2017-06-12 Wilco Dijkstra <wdijkstr@arm.com>

There is no longer a need for string2.h, so remove it and all mention of it.
Move the redirect for __stpcpy to include/string.h since it is still required
until all internal uses have been renamed.
This fixes several linknamespace/localplt failures when building with -Os.

	[BZ #15105]
	[BZ #19463]
	* include/string.h: Add internal redirect for __stpcpy.
	* string/Makefile: Remove bits/string2.h.
	* string/string.h: Update comment.
	* string/string-inlines.c: Remove bits/string2.h include and comment.
	* string/bits/string2.h: Remove file.

4 files changed, 4 insertions, 134 deletions

diff --git a/string/Makefile b/string/Makefile
index f317d02a8c..8d0d6b0873 100644
--- a/string/Makefile
+++ b/string/Makefile
@@ -24,8 +24,8 @@ include ../Makeconfig
 
 headers	:= string.h strings.h memory.h endian.h bits/endian.h \
 	   argz.h envz.h byteswap.h bits/byteswap.h bits/byteswap-16.h \
-	   bits/string.h bits/string2.h bits/string3.h \
-	   bits/strings_fortified.h bits/uintn-identity.h
+	   bits/string.h bits/string3.h bits/strings_fortified.h \
+	   bits/uintn-identity.h
 
 routines	:= strcat strchr strcmp strcoll strcpy strcspn		\
 		   strverscmp strdup strndup				\
diff --git a/string/bits/string2.h b/string/bits/string2.h
deleted file mode 100644
index 6a26e2bc68..0000000000
--- a/string/bits/string2.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/* Machine-independant string function optimizations.
-   Copyright (C) 1997-2017 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
-
-   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 _STRING_H
-# error "Never use <bits/string2.h> directly; include <string.h> instead."
-#endif
-
-#ifndef __NO_STRING_INLINES
-
-/* Unlike the definitions in the header <bits/string.h> the
-   definitions contained here are not optimized down to assembler
-   level.  Those optimizations are not always a good idea since this
-   means the code size increases a lot.  Instead the definitions here
-   optimize some functions in a way which do not dramatically
-   increase the code size and which do not use assembler.  The main
-   trick is to use GCC's `__builtin_constant_p' function.
-
-   Every function XXX which has a defined version in
-   <bits/string.h> must be accompanied by a symbol _HAVE_STRING_ARCH_XXX
-   to make sure we don't get redefinitions.
-
-   We must use here macros instead of inline functions since the
-   trick won't work with the latter.  */
-
-#ifndef __STRING_INLINE
-# ifdef __cplusplus
-#  define __STRING_INLINE inline
-# else
-#  define __STRING_INLINE __extern_inline
-# endif
-#endif
-
-/* Dereferencing a pointer arg to run sizeof on it fails for the void
-   pointer case, so we use this instead.
-   Note that __x is evaluated twice. */
-#define __string2_1bptr_p(__x) \
-  ((size_t)(const void *)((__x) + 1) - (size_t)(const void *)(__x) == 1)
-
-/* Set N bytes of S to 0.  */
-#if !defined _HAVE_STRING_ARCH_memset
-# define __bzero(s, n) __builtin_memset (s, '\0', n)
-#endif
-
-
-/* Copy SRC to DEST, returning pointer to final NUL byte.  */
-#ifdef __USE_GNU
-# ifndef _HAVE_STRING_ARCH_stpcpy
-#  define __stpcpy(dest, src) __builtin_stpcpy (dest, src)
-/* In glibc we use this function frequently but for namespace reasons
-   we have to use the name `__stpcpy'.  */
-#  define stpcpy(dest, src) __stpcpy (dest, src)
-# endif
-#endif
-
-
-/* Copy no more than N characters of SRC to DEST.  */
-#ifndef _HAVE_STRING_ARCH_strncpy
-# define strncpy(dest, src, n) __builtin_strncpy (dest, src, n)
-#endif
-
-
-/* Append no more than N characters from SRC onto DEST.  */
-#ifndef _HAVE_STRING_ARCH_strncat
-# ifdef _USE_STRING_ARCH_strchr
-#  define strncat(dest, src, n) \
-  (__extension__ ({ char *__dest = (dest);				      \
-		    __builtin_constant_p (src) && __builtin_constant_p (n)    \
-		    ? (strlen (src) < ((size_t) (n))			      \
-		       ? strcat (__dest, src)				      \
-		       : (*((char *) __mempcpy (strchr (__dest, '\0'),	      \
-						src, n)) = '\0', __dest))     \
-		    : strncat (dest, src, n); }))
-# else
-#  define strncat(dest, src, n) __builtin_strncat (dest, src, n)
-# endif
-#endif
-
-
-/* Return the length of the initial segment of S which
-   consists entirely of characters not in REJECT.  */
-#ifndef _HAVE_STRING_ARCH_strcspn
-# define strcspn(s, reject) __builtin_strcspn (s, reject)
-#endif
-
-
-/* Return the length of the initial segment of S which
-   consists entirely of characters in ACCEPT.  */
-#ifndef _HAVE_STRING_ARCH_strspn
-# define strspn(s, accept) __builtin_strspn (s, accept)
-#endif
-
-
-/* Find the first occurrence in S of any character in ACCEPT.  */
-#ifndef _HAVE_STRING_ARCH_strpbrk
-# define strpbrk(s, accept) __builtin_strpbrk (s, accept)
-#endif
-
-
-#ifndef _FORCE_INLINES
-# undef __STRING_INLINE
-#endif
-
-#endif /* No string inlines.  */
diff --git a/string/string-inlines.c b/string/string-inlines.c
index fa4a1594b2..55c99845aa 100644
--- a/string/string-inlines.c
+++ b/string/string-inlines.c
@@ -15,9 +15,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-/*  <bits/string.h> and <bits/string2.h> declare some extern inline
-    functions.  These functions are declared additionally here if
-    inlining is not possible.  */
+/*  <bits/string.h> may declare some extern inline functions.
+    These functions are defined here if inlining is not possible.  */
 
 #undef __USE_STRING_INLINES
 #define __USE_STRING_INLINES
@@ -31,8 +30,6 @@
 
 #undef __NO_INLINE__
 #include <bits/string.h>
-#include <bits/string2.h>
-
 #include "shlib-compat.h"
 
 #if SHLIB_COMPAT (libc, GLIBC_2_1_1, GLIBC_2_25)
diff --git a/string/string.h b/string/string.h
index 8eed67d77d..d1a274628f 100644
--- a/string/string.h
+++ b/string/string.h
@@ -501,19 +501,11 @@ extern char *basename (const char *__filename) __THROW __nonnull ((1));
 	__USE_STRING_INLINES
      is defined before including this header.
 
-   - machine-independent optimizations which do not increase the
-     code size significantly and which optimize mainly situations
-     where one or more arguments are compile-time constants.
-     These optimizations are used always when the compiler is
-     taught to optimize.
-
    One can inhibit all optimizations by defining __NO_STRING_INLINES.  */
 
 /* Get the machine-dependent optimizations (if any).  */
 #  include <bits/string.h>
 
-/* These are generic optimizations which do not add too much inline code.  */
-#  include <bits/string2.h>
 # endif
 
 # if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function