Fix doxygen documentation

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1a5554f..a58ffe7 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,7 @@ if(DOXYGEN_FOUND)
    message(STATUS "Doxygen found.")
    set(DOXY_DIR "${CMAKE_SOURCE_DIR}/doc")
    set(DOXY_CONFIG "${DOXY_DIR}/Doxyfile.in")
+   set(top_srcdir ${CMAKE_SOURCE_DIR})
 
    # Copy doxy.config.in
    configure_file("${DOXY_CONFIG}" "${CMAKE_BINARY_DIR}/doxy.config")