default features: make musl usable without feature test macros

[musl] / include / ucontext.h

diff --git a/include/ucontext.h b/include/ucontext.h
index 1121761..28d04ea 100644 (file)
--- a/include/ucontext.h
+++ b/include/ucontext.h
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #include <signal.h>
 
 #ifdef _GNU_SOURCE