Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -317,7 +317,7 @@
 #if defined(__FreeBSD__)
 #define _LIBCPP_HAS_QUICK_EXIT
 #define _LIBCPP_HAS_C11_FEATURES
-#elif defined(__linux__)
+#elif defined(__linux__) && defined(__GLIBC__)
 #include <features.h>
 #if __GLIBC_PREREQ(2, 15)
 #define _LIBCPP_HAS_QUICK_EXIT