diff options
| -rw-r--r-- | include/libc-symbols.h | 14 | ||||
| -rw-r--r-- | include/sys/cdefs.h | 11 |
2 files changed, 21 insertions, 4 deletions
diff --git a/include/libc-symbols.h b/include/libc-symbols.h index 4dc05c76e..2254375ad 100644 --- a/include/libc-symbols.h +++ b/include/libc-symbols.h @@ -156,6 +156,11 @@ # define ASM_LINE_SEP ; #endif +#ifndef __attribute_copy__ +/* Provide an empty definition when cdefs.h is not included. */ +# define __attribute_copy__(arg) +#endif + #ifndef __ASSEMBLER__ /* GCC understands weak symbols and aliases; use its interface where possible, instead of embedded assembly language. */ @@ -163,13 +168,13 @@ /* Define ALIASNAME as a strong alias for NAME. */ # define strong_alias(name, aliasname) _strong_alias(name, aliasname) # define _strong_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((alias (#name))); + extern __typeof (name) aliasname __attribute__ ((alias (#name))) __attribute_copy__ (name); /* Same, but does not check for type match. Use sparingly. Example: strong_alias(stat,stat64) may fail, this one works: */ # define strong_alias_untyped(name, aliasname) \ _strong_alias_untyped(name, aliasname) # define _strong_alias_untyped(name, aliasname) \ - extern __typeof (aliasname) aliasname __attribute__ ((alias (#name))); + extern __typeof (aliasname) aliasname __attribute__ ((alias (#name))) __attribute_copy__ (name); # ifdef HAVE_WEAK_SYMBOLS @@ -182,7 +187,7 @@ If weak aliases are not available, this defines a strong alias. */ # define weak_alias(name, aliasname) _weak_alias (name, aliasname) # define _weak_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); + extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))) __attribute_copy__ (name); /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */ # define weak_extern(symbol) _weak_extern (weak symbol) @@ -423,7 +428,8 @@ FIXME! - ? # define __hidden_asmname2(prefix, name) #prefix name # define __hidden_ver1(local, internal, name) \ extern __typeof (name) __EI_##name __asm__(__hidden_asmname (#internal)); \ - extern __typeof (name) __EI_##name __attribute__((alias (__hidden_asmname1 (,#local)))) + extern __typeof (name) __EI_##name __attribute__((alias (__hidden_asmname1 (,#local)))) \ + __attribute_copy__ (name) # define hidden_ver(local, name) __hidden_ver1(local, __GI_##name, name); # define hidden_data_ver(local, name) hidden_ver(local, name) # define hidden_def(name) __hidden_ver1(__GI_##name, name, name); diff --git a/include/sys/cdefs.h b/include/sys/cdefs.h index a4359a05c..5c4daebcd 100644 --- a/include/sys/cdefs.h +++ b/include/sys/cdefs.h @@ -330,6 +330,17 @@ # endif #endif +/* Undefine (also defined in libc-symbols.h). */ +#undef __attribute_copy__ +#if __GNUC_PREREQ (9, 0) +/* Copies attributes from the declaration or type referenced by + the argument. */ +# define __attribute_copy__(arg) __attribute__ ((__copy__ (arg))) +#else +# define __attribute_copy__(arg) +#endif + + /* GCC 4.3 and above allow passing all anonymous arguments of an __extern_always_inline function to some other vararg function. */ #if __GNUC_PREREQ (4,3) |