Commit 8b62c05c authored by Pádraig Brady's avatar Pádraig Brady

doc: mention that _BSD_SOURCE is deprecated for _DEFAULT_SOURCE

* doc/posix-functions/setjmp.texi: Defining _BSD_SOURCE will induce
warnings unless _DEFAULT_SOURCE is also defined.
parent 9ee6573b
......@@ -15,9 +15,9 @@ Portability problems not fixed by Gnulib:
@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.
@code{_BSD_SOURCE} (and/or @code{_DEFAULT_SOURCE} on glibc >= 2.19) 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
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