default features: make musl usable without feature test macros

[musl] / include / sys / sem.h

diff --git a/include/sys/sem.h b/include/sys/sem.h
index add3f1c..cc3a3e6 100644 (file)
--- a/include/sys/sem.h
+++ b/include/sys/sem.h
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_size_t
 #define __NEED_pid_t
 #define __NEED_time_t