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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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#ifndef BIGDECIMAL_HAS_FEATURE_H
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#define BIGDECIMAL_HAS_FEATURE_H
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/* ======== __has_feature ======== */
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#ifndef __has_feature
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# define __has_feature(_) 0
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#endif
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/* ======== __has_extension ======== */
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#ifndef __has_extension
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# define __has_extension __has_feature
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#endif
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/* ======== __has_builtin ======== */
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#ifdef HAVE_RUBY_INTERNAL_HAS_BUILTIN_H
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# include <ruby/internal/has/builtin.h>
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#endif
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#ifdef RBIMPL_HAS_BUILTIN
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# define BIGDECIMAL_HAS_BUILTIN(...) RBIMPL_HAS_BUILTIN(__VA_ARGS__)
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#else
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# /* The following section is copied from CRuby's builtin.h */
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#
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# ifdef __has_builtin
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# if defined(__INTEL_COMPILER)
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# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is
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# * reportedly broken. We have to skip them. However the situation can
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# * change. They might improve someday. We need to revisit here later. */
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# elif defined(__GNUC__) && ! __has_builtin(__builtin_alloca)
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# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of
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# * __has_builtin. Cygwin copied that content to be a victim of the
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# * broken-ness. We don't take them into account. */
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# else
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# define HAVE___HAS_BUILTIN 1
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# endif
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# endif
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#
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# if defined(HAVE___HAS_BUILTIN)
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# define BIGDECIMAL_HAS_BUILTIN(_) __has_builtin(_)
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#
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# elif defined(__GNUC__)
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# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _
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# if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 6))
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 1
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 1
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# else
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 0
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 0
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# endif
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# elif defined(_MSC_VER)
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# define BIGDECIMAL_HAS_BUILTIN(_) 0
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#
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# else
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# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ
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# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL
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# endif
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#endif /* RBIMPL_HAS_BUILTIN */
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#ifndef __has_builtin
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# define __has_builtin(...) BIGDECIMAL_HAS_BUILTIN(__VA_ARGS__)
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#endif
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#endif /* BIGDECIMAL_HAS_FEATURE_H */
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