1 files changed, 6 insertions, 0 deletions
diff --git a/signal.c b/signal.c
index 6fb9de0..30189d9 100644
--- a/signal.c
+++ b/signal.c
@@ -5,9 +5,13 @@
  * POSIX thread-aware signal functions.
  */
 
+#include <errno.h>
+
 #include "pthread.h"
 #include "implement.h"
 
+#ifdef HAVE_SIGSET_T
+
 int
 pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
 {
@@ -70,3 +74,5 @@ pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
 
   return 0;
 }
+
+#endif /* HAVE_SIGSET_T */