5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/setjmp.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 POSIX does not specify whether @code{setjmp} saves the signal mask in the
17 @code{jmp_buf}. It does on BSD platforms, and on glibc platforms when
18 @code{_BSD_SOURCE} is defined; in this case @code{setjmp} behaves like
19 @code{sigsetjmp(.,1)}, and functions @code{_setjmp} and @code{_longjmp} are
20 available that don't save or restore the signal mask. On System V platforms
21 (excluding HP-UX), and on glibc platforms by default, @code{setjmp} doesn't