--- a/make/project.xml	Mon Nov 11 21:42:14 2024 +0100
+++ b/make/project.xml	Tue Nov 12 17:34:04 2024 +0100
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://unixwork.de/uwproj">
+<project version="0.3" xmlns="http://unixwork.de/uwproj">
     <config>
         <var name="src_dir" exec="true">pwd</var>
         <var name="DOXYGEN" exec="true">command -v doxygen</var>
@@ -114,6 +114,12 @@
         <feature name="coverage">
             <dependencies>coverage</dependencies>
         </feature>
+        <feature name="szmul-builtin" default="true">
+            <desc>use custom implementation, instead</desc>
+            <disabled>
+                <define name="CX_NO_SZMUL_BUILTIN"/>
+            </disabled>
+        </feature>
         <dependencies>c,file-tools</dependencies>
     </target>
 </project>