new file mode 100644
--- /dev/null
+++ b/auto/inc
@@ -0,0 +1,35 @@
+
+# Copyright (C) Igor Sysoev
+
+
+echo $ngx_n "checking for $ngx_inc ..." $ngx_c
+echo >> $NGX_ERR
+echo "checking for $ngx_inc" >> $NGX_ERR
+
+ngx_found=no
+
+inc=`echo $ngx_inc | sed -e 's/\./_/' | sed -e 's/\//_/' | tr '[a-z]' '[A-Z]'`
+
+cat << END > $NGX_AUTOTEST.c
+
+#include <$ngx_inc>
+
+int main() {
+    return 0;
+}
+
+END
+
+eval "${CC} -o $NGX_AUTOTEST $NGX_AUTOTEST.c >> $NGX_ERR 2>&1"
+
+if [ -x $NGX_AUTOTEST ]; then
+    echo " found"
+    have=HAVE_$inc . auto/have
+    eval "NGX_$inc='#include <$ngx_inc>'"
+    ngx_found=yes
+
+else
+    echo " not found"
+fi
+
+rm $NGX_AUTOTEST*