Update reference to configure.in to refer to configure.ac instead

diff --git a/docs/building/building.xml b/docs/building/building.xml
index 5994d2d..6b8efa7 100644 (file)
--- a/docs/building/building.xml
+++ b/docs/building/building.xml
@@ -2556,7 +2556,7 @@ SplitObjs       = NO
 $ ./configure --enable-hc-boot --enable-hc-boot-unregisterised</screen>
 
              <para>You might need to update
-              <filename>configure.in</filename> to recognise the new
+              <filename>configure.ac</filename> to recognise the new
               platform, and re-generate
               <filename>configure</filename> with
               <literal>autoreconf</literal>.</para>