cleanup fork()

Keep only fork (and it's hidden variant) and __libc_fork.
Common __libc_fork prototype in unistd.h.
Get rid of __fork, by changing HIDDEN_JUMPTARGET(__fork) to use fork
I can't see the reason to have fork() in libpthread, but kept it for now
making __fork static in these files.

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/unistd.h

@@ -768,7 +768,10 @@ libc_hidden_proto(setresgid)
    Return -1 for errors, 0 to the new process,
    and the process ID of the new process to the old process.  */
 extern __pid_t fork (void) __THROW;
+# ifdef _LIBC
+extern __typeof(fork) __libc_fork;
 libc_hidden_proto(fork)
+# endif
 #endif
 
 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED

libc/sysdeps/linux/common/fork.c

@@ -14,7 +14,6 @@
 
 #ifdef __NR_fork
 #define __NR___libc_fork __NR_fork
-extern __typeof(fork) __libc_fork;
 _syscall0(pid_t, __libc_fork)
 weak_alias(__libc_fork,fork)
 libc_hidden_weak(fork)

libc/sysdeps/linux/ia64/fork.S

@@ -36,7 +36,5 @@ ENTRY(__libc_fork)
 	ret
 PSEUDO_END(__libc_fork)
 
-weak_alias (__libc_fork, __fork)
-libc_hidden_def (__fork)
 weak_alias (__libc_fork, fork)
 libc_hidden_weak (fork)

libc/sysdeps/linux/xtensa/fork.c

@@ -14,9 +14,6 @@
 
 /* Xtensa doesn't provide a 'fork' system call, so we use 'clone'.  */
 
-extern __typeof(fork) __libc_fork;
-
-libc_hidden_proto(fork)
 pid_t __libc_fork(void)
 {
 	return (pid_t) INLINE_SYSCALL(clone, 2, SIGCHLD, 0);

libpthread/linuxthreads.old/ptfork.c

@@ -93,10 +93,7 @@ void __pthread_once_fork_prepare(void);
 void __pthread_once_fork_child(void);
 void __pthread_once_fork_parent(void);
 
-extern __typeof(fork) __libc_fork;
-
-pid_t __fork(void) attribute_hidden;
-pid_t __fork(void)
+static pid_t __fork(void)
 {
   pid_t pid;
   struct handler_list * prepare, * child, * parent;

libpthread/linuxthreads/ptfork.c

@@ -23,8 +23,6 @@
 #include <bits/libc-lock.h>
 #include "fork.h"
 
-extern int __libc_fork (void);
-
 pid_t __pthread_fork (struct fork_block *b)
 {
   pid_t pid;

libpthread/linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S

@@ -30,7 +30,7 @@ __vfork:
 
 #ifdef SHARED
 	ldq	t0, __libc_pthread_functions(gp) !gprel
-	bne	t0, HIDDEN_JUMPTARGET (__fork) !samegp
+	bne	t0, HIDDEN_JUMPTARGET (fork) !samegp
 #else
 	.weak	pthread_create
 	ldq	t0, pthread_create(gp) !literal
@@ -50,7 +50,7 @@ $do_fork:
 	cfi_adjust_cfa_offset(16)
 	stq	ra, 0(sp)
 	cfi_offset(ra, -16)
-	jsr	ra, HIDDEN_JUMPTARGET (__fork)
+	jsr	ra, HIDDEN_JUMPTARGET (fork)
 	ldgp	gp, 0(ra)
 	ldq	ra, 0(sp)
 	addq	sp, 16, sp

libpthread/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S

@@ -40,7 +40,7 @@ ENTRY (__vfork)
 	ldr	r0, 1f
 #endif
 	movs	r0, r0
-	bne	HIDDEN_JUMPTARGET (__fork)
+	bne	HIDDEN_JUMPTARGET (fork)
 
 	DO_CALL (vfork, 0)
 	cmn	a1, #4096

libpthread/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S

@@ -44,7 +44,7 @@ ENTRY (__vfork)
 	movl	$pthread_create, %eax
 	testl	%eax, %eax
 # endif
-	jne	HIDDEN_JUMPTARGET (__fork)
+	jne	HIDDEN_JUMPTARGET (fork)
 
 	/* Pop the return PC value into ECX.  */
 	popl	%ecx

libpthread/linuxthreads/sysdeps/unix/sysv/linux/ia64/vfork.S

@@ -38,7 +38,7 @@ ENTRY(__vfork)
 #endif
 	ld8 r14 = [r14];;
 	cmp.ne p6, p7 = 0, r14
-(p6)	br.cond.spnt.few HIDDEN_JUMPTARGET (__fork);;
+(p6)	br.cond.spnt.few HIDDEN_JUMPTARGET (fork);;
 	alloc r2=ar.pfs,0,0,2,0
 	mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
 	mov out1=0		/* Standard sp value.			*/

libpthread/linuxthreads/sysdeps/unix/sysv/linux/m68k/vfork.S

@@ -35,7 +35,7 @@ ENTRY (__vfork)
 	.weak	pthread_create
 	movel	#pthread_create, %d0
 #endif
-	jbne	HIDDEN_JUMPTARGET (__fork)
+	jbne	HIDDEN_JUMPTARGET (fork)
 
 #ifdef __NR_vfork
 

libpthread/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S

@@ -66,7 +66,7 @@ ENTRY (__vfork)
 # endif
 
 .Lhidden_fork:
-	b	HIDDEN_JUMPTARGET(__fork)
+	b	HIDDEN_JUMPTARGET(fork)
 
 #endif
 

libpthread/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S

@@ -42,7 +42,7 @@ ENTRY (__vfork)
   ld  10,.LC0@toc(2)
   ld  10,0(10)
   cmpwi  10,0
-  bne-  HIDDEN_JUMPTARGET(__fork)
+  bne-  HIDDEN_JUMPTARGET(fork)
 # else
   .weak  pthread_create
 	lis  10,pthread_create@highest
@@ -80,7 +80,7 @@ ENTRY (__vfork)
 
 # ifndef SHARED
 .Lhidden_fork:
-	b	HIDDEN_JUMPTARGET(__fork)
+	b	HIDDEN_JUMPTARGET(fork)
 .Lsyscall_error:
 	b	JUMPTARGET(__syscall_error)
 # endif

libpthread/linuxthreads/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S

@@ -54,7 +54,7 @@ ENTRY (__vfork)
 	al	%r1,3f-2b(%r1)
 	br	%r1
 3:
-	.long	HIDDEN_JUMPTARGET(__fork)-2b
+	.long	HIDDEN_JUMPTARGET(fork)-2b
 4:
 #ifdef SHARED
 	.long	__libc_pthread_functions-0b

libpthread/linuxthreads/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S

@@ -35,7 +35,7 @@ ENTRY (__vfork)
 	larl	%r1,pthread_create
 #endif
 	ltgr	%r1,%r1
-	jgne	HIDDEN_JUMPTARGET(__fork)
+	jgne	HIDDEN_JUMPTARGET(fork)
 
 	/* Do vfork system call.  */
 	svc	SYS_ify (vfork)

libpthread/linuxthreads/sysdeps/unix/sysv/linux/sh/vfork.S

@@ -70,7 +70,7 @@ ENTRY (__vfork)
 	 nop
 1:
 	.align 2
-.L2:	.long	HIDDEN_JUMPTARGET(__fork)-1b
+.L2:	.long	HIDDEN_JUMPTARGET(fork)-1b
 
 PSEUDO_END (__vfork)
 libc_hidden_def (__vfork)

libpthread/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S

@@ -43,7 +43,7 @@ ENTRY(__vfork)
 	orcc	%o0, %lo(pthread_create), %o0
 #endif
 #if defined SHARED && !defined BROKEN_SPARC_WDISP22
-	bne	HIDDEN_JUMPTARGET(__fork)
+	bne	HIDDEN_JUMPTARGET(fork)
 #else
 	bne	1f
 #endif
@@ -56,7 +56,7 @@ ENTRY(__vfork)
 	 and	%o0, %o1, %o0
 #if !defined SHARED || defined BROKEN_SPARC_WDISP22
 1:	mov	%o7, %g1
-	call	HIDDEN_JUMPTARGET(__fork)
+	call	HIDDEN_JUMPTARGET(fork)
 	 mov	%g1, %o7
 #endif
 	SYSCALL_ERROR_HANDLER

libpthread/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S

@@ -42,7 +42,7 @@ ENTRY(__vfork)
 #endif
 #if defined SHARED && !defined BROKEN_SPARC_WDISP22
 	cmp	%o0, 0
-	bne	HIDDEN_JUMPTARGET(__fork)
+	bne	HIDDEN_JUMPTARGET(fork)
 #else
 	brnz,pn	%o0, 1f
 #endif
@@ -55,7 +55,7 @@ ENTRY(__vfork)
 	 and	%o0, %o1, %o0
 #if !defined SHARED || defined BROKEN_SPARC_WDISP22
 1:	mov	%o7, %g1
-	call	HIDDEN_JUMPTARGET(__fork)
+	call	HIDDEN_JUMPTARGET(fork)
 	 mov	%g1, %o7
 #endif
 	SYSCALL_ERROR_HANDLER

libpthread/linuxthreads/sysdeps/unix/sysv/linux/x86_64/vfork.S

@@ -34,7 +34,7 @@ ENTRY (__vfork)
 	movq	$pthread_create, %rax
 	testq	%rax, %rax
 #endif
-	jne	HIDDEN_JUMPTARGET (__fork)
+	jne	HIDDEN_JUMPTARGET (fork)
 
 	/* Pop the return PC value into RDI.  We need a register that
 	   is preserved by the syscall and that we're allowed to destroy. */

libpthread/nptl/sysdeps/unix/sysv/linux/fork.c

@@ -58,7 +58,6 @@ fresetlockfiles (void)
 #endif
 }
 
-extern __typeof(fork) __libc_fork;
 pid_t
 __libc_fork (void)
 {
@@ -223,7 +222,5 @@ __libc_fork (void)
 
   return pid;
 }
-weak_alias(__libc_fork,__fork)
-libc_hidden_proto(fork)
 weak_alias(__libc_fork,fork)
 libc_hidden_weak(fork)

libpthread/nptl/sysdeps/unix/sysv/linux/pt-fork.c

@@ -19,9 +19,7 @@
 
 #include <unistd.h>
 
-extern int __libc_fork (void);
-
-pid_t
+static pid_t
 __fork (void)
 {
   return __libc_fork ();