Emulate POSIX_SIGNALS on MS-Windows.

 w32.c (sigemptyset, sigaddset, sigfillset, sigprocmask): New stubs.
 sysdep.c (sys_signal) [WINDOWSNT]: #ifdef away.
 (wait_for_termination) [WINDOWSNT]: Move MS-Windows specific code
 from non-POSIX_SIGNALS section to POSIX_SIGNALS section.
 s/ms-w32.h (POSIX_SIGNALS, struct sigaction, SIG_BLOCK)
 (SIG_SETMASK, SIG_UNBLOCK): Define.

1 files changed, 24 insertions, 0 deletions

diff --git a/src/w32.c b/src/w32.c
index 2ff344abd65..0f2d8b54e6b 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -1482,6 +1482,30 @@ sigunblock (int sig)
 }
 
 int
+sigemptyset (sigset_t *set)
+{
+  return 0;
+}
+
+int
+sigaddset (sigset_t *set, int signo)
+{
+  return 0;
+}
+
+int
+sigfillset (sigset_t *set)
+{
+  return 0;
+}
+
+int
+sigprocmask (int how, const sigset_t *set, sigset_t *oset)
+{
+  return 0;
+}
+
+int
 setpgrp (int pid, int gid)
 {
   return 0;