Index: docs/JSONCompilationDatabase.rst
===================================================================
--- docs/JSONCompilationDatabase.rst
+++ docs/JSONCompilationDatabase.rst
@@ -26,12 +26,20 @@
    require serialization of the runs according to the build dependency
    graph.
 
-Supported Systems
-=================
+Supported Build Systems
+=======================
 
-Currently `CMake <http://cmake.org>`_ (since 2.8.5) supports generation
-of compilation databases for Unix Makefile builds (Ninja builds in the
-works) with the option ``CMAKE_EXPORT_COMPILE_COMMANDS``.
+-  `CMake <http://cmake.org>`_ (since 2.8.5) supports generation
+   of compilation databases for Unix Makefile builds (Ninja builds in the
+   works) with the option ``CMAKE_EXPORT_COMPILE_COMMANDS``.
+-  `xctool <https://github.com/facebook/xctool>`_ supports generation
+   of compilation databases via the ``json-compilation-database``
+   `reporter <https://github.com/facebook/xctool#reporters>`_.
+-  `Buck <https://buckbuild.com/>`_ supports generation
+   of compilation databases via the ``compilation-database`` flavor.
+
+Other Supported Systems
+=======================
 
 For projects on Linux, there is an alternative to intercept compiler
 calls with a tool called `Bear <https://github.com/rizsotto/Bear>`_.