Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -367,6 +367,7 @@
 #elif defined(__ANDROID__)
 #define _LIBCPP_HAS_QUICK_EXIT
 #elif defined(__linux__)
+#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
 #include <features.h>
 #if __GLIBC_PREREQ(2, 15)
 #define _LIBCPP_HAS_QUICK_EXIT
@@ -376,6 +377,7 @@
 #endif
 #endif
 #endif
+#endif
 
 #if (__has_feature(cxx_noexcept))
 #  define _NOEXCEPT noexcept