cdefs-compat.h

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#ifndef _CDEFS_COMPAT_H_
#define _CDEFS_COMPAT_H_
 
#if !defined(__BEGIN_DECLS)
#if defined(__cplusplus)
#define __BEGIN_DECLS   extern "C" {
#define __END_DECLS }
#else
#define __BEGIN_DECLS
#define __END_DECLS
#endif
#endif /* !defined(__BEGIN_DECLS) */
 
#if defined(__ICCARM__)
#define __volatile volatile
 
 
#elif defined(__GNUC__)
#if defined(__strong_alias) && defined(__NetBSD__)
#define openlibm_strong_reference(sym,alias) __strong_alias(alias,sym)
#elif defined(__strong_reference)
#define openlibm_strong_reference(sym,alias) __strong_reference(sym,alias)
#else
#ifdef __APPLE__
#define openlibm_strong_reference(sym,aliassym) openlibm_weak_reference(sym,aliassym)
#else
#define openlibm_strong_reference(sym,aliassym) \
    OLM_DLLEXPORT extern __typeof (aliassym) aliassym __attribute__ ((__alias__ (#sym)));
#endif /* __APPLE__ */
#endif /* __strong_reference */
 
#ifdef __wasm__
#define openlibm_weak_reference(sym,alias) openlibm_strong_reference(sym,alias)
#elif defined(__weak_alias) && defined(__NetBSD__)
#define openlibm_weak_reference(sym,alias) __weak_alias(alias,sym)
#elif defined(__weak_reference)
#define openlibm_weak_reference(sym,alias) __weak_reference(sym,alias)
#else
#ifdef __ELF__
#ifdef __STDC__
#define openlibm_weak_reference(sym,alias)  \
    __asm__(".weak " #alias);   \
    __asm__(".equ "  #alias ", " #sym)
#ifdef __warn_references
#define openlibm_warn_references(sym,msg) __warn_references(sym,msg)
#else
#define openlibm_warn_references(sym,msg)   \
    __asm__(".section .gnu.warning." #sym); \
    __asm__(".asciz \"" msg "\"");  \
    __asm__(".previous")
#endif /* __warn_references */
#else
#define openlibm_weak_reference(sym,alias)  \
    __asm__(".weak alias");     \
    __asm__(".equ alias, sym")
#ifdef __warn_references
#define openlibm_warn_references(sym,msg) __warn_references(sym,msg)
#else
#define openlibm_warn_references(sym,msg)   \
    __asm__(".section .gnu.warning.sym"); \
    __asm__(".asciz \"msg\"");  \
    __asm__(".previous")
#endif  /* __warn_references */
#endif  /* __STDC__ */
#elif defined(__clang__) /* CLANG */
#if defined(_WIN32) && defined(_X86_)
#define openlibm_asm_symbol_prefix "_"
#else
#define openlibm_asm_symbol_prefix ""
#endif
#ifdef __STDC__
#define openlibm_weak_reference(sym,alias)     \
    __asm__(".weak_reference " openlibm_asm_symbol_prefix #alias); \
    __asm__(".set " openlibm_asm_symbol_prefix #alias ", " openlibm_asm_symbol_prefix #sym)
#else
#define openlibm_weak_reference(sym,alias)     \
    __asm__(".weak_reference openlibm_asm_symbol_prefix/**/alias");\
    __asm__(".set openlibm_asm_symbol_prefix/**/alias, openlibm_asm_symbol_prefix/**/sym")
#endif
#else   /* !__ELF__ */
#ifdef __STDC__
#define openlibm_weak_reference(sym,alias)  \
    __asm__(".stabs \"_" #alias "\",11,0,0,0"); \
    __asm__(".stabs \"_" #sym "\",1,0,0,0")
#ifdef __warn_references
#define openlibm_warn_references(sym,msg) __warn_references(sym,msg)
#else
#define openlibm_warn_references(sym,msg)   \
    __asm__(".stabs \"" msg "\",30,0,0,0");     \
    __asm__(".stabs \"_" #sym "\",1,0,0,0")
#endif /* __warn_references */
#else
#define openlibm_weak_reference(sym,alias)  \
    __asm__(".stabs \"_/**/alias\",11,0,0,0");  \
    __asm__(".stabs \"_/**/sym\",1,0,0,0")
#ifdef __warn_references
#define openlibm_warn_references(sym,msg) __warn_references(sym,msg)
#else
#define openlibm_warn_references(sym,msg)   \
    __asm__(".stabs msg,30,0,0,0");         \
    __asm__(".stabs \"_/**/sym\",1,0,0,0")
#endif  /* __warn_references */
#endif  /* __STDC__ */
#endif  /* __ELF__ */
#endif  /* __weak_reference */
#endif  /* __GNUC__ */
 
 
#endif /* _CDEFS_COMPAT_H_ */