New.

testsuites/libtests/POSIX/sigaddset.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2009 by
+ * Ralf Corsépius, Ulm, Germany. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <signal.h>
+
+int
+main (void)
+{
+  sigset_t set;
+  int status;
+  status = sigaddset (&set, 21);
+
+  return status;
+}

testsuites/libtests/POSIX/sigdelset.c

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+/*
+ * Copyright (c) 2009 by
+ * Ralf Corsépius, Ulm, Germany. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <signal.h>
+
+int
+main (void)
+{
+  sigset_t set;
+  int status;
+  status = sigdelset (&set, 21);
+
+  return status;
+}

testsuites/libtests/POSIX/sigemptyset.c

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2009 by
+ * Ralf Corsépius, Ulm, Germany. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <signal.h>
+
+int
+main (void)
+{
+  sigset_t set;
+  int status = sigemptyset (&set);
+
+  return status;
+}

testsuites/libtests/POSIX/sigismember.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2009 by
+ * Ralf Corsépius, Ulm, Germany. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <signal.h>
+
+int
+main (void)
+{
+  sigset_t set;
+  int status;
+  status = sigismember(&set, 21);
+
+  return status;
+}