diff options
Diffstat (limited to 'ext/bigdecimal/feature.h')
| -rw-r--r-- | ext/bigdecimal/feature.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/ext/bigdecimal/feature.h b/ext/bigdecimal/feature.h new file mode 100644 index 0000000000..f628514500 --- /dev/null +++ b/ext/bigdecimal/feature.h @@ -0,0 +1,68 @@ +#ifndef BIGDECIMAL_HAS_FEATURE_H +#define BIGDECIMAL_HAS_FEATURE_H + +/* ======== __has_feature ======== */ + +#ifndef __has_feature +# define __has_feature(_) 0 +#endif + +/* ======== __has_extension ======== */ + +#ifndef __has_extension +# define __has_extension __has_feature +#endif + +/* ======== __has_builtin ======== */ + +#ifdef HAVE_RUBY_INTERNAL_HAS_BUILTIN_H +# include <ruby/internal/has/builtin.h> +#endif + +#ifdef RBIMPL_HAS_BUILTIN +# define BIGDECIMAL_HAS_BUILTIN(...) RBIMPL_HAS_BUILTIN(__VA_ARGS__) + +#else +# /* The following section is copied from CRuby's builtin.h */ +# +# ifdef __has_builtin +# if defined(__INTEL_COMPILER) +# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is +# * reportedly broken. We have to skip them. However the situation can +# * change. They might improve someday. We need to revisit here later. */ +# elif defined(__GNUC__) && ! __has_builtin(__builtin_alloca) +# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of +# * __has_builtin. Cygwin copied that content to be a victim of the +# * broken-ness. We don't take them into account. */ +# else +# define HAVE___HAS_BUILTIN 1 +# endif +# endif +# +# if defined(HAVE___HAS_BUILTIN) +# define BIGDECIMAL_HAS_BUILTIN(_) __has_builtin(_) +# +# elif defined(__GNUC__) +# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _ +# if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 6)) +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 1 +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 1 +# else +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 0 +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 0 +# endif +# elif defined(_MSC_VER) +# define BIGDECIMAL_HAS_BUILTIN(_) 0 +# +# else +# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _ +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL +# endif +#endif /* RBIMPL_HAS_BUILTIN */ + +#ifndef __has_builtin +# define __has_builtin(...) BIGDECIMAL_HAS_BUILTIN(__VA_ARGS__) +#endif + +#endif /* BIGDECIMAL_HAS_FEATURE_H */ |