamic and static linking mode
- smaller C library
- slightly better runtime performance

2 files changed, 2 insertions, 177 deletions

diff --git a/libpthread/linuxthreads/sysdeps/pthread/bits/libc-lock.h b/libpthread/linuxthreads/sysdeps/pthread/bits/libc-lock.h
index a7c0249cf..c00d60bf0 100644
--- a/libpthread/linuxthreads/sysdeps/pthread/bits/libc-lock.h
+++ b/libpthread/linuxthreads/sysdeps/pthread/bits/libc-lock.h
@@ -105,13 +105,8 @@ typedef pthread_key_t __libc_key_t;
   (FUNC != NULL ? FUNC ARGS : ELSE)
 # endif
 #endif
-#if defined _LIBC && !defined NOT_IN_libc && defined SHARED
-# define __libc_maybe_call2(FUNC, ARGS, ELSE) \
-  ({__builtin_expect (__libc_pthread_functions.ptr_##FUNC != NULL, 0) \
-    ? __libc_pthread_functions.ptr_##FUNC ARGS : ELSE; })
-#else
-# define __libc_maybe_call2(FUNC, ARGS, ELSE) __libc_maybe_call (__##FUNC, ARGS, ELSE)
-#endif
+
+#define __libc_maybe_call2(FUNC, ARGS, ELSE) __libc_maybe_call (__##FUNC, ARGS, ELSE)
 
 /* Initialize the named lock variable, leaving it in a consistent, unlocked
    state.  */
@@ -351,63 +346,6 @@ extern int __pthread_atfork (void (*__prepare) (void),
 			     void (*__child) (void));
 
 
-
-/* Make the pthread functions weak so that we can elide them from
-   single-threaded processes.  */
-#ifndef __NO_WEAK_PTHREAD_ALIASES
-# ifdef weak_extern
-#   define BP_SYM(sym) sym
-weak_extern (BP_SYM (__pthread_mutex_init))
-weak_extern (BP_SYM (__pthread_mutex_destroy))
-weak_extern (BP_SYM (__pthread_mutex_lock))
-weak_extern (BP_SYM (__pthread_mutex_trylock))
-weak_extern (BP_SYM (__pthread_mutex_unlock))
-weak_extern (BP_SYM (__pthread_mutexattr_init))
-weak_extern (BP_SYM (__pthread_mutexattr_destroy))
-weak_extern (BP_SYM (__pthread_mutexattr_settype))
-weak_extern (BP_SYM (__pthread_rwlock_init))
-weak_extern (BP_SYM (__pthread_rwlock_destroy))
-weak_extern (BP_SYM (__pthread_rwlock_rdlock))
-weak_extern (BP_SYM (__pthread_rwlock_tryrdlock))
-weak_extern (BP_SYM (__pthread_rwlock_wrlock))
-weak_extern (BP_SYM (__pthread_rwlock_trywrlock))
-weak_extern (BP_SYM (__pthread_rwlock_unlock))
-weak_extern (BP_SYM (__pthread_key_create))
-weak_extern (BP_SYM (__pthread_setspecific))
-weak_extern (BP_SYM (__pthread_getspecific))
-weak_extern (BP_SYM (__pthread_once))
-weak_extern (__pthread_atfork)
-weak_extern (BP_SYM (_pthread_cleanup_push))
-weak_extern (BP_SYM (_pthread_cleanup_pop))
-weak_extern (BP_SYM (_pthread_cleanup_push_defer))
-weak_extern (BP_SYM (_pthread_cleanup_pop_restore))
-# else
-#  pragma weak __pthread_mutex_init
-#  pragma weak __pthread_mutex_destroy
-#  pragma weak __pthread_mutex_lock
-#  pragma weak __pthread_mutex_trylock
-#  pragma weak __pthread_mutex_unlock
-#  pragma weak __pthread_mutexattr_init
-#  pragma weak __pthread_mutexattr_destroy
-#  pragma weak __pthread_mutexattr_settype
-#  pragma weak __pthread_rwlock_destroy
-#  pragma weak __pthread_rwlock_rdlock
-#  pragma weak __pthread_rwlock_tryrdlock
-#  pragma weak __pthread_rwlock_wrlock
-#  pragma weak __pthread_rwlock_trywrlock
-#  pragma weak __pthread_rwlock_unlock
-#  pragma weak __pthread_key_create
-#  pragma weak __pthread_setspecific
-#  pragma weak __pthread_getspecific
-#  pragma weak __pthread_once
-#  pragma weak __pthread_atfork
-#  pragma weak _pthread_cleanup_push_defer
-#  pragma weak _pthread_cleanup_pop_restore
-#  pragma weak _pthread_cleanup_push
-#  pragma weak _pthread_cleanup_pop
-# endif
-#endif
-
 /* We need portable names for some functions.  E.g., when they are
    used as argument to __libc_cleanup_region_start.  */
 #define __libc_mutex_unlock __pthread_mutex_unlock
diff --git a/libpthread/linuxthreads/sysdeps/pthread/pthread-functions.h b/libpthread/linuxthreads/sysdeps/pthread/pthread-functions.h
deleted file mode 100644
index 119953df0..000000000
--- a/libpthread/linuxthreads/sysdeps/pthread/pthread-functions.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _PTHREAD_FUNCTIONS_H
-#define _PTHREAD_FUNCTIONS_H	1
-
-#include <pthread.h>
-#if 0
-#include <setjmp.h>
-#include <linuxthreads/internals.h>
-
-struct fork_block;
-#endif
-
-/* Data type shared with libc.  The libc uses it to pass on calls to
-   the thread functions.  Wine pokes directly into this structure,
-   so if possible avoid breaking it and append new hooks to the end.  */
-struct pthread_functions
-{
-#if 0
-  pid_t (*ptr_pthread_fork) (struct fork_block *);
-#endif
-  int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
-  int (*ptr_pthread_attr_init) (pthread_attr_t *);
-  int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
-  int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
-  int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
-  int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
-  int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *,
-					 struct sched_param *);
-  int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *,
-					 const struct sched_param *);
-  int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
-  int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
-  int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
-  int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
-  int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
-  int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
-  int (*ptr_pthread_cond_broadcast) (pthread_cond_t *);
-  int (*ptr_pthread_cond_destroy) (pthread_cond_t *);
-  int (*ptr_pthread_cond_init) (pthread_cond_t *,
-				  const pthread_condattr_t *);
-  int (*ptr_pthread_cond_signal) (pthread_cond_t *);
-  int (*ptr_pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
-  int (*ptr_pthread_equal) (pthread_t, pthread_t);
-  void (*ptr___pthread_exit) (void *);
-  int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
-  int (*ptr_pthread_setschedparam) (pthread_t, int,
-				    const struct sched_param *);
-  int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
-  int (*ptr_pthread_mutex_init) (pthread_mutex_t *,
-				 const pthread_mutexattr_t *);
-  int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
-  int (*ptr_pthread_mutex_trylock) (pthread_mutex_t *);
-  int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
-  pthread_t (*ptr_pthread_self) (void);
-  int (*ptr_pthread_setcancelstate) (int, int *);
-  int (*ptr_pthread_setcanceltype) (int, int *);
-#if 0
-  void (*ptr_pthread_do_exit) (void *retval, char *currentframe);
-  void (*ptr_pthread_cleanup_upto) (__jmp_buf target,
-				    char *targetframe);
-  pthread_descr (*ptr_pthread_thread_self) (void);
-#endif
-#if !defined __UCLIBC_HAS_TLS__ && defined __UCLIBC_HAS_RPC__
-  int (*ptr_pthread_internal_tsd_set) (int key, const void *pointer);
-  void * (*ptr_pthread_internal_tsd_get) (int key);
-  void ** __attribute__ ((__const__))
-    (*ptr_pthread_internal_tsd_address) (int key);
-#endif
-#if 0
-  int (*ptr_pthread_sigaction) (int sig, const struct sigaction * act,
-				struct sigaction *oact);
-  int (*ptr_pthread_sigwait) (const sigset_t *set, int *sig);
-  int (*ptr_pthread_raise) (int sig);
-#endif
-  int (*ptr_pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *,
-				       const struct timespec *);
-#if 0
-  void (*ptr__pthread_cleanup_push) (struct _pthread_cleanup_buffer * buffer,
-				     void (*routine)(void *), void * arg);
-#endif
-  void (*ptr__pthread_cleanup_push_defer) (struct _pthread_cleanup_buffer * buffer,
-					   void (*routine)(void *), void * arg);
-#if 0
-  void (*ptr__pthread_cleanup_pop) (struct _pthread_cleanup_buffer * buffer,
-				    int execute);
-#endif
-  void (*ptr__pthread_cleanup_pop_restore) (struct _pthread_cleanup_buffer * buffer,
-					    int execute);
-};
-
-/* Variable in libc.so.  */
-extern struct pthread_functions __libc_pthread_functions attribute_hidden;
-
-extern int * __libc_pthread_init (const struct pthread_functions *functions);
-
-#endif	/* pthread-functions.h */