From 78fbd00f39d48592d55bd4a022a909c9577b21db Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sat, 28 Oct 2006 06:44:41 +0000
Subject: * configure.in: Require assembler support for visibility, compiler

	support for visibility and aliases, linker support for various -z
	options.
	* Makeconfig: Remove conditional code which now is unnecessary.
	* config.h.in: Likewise.
	* config.make.in: Likewise.
	* dlfcn/Makefile: Likewise.
	* elf/Makefile: Likewise.
	* elf/dl-load.c: Likewise.
	* elf/rtld.c: Likewise.
	* include/libc-symbols.h: Likewise.
	* include/stdio.h: Likewise.
	* io/Makefile: Likewise.
	* io/fstat.c: Likewise.
	* io/fstat64.c: Likewise.
	* io/fstatat.c: Likewise.
	* io/fstatat64.c: Likewise.
	* io/lstat.c: Likewise.
	* io/lstat64.c: Likewise.
	* io/mknod.c: Likewise.
	* io/mknodat.c: Likewise.
	* io/stat.c: Likewise.
	* io/stat64.c: Likewise.
	* libio/stdio.c: Likewise.
	* nscd/Makefile: Likewise.
	* stdlib/Makefile: Likewise.
	* stdlib/atexit.c: Likewise.
	* sysdeps/generic/ldsodefs.h: Likewise.
	* sysdeps/i386/dl-machine.h: Likewise.
	* sysdeps/i386/sysdep.h: Likewise.
	* sysdeps/i386/i686/memcmp.S: Likewise.
	* sysdeps/powerpc/powerpc32/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sigaction.c: Likewise.
---
 include/libc-symbols.h | 34 +++++++++++++---------------------
 include/stdio.h        |  1 -
 2 files changed, 13 insertions(+), 22 deletions(-)

(limited to 'include')

diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index da46f5e804..9eabcbd354 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -114,6 +114,13 @@
 #  define _weak_alias(name, aliasname) \
   extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
 
+/* Same as WEAK_ALIAS, but mark symbol as hidden.  */
+#  define weak_hidden_alias(name, aliasname) \
+  _weak_hidden_alias (name, aliasname)
+#  define _weak_hidden_alias(name, aliasname) \
+  extern __typeof (name) aliasname \
+    __attribute__ ((weak, alias (#name), __visibility__ ("hidden")));
+
 /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined).  */
 #  define weak_extern(symbol) _weak_extern (weak symbol)
 #  define _weak_extern(expr) _Pragma (#expr)
@@ -121,6 +128,7 @@
 # else
 
 #  define weak_alias(name, aliasname) strong_alias(name, aliasname)
+#  define weak_hidden_alias(name, aliasname) strong_alias(name, aliasname)
 #  define weak_extern(symbol) /* Nothing. */
 
 # endif
@@ -431,8 +439,7 @@ for linking")
   strong_alias(real, name)
 #endif
 
-#if defined HAVE_VISIBILITY_ATTRIBUTE \
-    && (defined SHARED || defined LIBC_NONSHARED)
+#if defined SHARED || defined LIBC_NONSHARED
 # define attribute_hidden __attribute__ ((visibility ("hidden")))
 #else
 # define attribute_hidden
@@ -444,11 +451,7 @@ for linking")
 # define attribute_tls_model_ie
 #endif
 
-#ifdef HAVE_Z_RELRO
-# define attribute_relro __attribute__ ((section (".data.rel.ro")))
-#else
-# define attribute_relro
-#endif
+#define attribute_relro __attribute__ ((section (".data.rel.ro")))
 
 /* Handling on non-exported internal names.  We have to do this only
    for shared code.  */
@@ -457,14 +460,9 @@ for linking")
 # define INTDEF(name) strong_alias (name, name##_internal)
 # define INTVARDEF(name) \
   _INTVARDEF (name, name##_internal)
-# if defined HAVE_VISIBILITY_ATTRIBUTE
-#  define _INTVARDEF(name, aliasname) \
+# define _INTVARDEF(name, aliasname) \
   extern __typeof (name) aliasname __attribute__ ((alias (#name), \
 						   visibility ("hidden")));
-# else
-#  define _INTVARDEF(name, aliasname) \
-  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
-# endif
 # define INTDEF2(name, newname) strong_alias (name, newname##_internal)
 # define INTVARDEF2(name, newname) _INTVARDEF (name, newname##_internal)
 #else
@@ -549,16 +547,10 @@ for linking")
    versioned_symbol (libc, __real_foo, foo, GLIBC_2_1);
    libc_hidden_ver (__real_foo, foo)  */
 
-#if defined SHARED && defined DO_VERSIONING \
-    && !defined HAVE_BROKEN_ALIAS_ATTRIBUTE && !defined NO_HIDDEN
+#if defined SHARED && defined DO_VERSIONING && !defined NO_HIDDEN
 # ifndef __ASSEMBLER__
-#  if !defined HAVE_VISIBILITY_ATTRIBUTE \
-      || defined HAVE_BROKEN_VISIBILITY_ATTRIBUTE
-#   define __hidden_proto_hiddenattr(attrs...)
-#  else
-#   define __hidden_proto_hiddenattr(attrs...) \
+#  define __hidden_proto_hiddenattr(attrs...) \
   __attribute__ ((visibility ("hidden"), ##attrs))
-#  endif
 #  define hidden_proto(name, attrs...) \
   __hidden_proto (name, __GI_##name, ##attrs)
 #  define __hidden_proto(name, internal, attrs...) \
diff --git a/include/stdio.h b/include/stdio.h
index e040380d79..b293b8f1c7 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -131,7 +131,6 @@ libc_hidden_proto (__vsnprintf_chk)
 libc_hidden_proto (__vfprintf_chk)
 
 #  if !defined NOT_IN_libc && defined SHARED && defined DO_VERSIONING \
-  && defined HAVE_VISIBILITY_ATTRIBUTE && !defined HAVE_BROKEN_ALIAS_ATTRIBUTE\
   && !defined NO_HIDDEN
 /* Special gcc builtins.  */
 extern size_t __builtin_fwrite (const void *, size_t, size_t, void *)
-- 
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