I get a warning from g++ (2.7.0) and cfront 3.0 on a Unixware machine.
The uname is
UNIX_SV ksg 4.2MP 2.01 i386 x86at.
My question is how do I eliminate the warning/error.  I understand the
problem is do the definition of struct sigaction in <sys/signal.h> as
struct sigaction {
 int sa_flags;
 void (*sa_handler)();
 sigset_t sa_mask;
 int sa_resv[2];
};
This works in C due to the sa_handler declaration being seen as a K&R
declaration. I want to be able to create signal handling routines to
be able to use the argument(s) passed to it.  Is there any way to do
this or do I have to put the signal handling code is separate modules
and compile with a C compiler?  The output for g++ and CC is listed
below followed by the source code.

g++ main.cc
main.cc: In function `int main(int, char **)':
main.cc:15: warning: ANSI C++ prohibits conversion from `(int)' to `(...)'
CC main.cc
"main.cc", line 15: error: a value of type "void (*)(int)" cannot be assigned to an entity of type "void (*)()"
      new_sig.sa_handler =stop;

#include <signal.h>

static int run;
extern "C" {
static void stop(int signal)
{
    run = 0;
    return;
}
}

int main( int argc, char *argv[])
{
    struct sigaction new_sig, old_sig;
    new_sig.sa_handler =stop;
    sigemptyset(&new_sig.sa_mask);
    new_sig.sa_flags = SA_RESTART;
    sigaction(SIGHUP,&new_sig, &old_sig);
    sigaction(SIGKILL,&new_sig, &old_sig);
    run = 1;
    while (run) {

    }
}
--
Kent S. Gordon, Pinpoint Communication
email: kgor@avl.com kgor@ksg.com