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MSVC standard headers use __declspec(noreturn), so #define noreturn to empty on that platform. Reported by Bruno Haible in <http://lists.gnu.org/archive/html/bug-gnulib/2012-02/msg00152.html>. * lib/stdnoreturn.in.h (noreturn): Define to empty on MSVC. * doc/posix-headers/stdnoreturn.texi (stdnoreturn.h): Document this.
33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
@node stdnoreturn.h
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@section @file{stdnoreturn.h}
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POSIX specification:@* Not in POSIX yet, but we expect it will be.
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ISO C11 (latest free draft
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@url{http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf})
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sections 7.23.
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Gnulib module: stdnoreturn
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Portability problems fixed by Gnulib:
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@itemize
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@item
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This header file is missing on most circa-2012 platforms.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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@code{<stdnoreturn.h>} should be #included before @samp{_Noreturn} is used.
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@item
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You cannot assume that @code{_Noreturn} is a reserved word;
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it might be a macro.
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@item
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On MSVC 9, @code{noreturn} expands to the empty token sequence, to avoid
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problems with standard headers that use @code{__declspec (noreturn)}
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directly. Although the resulting code operates correctly, the
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compiler is not informed whether @code{noreturn} functions do not
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return, so it may generate incorrect warnings at compile-time, or code
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that is slightly less optimized. This problem does not occur with
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@code{_Noreturn}.
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@end itemize
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