Re: doc signal handler return type

[Kevin Ryde]

Paul Eggert <address@hidden> writes:
>
> There must be some confusion here, as POSIX.1 clearly requires "void".

New proposed words below, being suitably non-committal.

This is still only on the principle that if something is worth having
an autoconf test for (ie. AC_TYPE_SIGNAL) then it's worth a note about
portability.


`signal' handler
     Normally `signal' takes a handler function with a return type of
     `void', but some old systems required `int' instead.  Any actual
     `int' value returned is not used, this is only a difference in the
     function prototype demanded.

     All systems we know of in current use take `void'.  Presumably
     `int' was to support K&R C, where of course `void' is not
     available.  `AC_TYPE_SIGNAL' (*note Particular Types::) can be
     used to establish the correct type in all cases.