commit 8884ce6e02f8f1ea0b15823c11c1e1bb7629523b
from: Omar Polo <op@omarpolo.com>
date: Sun Jul 25 22:21:10 2021 UTC

include err.h if available

commit - 76468fa91fdf8716b6a0db1f3b2c4879ab719e7b
commit + 8884ce6e02f8f1ea0b15823c11c1e1bb7629523b
blob - aceaa303c6656eed15371c6c5a7f93349603ae37
blob + 2a597fe2fa46d79a76c546f5a2a62cfb13b48081
--- compat.h
+++ compat.h
@@ -65,6 +65,8 @@ void		 err(int, const char *, ...);
 void		 errx(int, const char *, ...);
 void		 warn(int, const char *, ...);
 void		 warnx(int, const char *, ...);
+#else
+#include <err.h>
 #endif
 
 #ifndef FREEZERO