Clean pthread functions namespaces for C11 threads

This patch adds internal definition (through {libc_}hidden_{proto,def}) and
also change some strong to weak alias for symbols that might be used by C11
threads implementations.

The patchset should not change libc/libpthread functional, although object
changes are expected (since now internal symbols are used instead) and final
exported symbols through GLIBC_PRIVATE is also expanded (to cover libpthread
usage of __mmap{64}, __munmap, __mprotect).

Checked with a build for all major ABI (aarch64-linux-gnu, alpha-linux-gnu,
arm-linux-gnueabi, i386-linux-gnu, ia64-linux-gnu, m68k-linux-gnu,
microblaze-linux-gnu [1], mips{64}-linux-gnu, nios2-linux-gnu,
powerpc{64le}-linux-gnu, s390{x}-linux-gnu, sparc{64}-linux-gnu,
tile{pro,gx}-linux-gnu, and x86_64-linux-gnu).

	* include/sched.h (__sched_get_priority_max): Add libc hidden proto.
	(__sched_get_prioriry_min): Likewise.
	* include/sys/mman.h (__mmap): Likewise.
	(__mmap64): Likewise.
	(__munmap): Likewise.
	(__mprotect): Likewise.
	* include/termios.h (__tcsetattr): Likewise.
	* include/time.h (__nanosleep): Use hidden_proto instead of
	libc_hidden_proto.
	* posix/nanosleep.c (__nanosleep): Likewise.
	* misc/Versions (libc): Export __mmap, __munmap, __mprotect,
	__sched_get_priority_min, and __sched_get_priority_max under
	GLIBC_PRIVATE.
	* nptl/allocatestack.c (__free_stacks): Use internal definition for
	libc symbols.
	(change_stack_perm): Likewise.
	(allocate_stack): Likewise.
	* sysdeps/posix/gethostname.c: Likewise.
	* nptl/tpp.c (__init_sched_fifo_prio): Likewise.
	* sysdeps/unix/sysv/linux/i386/smp.h (is_smp_system): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/ioctl.c (__ioctl): Likewise.
	* nptl/pthreadP.h (__pthread_mutex_timedlock): Add definition.
	(__pthread_key_delete): Likewise.
	(__pthread_detach): Likewise.
	(__pthread_cancel): Likewise.
	(__pthread_mutex_trylock): Likewise.
	(__pthread_mutexattr_init): Likewise.
	(__pthread_mutexattr_settype): Likewise.
	* nptl/pthread_cancel.c (pthread_cancel): Change to internal name and
	create alias for exported one.
	* nptl/pthread_join.c (pthread_join): Likewise.
	* nptl/pthread_detach.c (pthread_detach): Likewise.
	* nptl/pthread_key_delete.c (pthread_key_delete): Likewise.
	* nptl/pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise.
	* nptl/pthread_create.c: Change static requirements for pthread
	symbols.
	* nptl/pthread_equal.c (__pthread_equal): Change strong alias to weak
	for internal definition.
	* nptl/pthread_exit.c (__pthread_exit): Likewise.
	* nptl/pthread_getspecific.c (__pthread_getspecific): Likewise.
	* nptl/pthread_key_create.c (__pthread_key_create): Likewise.
	* nptl/pthread_mutex_destroy.c (__pthread_mutex_destroy): Likewise.
	* nptl/pthread_mutex_init.c (__pthread_mutex_init): Likewise.
	* nptl/pthread_mutex_lock.c (__pthread_mutex_lock): Likewise.
	* nptl/pthread_mutex_trylock.c (__pthread_mutex_trylock): Likewise.
	* nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock): Likewise.
	* nptl/pthread_mutexattr_init.c (__pthread_mutexattr_init): Likwise.
	* nptl/pthread_mutexattr_settype.c (__pthread_mutexattr_settype):
	Likewise.
	* nptl/pthread_self.c (__pthread_self): Likewise.
	* nptl/pthread_setspecific.c (__pthread_setspecific): Likewise.
	* sysdeps/unix/sysv/linux/tcsetattr.c (tcsetattr): Likewise.
	* misc/mmap.c (__mmap): Add internal symbol definition.
	* misc/mmap.c (__mmap64): Likewise.
	* sysdeps/unix/sysv/linux/mmap.c (__mmap): Likewise.
	* sysdeps/unix/sysv/linux/mmap64.c (__mmap): Likewise.
	(__mmap64): Likewise.
	* sysdeps/unix/sysv/linux/i386/Versions (libc) [GLIBC_PRIVATE):
	Add __uname.

8 files changed, 12 insertions, 8 deletions

diff --git a/sysdeps/posix/gethostname.c b/sysdeps/posix/gethostname.c
index 03a5d3f..a132482 100644
--- a/sysdeps/posix/gethostname.c
+++ b/sysdeps/posix/gethostname.c
@@ -29,7 +29,7 @@ __gethostname (char *name, size_t len)
   struct utsname buf;
   size_t node_len;
 
-  if (uname (&buf))
+  if (__uname (&buf))
     return -1;
 
   node_len = strlen (buf.nodename) + 1;
diff --git a/sysdeps/unix/sysv/linux/i386/Versions b/sysdeps/unix/sysv/linux/i386/Versions
index f3544ac..b59ace4 100644
--- a/sysdeps/unix/sysv/linux/i386/Versions
+++ b/sysdeps/unix/sysv/linux/i386/Versions
@@ -46,6 +46,6 @@ libc {
     fallocate64;
   }
   GLIBC_PRIVATE {
-    __modify_ldt;
+    __modify_ldt; __uname;
   }
 }
diff --git a/sysdeps/unix/sysv/linux/i386/smp.h b/sysdeps/unix/sysv/linux/i386/smp.h
index 7d1a7f2..3109ea9 100644
--- a/sysdeps/unix/sysv/linux/i386/smp.h
+++ b/sysdeps/unix/sysv/linux/i386/smp.h
@@ -36,7 +36,7 @@ is_smp_system (void)
   char *cp;
 
   /* Try reading the number using `sysctl' first.  */
-  if (uname (&u.uts) == 0)
+  if (__uname (&u.uts) == 0)
     cp = u.uts.version;
   else
     {
diff --git a/sysdeps/unix/sysv/linux/mmap.c b/sysdeps/unix/sysv/linux/mmap.c
index b1f229f..98c2f88 100644
--- a/sysdeps/unix/sysv/linux/mmap.c
+++ b/sysdeps/unix/sysv/linux/mmap.c
@@ -47,5 +47,6 @@ __mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
 #endif
 }
 weak_alias (__mmap, mmap)
+libc_hidden_def (__mmap)
 
 #endif /* __OFF_T_MATCHES_OFF64_T  */
diff --git a/sysdeps/unix/sysv/linux/mmap64.c b/sysdeps/unix/sysv/linux/mmap64.c
index d3ea279..e8d519b 100644
--- a/sysdeps/unix/sysv/linux/mmap64.c
+++ b/sysdeps/unix/sysv/linux/mmap64.c
@@ -53,8 +53,10 @@ __mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset)
 #endif
 }
 weak_alias (__mmap64, mmap64)
+libc_hidden_def (__mmap64)
 
 #ifdef __OFF_T_MATCHES_OFF64_T
 weak_alias (__mmap64, mmap)
 weak_alias (__mmap64, __mmap)
+libc_hidden_def (__mmap)
 #endif
diff --git a/sysdeps/unix/sysv/linux/nanosleep.c b/sysdeps/unix/sysv/linux/nanosleep.c
index b352f84..2d15328 100644
--- a/sysdeps/unix/sysv/linux/nanosleep.c
+++ b/sysdeps/unix/sysv/linux/nanosleep.c
@@ -26,5 +26,5 @@ __nanosleep (const struct timespec *requested_time,
 {
   return SYSCALL_CANCEL (nanosleep, requested_time, remaining);
 }
-libc_hidden_def (__nanosleep)
+hidden_def (__nanosleep)
 weak_alias (__nanosleep, nanosleep)
diff --git a/sysdeps/unix/sysv/linux/powerpc/ioctl.c b/sysdeps/unix/sysv/linux/powerpc/ioctl.c
index e2e3d33..1437d1d 100644
--- a/sysdeps/unix/sysv/linux/powerpc/ioctl.c
+++ b/sysdeps/unix/sysv/linux/powerpc/ioctl.c
@@ -41,15 +41,15 @@ __ioctl (int fd, unsigned long int request, ...)
       break;
 
     case TCSETS:
-      result = tcsetattr (fd, TCSANOW, (struct termios *) arg);
+      result = __tcsetattr (fd, TCSANOW, (struct termios *) arg);
       break;
 
     case TCSETSW:
-      result = tcsetattr (fd, TCSADRAIN, (struct termios *) arg);
+      result = __tcsetattr (fd, TCSADRAIN, (struct termios *) arg);
       break;
 
     case TCSETSF:
-      result = tcsetattr (fd, TCSAFLUSH, (struct termios *) arg);
+      result = __tcsetattr (fd, TCSAFLUSH, (struct termios *) arg);
       break;
 
     default:
diff --git a/sysdeps/unix/sysv/linux/tcsetattr.c b/sysdeps/unix/sysv/linux/tcsetattr.c
index c7d1d65..49acd16 100644
--- a/sysdeps/unix/sysv/linux/tcsetattr.c
+++ b/sysdeps/unix/sysv/linux/tcsetattr.c
@@ -41,7 +41,7 @@
 
 /* Set the state of FD to *TERMIOS_P.  */
 int
-tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
+__tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
 {
   struct __kernel_termios k_termios;
   unsigned long int cmd;
@@ -77,4 +77,5 @@ tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
 
   return INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios);
 }
+weak_alias (__tcsetattr, tcsetattr)
 libc_hidden_def (tcsetattr)