[sdk/kdesrc-build/docbook_historied_per_file] doc/cmdline: Add build-system query mode

Git commit cfe814deaf97af88fcf007c198206e70d0964868 by Andrew Shark.
Committed on 10/02/2024 at 12:33.
Pushed by ashark into branch 'docbook_historied_per_file'.

Add build-system query mode

Original commit: 139fdc94
https://invent.kde.org/sdk/kdesrc-build/-/commit/139fdc94f4e4a469ff3b0f245a3626f3b58e3556

M  +4    -0    doc/cmdline/supported-cmdline-params.docbook

https://invent.kde.org/sdk/kdesrc-build/-/commit/cfe814deaf97af88fcf007c198206e70d0964868

diff --git a/doc/cmdline/supported-cmdline-params.docbook b/doc/cmdline/supported-cmdline-params.docbook
index 86eaf976..95367ed7 100644
--- a/doc/cmdline/supported-cmdline-params.docbook
+++ b/doc/cmdline/supported-cmdline-params.docbook
@@ -306,6 +306,10 @@ one of the following:</para>
         output the name of module-set which contains the module. This can be used
         to generate zsh autocompletion cache.
         </para></listitem>
+    <listitem><para><parameter>build-system</parameter>, which causes &kdesrc-build; to
+        output the name of build system detected for the module. This can be used
+        to debug build system auto-detection problems, or when developing tests for specific build systems.
+        </para></listitem>
     <listitem><para>Any option name that is valid for modules in the
         <link linkend="conf-options-table">configuration file</link>.
         </para></listitem>