sigdelset

[Jeff Johnston]

Timo Weggen wrote:
> Hello,
> 
> (first post). I am using newlib 1.14.0. I discovered that on the nosys 
> platform "sigaddset" is defined (via preprocessor), but sigdelset is not 
> defined. What is the desired policy for the signal set family of 
> functions? Are they beyond scope of newlib? I just want know wether I 
> should modify newlib (for me) here to add them in for the nosys 
> configuration, or this in some way is the application's responsibility.
> 
> TIA, hope that wasn't convered before,
> Timo.
> 

Posix signal handling is not part of vanilla newlib.  Some systems like 
Cygwin, RTEMS, and Linux do add support, but you can't expect it by default.

Now, that said, there are some default macros in 
libc/include/sys/signal.h defining a rudimentary sigaddset and 
sigemptyset.  Offhand, there is no reason sigdelset, sigfillset, or 
sigismember could not be added in the same vein.  I will check in a 
patch shortly.  If you need the actual signal handling functions, then 
you will have some work to do.

-- Jeff J.