diff options
| author | Bruno Haible <bruno@clisp.org> | 2023-03-16 13:45:40 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2023-03-16 13:45:40 +0100 |
| commit | d7630af4363afdbda443c63400473dc135bc858f (patch) | |
| tree | 010ed5960786ba276ca7e125222f8a21179bd386 /doc | |
| parent | 90356fd2227dd19317d50b9cf40168ccb15e585c (diff) | |
| download | gnulib-d7630af4363afdbda443c63400473dc135bc858f.tar.gz | |
stddef: Define 'unreachable', for ISO C 23 compliance.
* lib/verify.h (_GL_HAS_BUILTIN_UNREACHABLE): Don't define if already
defined.
* lib/stddef.in.h (_GL_HAS_BUILTIN_UNREACHABLE, unreachable): New
macros.
(abort): Declare if needed for unreachable.
* m4/stddef_h.m4 (gl_STDDEF_H): Test for unreachable.
* tests/test-stddef.c (test_unreachable_optimization,
test_unreachable_noreturn): New functions, based on tests/test-verify.c.
* doc/posix-headers/stddef.texi: Mention unreachable.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/posix-headers/stddef.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/posix-headers/stddef.texi b/doc/posix-headers/stddef.texi index e240f93363..33ad48244c 100644 --- a/doc/posix-headers/stddef.texi +++ b/doc/posix-headers/stddef.texi @@ -8,6 +8,10 @@ Gnulib module: stddef Portability problems fixed by Gnulib: @itemize @item +Some platforms fail to provide @code{unreachable}, which was added in C23: +GCC 13, clang 15, AIX with xlc 12.1, Solaris with Sun C 5.15, and others. + +@item Some platforms fail to provide @code{max_align_t}, which was added in C11: NetBSD 8.0, Solaris 11.0, and others. |