diff options
Diffstat (limited to 'lib/stddef.in.h')
| -rw-r--r-- | lib/stddef.in.h | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/lib/stddef.in.h b/lib/stddef.in.h index 6eadcc3d5a4..431e819b8bf 100644 --- a/lib/stddef.in.h +++ b/lib/stddef.in.h @@ -18,7 +18,7 @@ /* Written by Eric Blake. */ /* - * POSIX 2008 <stddef.h> for platforms that have issues. + * POSIX 2008 and ISO C 23 <stddef.h> for platforms that have issues. * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stddef.h.html> */ @@ -37,9 +37,9 @@ remember if special invocation has ever been used to obtain wint_t, in which case we need to clean up NULL yet again. */ -# if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T) +# if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _@GUARD_PREFIX@_STDDEF_WINT_T) # ifdef __need_wint_t -# define _GL_STDDEF_WINT_T +# define _@GUARD_PREFIX@_STDDEF_WINT_T # endif # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ /* On TinyCC, make sure that the macros that indicate the special invocation @@ -69,6 +69,7 @@ typedef long rpl_max_align_t; typedef long max_align_t; # define _MAX_ALIGN_T # endif +# define __CLANG_MAX_ALIGN_T_DEFINED # define GNULIB_defined_max_align_t 1 # endif # endif @@ -79,7 +80,7 @@ typedef long max_align_t; /* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */ # if (@REPLACE_NULL@ \ - && (!defined _@GUARD_PREFIX@_STDDEF_H || defined _GL_STDDEF_WINT_T)) + && (!defined _@GUARD_PREFIX@_STDDEF_H || defined _@GUARD_PREFIX@_STDDEF_WINT_T)) # undef NULL # ifdef __cplusplus /* ISO C++ says that the macro NULL must expand to an integer constant @@ -100,6 +101,11 @@ typedef long max_align_t; # ifndef _@GUARD_PREFIX@_STDDEF_H # define _@GUARD_PREFIX@_STDDEF_H +/* This file uses _Noreturn. */ +#if !_GL_CONFIG_H_INCLUDED + #error "Please include config.h first." +#endif + /* Some platforms lack wchar_t. */ #if !@HAVE_WCHAR_T@ # define wchar_t int @@ -137,11 +143,49 @@ typedef union long int __i _GL_STDDEF_ALIGNAS (long int); } rpl_max_align_t; # define max_align_t rpl_max_align_t +# define __CLANG_MAX_ALIGN_T_DEFINED # define GNULIB_defined_max_align_t 1 # endif # endif #endif +/* ISO C 23 ยง 7.21.1 The unreachable macro */ +#ifndef unreachable + +/* Code borrowed from verify.h. */ +# ifndef _GL_HAS_BUILTIN_UNREACHABLE +# if defined __clang_major__ && __clang_major__ < 5 +# define _GL_HAS_BUILTIN_UNREACHABLE 0 +# elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) +# define _GL_HAS_BUILTIN_UNREACHABLE 1 +# elif defined __has_builtin +# define _GL_HAS_BUILTIN_UNREACHABLE __has_builtin (__builtin_unreachable) +# else +# define _GL_HAS_BUILTIN_UNREACHABLE 0 +# endif +# endif + +# if _GL_HAS_BUILTIN_UNREACHABLE +# define unreachable() __builtin_unreachable () +# elif 1200 <= _MSC_VER +# define unreachable() __assume (0) +# else +/* Declare abort(), without including <stdlib.h>. */ +extern +# if defined __cplusplus +"C" +# endif +_Noreturn +void abort (void) +# if defined __cplusplus && (__GLIBC__ >= 2) +throw () +# endif +; +# define unreachable() abort () +# endif + +#endif + # endif /* _@GUARD_PREFIX@_STDDEF_H */ # endif /* _@GUARD_PREFIX@_STDDEF_H */ #endif /* __need_XXX */ |