Re-Revert "Temporary revert "process.c: dead code when no SIGCHLD""

This re-reverts commit r64447.
The issue was machine side problem.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64493 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/signal.c b/signal.c
index 013425bfb6..326179f383 100644
--- a/signal.c
+++ b/signal.c
@@ -531,7 +531,9 @@ static struct {
     rb_atomic_t cnt[RUBY_NSIG];
     rb_atomic_t size;
 } signal_buff;
+#if RUBY_SIGCHLD
 volatile unsigned int ruby_nocldwait;
+#endif
 
 #ifdef __dietlibc__
 #define sighandler_t sh_t
@@ -615,7 +617,8 @@ ruby_signal(int signum, sighandler_t handler)
 #endif
 
     switch (signum) {
-      case SIGCHLD:
+#if RUBY_SIGCHLD
+      case RUBY_SIGCHLD:
 	if (handler == SIG_IGN) {
 	    ruby_nocldwait = 1;
 	    if (sigact.sa_flags & SA_SIGINFO) {
@@ -629,6 +632,7 @@ ruby_signal(int signum, sighandler_t handler)
 	    ruby_nocldwait = 0;
 	}
 	break;
+#endif
 #if defined(SA_ONSTACK) && defined(USE_SIGALTSTACK)
       case SIGSEGV:
 #ifdef SIGBUS