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Support for FreeBSD <sys/cdefs.h>

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FreeBSD's <sys/cdefs.h> is broken.  Cygwin is also affected by that.
We need to avoid using them.

See also:
d1c67819db
https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;f=newlib/libc/include/sys/cdefs.h;h=44d6d53977e6bc82c2b1e6dbe8ae7f310b260604
This commit is contained in:
卜部昌平 2020-04-16 14:17:15 +09:00
parent 155f64e3c4
commit 48273534c7
2 changed files with 24 additions and 3 deletions
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12
include/ruby/3/has/attribute.h
View File

@ -24,8 +24,18 @@
#include "ruby/3/compiler_since.h"
#include "ruby/3/token_paste.h"
#ifndef __has_attribute
# /* Don't bother. */
#elif RUBY3_COMPILER_IS(GCC) && ! __has_attribute(pure)
# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of
# * __has_attribute. Cygwin copied that content to be a victim of the broken-
# * ness. We don't take them into account. */
#else
# define RUBY3_HAVE___HAS_ATTRIBUTE 1
#endif
/** Wraps (or simulates) `__has_attribute`. */
#if defined(__has_attribute)
#if defined(RUBY3_HAVE___HAS_ATTRIBUTE)
# define RUBY3_HAS_ATTRIBUTE(_) __has_attribute(_)
#elif RUBY3_COMPILER_IS(GCC)

15
include/ruby/3/has/builtin.h
View File

@ -24,11 +24,22 @@
#include "ruby/3/compiler_since.h"
#include "ruby/3/token_paste.h"
/** Wraps (or simulates) `__has_builtin`. */
#if defined(__has_builtin) && ! RUBY3_COMPILER_IS(Intel)
#ifndef __has_builtin
# /* Don't bother. */
#elif RUBY3_COMPILER_IS(Intel)
# /* :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 RUBY3_COMPILER_IS(GCC) && ! __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 RUBY3_HAVE___HAS_BUILTIN 1
#endif
/** Wraps (or simulates) `__has_builtin`. */
#if defined(RUBY3_HAVE___HAS_BUILTIN)
# define RUBY3_HAS_BUILTIN(_) __has_builtin(_)
#elif RUBY3_COMPILER_IS(GCC)