diff -u -r ../unzip60/unix/configure ./unix/configure
--- ../unzip60/unix/configure	2009-04-16 21:25:12.000000000 +0200
+++ ./unix/configure	2017-07-07 02:49:13.106298790 +0200
@@ -418,7 +370,9 @@
 [ $? -ne 0 ] && CFLAGSR="${CFLAGSR} -DNO_ERRNO"
 
 echo Check for directory libraries
 cat > conftest.c << _EOF_
+#include <sys/types.h>
+#include <dirent.h>
 int main() { return closedir(opendir(".")); }
 _EOF_