signal.h: sa_handler not usable when compiling with `gcc -ansi'

["Anschuetz, Andreas" <aanschuetz at ingenico dot de>]

cygwin: cygwin-1.5.17-1
Win OS tested: Windows 2000

The sa_handler entry of the sigaction structure is not accessible
when I compile with `gcc -ansi' (Makefile and example `signal-test.c'
attached):

gcc -ansi -o signal-ansi signal.c
signal.c: In function `main':
signal.c:13: error: structure has no member named `sa_handler'

The following line caused the error:
   sa_on.sa_handler = sighandler;

The same program is compilable with `gcc -std=gnu89'. I assume that
the anonymous union in `struct sigaction' in /usr/include/cygwin/signal.h
is not iso9899:1990 conform. 

Is compiling with the `-ansi' option not supported by cygwin or is this
a bug?

In case of it is a bug in cygwin I've also included an example patch
which fixes the problem, the code which fixes the problem is taken from
/usr/include/signal.h.

Regards,
   Andreas Anschuetz

Attachment: signal.patch
Description: Text document

#include <signal.h>



void sighandler(int sig)

{

}



int

main(int argc, char* argv[])

{

   static  struct sigaction        sa_on;

   sa_on.sa_flags = 0;

   sa_on.sa_mask = (sigset_t)(0);

   sa_on.sa_handler = sighandler;

}

Attachment: Makefile
Description: Text document