related to #1693 changed smarty version to 4.1.0

include/smarty/docs/programmers/api-functions/api-set-compile-dir.md

@@ -0,0 +1,32 @@
+setCompileDir()
+
+set the directory where compiled templates are stored
+
+Description
+===========
+
+Smarty
+
+setCompileDir
+
+string
+
+compile\_dir
+
+
+    <?php
+
+    // set directory where compiled templates are stored
+    $smarty->setCompileDir('./templates_c');
+
+    // chaining of method calls
+    $smarty->setTemplateDir('./templates')
+           ->setCompileDir('./templates_c')
+           ->setCacheDir('./cache');
+
+    ?>
+
+       
+
+See also [`getCompileDir()`](#api.get.compile.dir) and
+[`$compile_dir`](#variable.compile.dir).