1if(NOT trout_JSONCPP_ROOT_DIR)
2  set(trout_JSONCPP_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/jsoncpp)
3endif()
4
5if(EXISTS "${trout_JSONCPP_ROOT_DIR}/CMakeLists.txt")
6  set(trout_JSONCPP_INCLUDE_DIRS "${trout_JSONCPP_ROOT_DIR}/include")
7  set(trout_JSONCPP_LIBRARIES "jsoncpp_static")
8  if (NOT TARGET ${trout_JSONCPP_LIBRARIES})
9    add_subdirectory(${trout_JSONCPP_ROOT_DIR} third_party/jsoncpp)
10  endif()
11else()
12    message(FATAL_ERROR "${trout_JSONCPP_ROOT_DIR}/CMakeLists.txt not found")
13endif()
14