Document how to disable tests
diff --git a/src/site/apt/building/cmake.apt b/src/site/apt/building/cmake.apt
index d76afc9..4a7158d 100644
--- a/src/site/apt/building/cmake.apt
+++ b/src/site/apt/building/cmake.apt
@@ -43,6 +43,8 @@
*------------------------+---------------------------------------------------------------------------------------------+
| -DLOG4CXX_CFSTRING=yes | Enable CFString API methods, requires Mac OS/X CoreFoundation, choice of yes, no (default). |
*------------------------+---------------------------------------------------------------------------------------------+
+| -DBUILD_TESTING=off | Disable tests. Tests are enabled by default |
+*------------------------+---------------------------------------------------------------------------------------------+
Building and testing log4cxx on a Microsoft Windows with APR, Expat and APR-Util built from source
extracted into apr-1.7.0, libexpat(from github) and apr-util-1.6.1 in %HOMEPATH%\Libraries.