From 2891de2fcdcb25b130070836cab75fcbbd4b1ec6 Mon Sep 17 00:00:00 2001
From: "Daniel J. Hofmann" <daniel@trvx.org>
Date: Thu, 10 Sep 2015 19:02:05 +0200
Subject: [PATCH] Add dependency on Dot to CMakeLists for Doxygen integration.

Reference:

- http://www.cmake.org/cmake/help/v3.0/module/FindDoxygen.html
---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89f8b145a..36bd7548d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -369,11 +369,11 @@ endif()
 
 # add a target to generate API documentation with Doxygen
 find_package(Doxygen)
-if(DOXYGEN_FOUND)
+if(DOXYGEN_FOUND AND DOXYGEN_DOT_FOUND)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
 add_custom_target(doc
 ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
 WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
 COMMENT "Generating API documentation with Doxygen" VERBATIM
 )
-endif(DOXYGEN_FOUND)
+endif()