mirror of
https://git.planet-casio.com/Lephenixnoir/OpenLibm.git
synced 2025-01-01 06:23:39 +01:00
72bfab46a0
In particular, OpenBSD already defines __GNUC_PREREQ__, __BEGIN_DECLS, and __warn_references. Hiding the definitions behind #ifndef guards avoids warnings when building.
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
#ifndef _CDEFS_COMPAT_H_
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#define _CDEFS_COMPAT_H_
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#if !defined(__BEGIN_DECLS)
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#if defined(__cplusplus)
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#define __BEGIN_DECLS extern "C" {
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#define __END_DECLS }
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#else
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#define __BEGIN_DECLS
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#define __END_DECLS
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#endif
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#endif /* !defined(__BEGIN_DECLS) */
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#ifdef __GNUC__
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#ifndef __strong_reference
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#ifdef __APPLE__
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#define __strong_reference(sym,aliassym) __weak_reference(sym,aliassym)
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#else
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#define __strong_reference(sym,aliassym) \
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OLM_DLLEXPORT extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
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#endif /* __APPLE__ */
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#endif /* __strong_reference */
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#ifndef __weak_reference
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#ifdef __ELF__
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".weak " #alias); \
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__asm__(".equ " #alias ", " #sym)
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#ifndef __warn_references
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning." #sym); \
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__asm__(".asciz \"" msg "\""); \
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__asm__(".previous")
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#endif /* __warn_references */
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".weak alias"); \
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__asm__(".equ alias, sym")
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#ifndef __warn_references
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning.sym"); \
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__asm__(".asciz \"msg\""); \
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__asm__(".previous")
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#endif /* __warn_references */
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#endif /* __STDC__ */
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#elif defined(__clang__) /* CLANG */
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".weak_reference " #alias); \
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__asm__(".set " #alias ", " #sym)
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".weak_reference alias");\
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__asm__(".set alias, sym")
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#endif
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#else /* !__ELF__ */
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_" #alias "\",11,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#ifndef __warn_references
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#define __warn_references(sym,msg) \
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__asm__(".stabs \"" msg "\",30,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#endif /* __warn_references */
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_/**/alias\",11,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#ifndef __warn_references
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#define __warn_references(sym,msg) \
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__asm__(".stabs msg,30,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#endif /* __warn_references */
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#endif /* __STDC__ */
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#endif /* __ELF__ */
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#endif /* __weak_reference */
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#endif /* __GNUC__ */
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#endif /* _CDEFS_COMPAT_H_ */
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