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* configure.in: Require assembler support for visibility, compiler

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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.
This commit is contained in:
Ulrich Drepper
2006-10-28 06:44:41 +00:00
parent eb0a3d0cab
commit 78fbd00f39
35 changed files with 166 additions and 288 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
include/libc-symbols.h
View File

@@ -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...) \