@node _longjmp
@section @code{_longjmp}
@findex _longjmp

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

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Solaris 2.5.1, mingw.
@end itemize

Note: A future revision of POSIX later than the 2008/2009 one may drop the
functions @code{_setjmp} and @code{_longjmp}.  Still, in 2008, on all
systems which have @code{_setjmp}, it is the fastest way to save the
registers but not the signal mask (up to 30 times faster than @code{setjmp}
on some systems).
