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authorUlrich Drepper <drepper@redhat.com>2006-10-28 06:44:41 +0000
committerUlrich Drepper <drepper@redhat.com>2006-10-28 06:44:41 +0000
commit78fbd00f39d48592d55bd4a022a909c9577b21db (patch)
tree2bf24b213e2eeb96c06422c63ed4108db191e78e /include/libc-symbols.h
parenteb0a3d0cab507fecefe390a340f74ab8e5cf7831 (diff)
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* 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.
Diffstat (limited to 'include/libc-symbols.h')
-rw-r--r--include/libc-symbols.h34
1 files changed, 13 insertions, 21 deletions
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index da46f5e..9eabcbd 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...) \