diff options
Diffstat (limited to 'include/ruby/internal/has/c_attribute.h')
| -rw-r--r-- | include/ruby/internal/has/c_attribute.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/ruby/internal/has/c_attribute.h b/include/ruby/internal/has/c_attribute.h index b7eb94d22a..69b0f402cd 100644 --- a/include/ruby/internal/has/c_attribute.h +++ b/include/ruby/internal/has/c_attribute.h @@ -17,15 +17,27 @@ * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of - * extension libraries. They could be written in C++98. + * extension libraries. They could be written in C++98. * @brief Defines #RBIMPL_HAS_C_ATTRIBUTE. */ +#include "ruby/internal/has/extension.h" +#include "ruby/internal/has/warning.h" + /** Wraps (or simulates) `__has_c_attribute`. */ #if defined(__cplusplus) # /* Makes no sense. */ # define RBIMPL_HAS_C_ATTRIBUTE(_) 0 +#elif RBIMPL_HAS_EXTENSION(c_attributes) +# /* Hmm. It seems Clang 17 has this macro defined even when -std=c99 mode, +# * _and_ fails to compile complaining that attributes are C2X feature. We +# * need to work around this nonsense. */ +# define RBIMPL_HAS_C_ATTRIBUTE(_) __has_c_attribute(_) + +#elif RBIMPL_HAS_WARNING("-Wc2x-extensions") +# define RBIMPL_HAS_C_ATTRIBUTE(_) 0 + #elif defined(__has_c_attribute) # define RBIMPL_HAS_C_ATTRIBUTE(_) __has_c_attribute(_) |