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Add symbol redirection support

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We need this to be able to select different version symbols at
compile-time.
This commit is contained in:
Guillem Jover 2018-05-22 15:43:48 +02:00
parent f1966385b3
commit bf697b900c
1 changed files with 9 additions and 0 deletions
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9
include/bsd/sys/cdefs.h
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@ -76,6 +76,9 @@
#define _SYS_CDEFS_H
#endif
#define LIBBSD_CONCAT(x, y) x ## y
#define LIBBSD_STRING(x) #x
#ifdef __GNUC__
#define LIBBSD_GCC_VERSION (__GNUC__ << 8 | __GNUC_MINOR__)
#else
@ -90,6 +93,12 @@
#define LIBBSD_DEPRECATED(x)
#endif
#if LIBBSD_GCC_VERSION >= 0x0200
#define LIBBSD_REDIRECT(name, proto, alias) name proto __asm__(LIBBSD_ASMNAME(#alias))
#endif
#define LIBBSD_ASMNAME(cname) LIBBSD_ASMNAME_PREFIX(__USER_LABEL_PREFIX__, cname)
#define LIBBSD_ASMNAME_PREFIX(prefix, cname) LIBBSD_STRING(prefix) cname
#ifndef __dead2
# if LIBBSD_GCC_VERSION >= 0x0207
# define __dead2 __attribute__((__noreturn__))