diff -r 01ec9f32835e -r ea36fd802446 test/make/uwproj.xsd
--- a/test/make/uwproj.xsd	Sat Jan 20 14:56:50 2024 +0100
+++ b/test/make/uwproj.xsd	Sat Jan 20 15:37:16 2024 +0100
@@ -102,9 +102,11 @@
                 </p>
                 <p>
                     The optional <code>platform</code> attribute may specify a <em>single</em> platform identifier and
-                    the optional <code>not</code> attribute may specify a comma-separated list of platform identifiers.
-                    The configure script shall skip this dependency declaration if the detected platform is not
-                    matching the filter specification of these attributes.
+                    the optional <code>toolchain</code> attribute may specify a <em>single</em> toolchain.
+                    The optional <code>not</code> attribute may specify a comma-separated list of platform and/or
+                    toolchain identifiers.
+                    The configure script shall skip this dependency declaration if the detected platform and toolchain
+                    is not matching the filter specification of these attributes.
                 </p>
             </xs:documentation>
         </xs:annotation>
@@ -125,6 +127,7 @@
         </xs:choice>
         <xs:attribute name="name" type="xs:string"/>
         <xs:attribute name="platform" type="xs:string"/>
+        <xs:attribute name="toolchain" type="xs:string"/>
         <xs:attribute name="not" type="xs:string"/>
     </xs:complexType>