@node setjmp
@section @code{setjmp}
@findex setjmp

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/setjmp.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
POSIX does not specify whether @code{setjmp} saves the signal mask in the
@code{jmp_buf}.  It does on BSD platforms, and on glibc platforms when
@code{_BSD_SOURCE} is defined; in this case @code{setjmp} behaves like
@code{sigsetjmp(.,1)}, and functions @code{_setjmp} and @code{_longjmp} are
available that don't save or restore the signal mask.  On System V platforms
(excluding HP-UX), and on glibc platforms by default, @code{setjmp} doesn't
save the signal mask.
@end itemize
