relibc_openlibm/include/cdefs-compat.h

#ifndef _CDEFS_COMPAT_H_
#define	_CDEFS_COMPAT_H_

#if (defined(_WIN32) || defined (_MSC_VER)) && !defined(__WIN32__)
    #define __WIN32__
#endif

#ifndef __WIN32__
#include "sys/cdefs.h"

#else //__WIN32__

#if defined(__cplusplus)
#define	__BEGIN_DECLS	extern "C" {
#define	__END_DECLS	}
#else
#define	__BEGIN_DECLS
#define	__END_DECLS
#endif

#ifdef __GNUC__
#define __strong_reference(sym,aliassym)	\
	extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
#ifdef __ELF__
#ifdef __STDC__
#define	__weak_reference(sym,alias)	\
	__asm__(".weak " #alias);	\
	__asm__(".equ "  #alias ", " #sym)
#define	__warn_references(sym,msg)	\
	__asm__(".section .gnu.warning." #sym);	\
	__asm__(".asciz \"" msg "\"");	\
	__asm__(".previous")
#else
#define	__weak_reference(sym,alias)	\
	__asm__(".weak alias");		\
	__asm__(".equ alias, sym")
#define	__warn_references(sym,msg)	\
	__asm__(".section .gnu.warning.sym"); \
	__asm__(".asciz \"msg\"");	\
	__asm__(".previous")
#endif	/* __STDC__ */
#else	/* !__ELF__ */
#ifdef __STDC__
#define __weak_reference(sym,alias)	\
	__asm__(".stabs \"_" #alias "\",11,0,0,0");	\
	__asm__(".stabs \"_" #sym "\",1,0,0,0")
#define __warn_references(sym,msg)	\
	__asm__(".stabs \"" msg "\",30,0,0,0");		\
	__asm__(".stabs \"_" #sym "\",1,0,0,0")
#else
#define __weak_reference(sym,alias)	\
	__asm__(".stabs \"_/**/alias\",11,0,0,0");	\
	__asm__(".stabs \"_/**/sym\",1,0,0,0")
#define __warn_references(sym,msg)	\
	__asm__(".stabs msg,30,0,0,0");			\
	__asm__(".stabs \"_/**/sym\",1,0,0,0")
#endif	/* __STDC__ */
#endif	/* __ELF__ */
#endif	/* __GNUC__ */

#endif


#endif