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* doc/posix-functions/setjmp.texi: Defining _BSD_SOURCE will induce warnings unless _DEFAULT_SOURCE is also defined.
24 lines
818 B
Plaintext
24 lines
818 B
Plaintext
@node setjmp
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@section @code{setjmp}
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@findex setjmp
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/setjmp.html}
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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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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POSIX does not specify whether @code{setjmp} saves the signal mask in the
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@code{jmp_buf}. It does on BSD platforms, and on glibc platforms when
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@code{_BSD_SOURCE} (and/or @code{_DEFAULT_SOURCE} on glibc >= 2.19) is defined;
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in this case @code{setjmp} behaves like @code{sigsetjmp(.,1)}, and functions
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@code{_setjmp} and @code{_longjmp} are available that don't save or restore
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the signal mask. On System V platforms (excluding HP-UX), and on glibc
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platforms by default, @code{setjmp} doesn't save the signal mask.
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@end itemize
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