Fix yet another aspect of the build breakage caused by r216949 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217001 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/__config b/include/__config index ab066d8..afef593 100644 --- a/include/__config +++ b/include/__config 
@@ -19,6 +19,10 @@  #define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)  #endif   +#if !_WIN32 +#include <unistd.h> +#endif +  #define _LIBCPP_VERSION 1101    #define _LIBCPP_ABI_VERSION 1