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-rw-r--r--libcxx/include/__config1
1 files changed, 1 insertions, 0 deletions
diff --git a/libcxx/include/__config b/libcxx/include/__config
index 492abf0e546..08ca6006f60 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -21,6 +21,7 @@
#if !_WIN32
#include <unistd.h>
+#include <errno.h> // for ELAST on FreeBSD
#endif
#define _LIBCPP_VERSION 1101
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