Integrate nlohmann_json into CMake

Better integration into base/json.cpp

Signed-off-by: Alexander A. Klimov <alexander.klimov@icinga.com>

CMakeLists.txt

@@ -153,6 +153,10 @@ else()
   list(APPEND base_DEPS ${YAJL_LIBRARIES})
 endif()
 
+# JSON
+find_package(JSON)
+include_directories(${JSON_INCLUDE})
+
 find_package(Editline)
 set(HAVE_EDITLINE "${EDITLINE_FOUND}")
 

cmake/FindJSON.cmake

@@ -0,0 +1,9 @@
+FIND_PATH (JSON_INCLUDE json.hpp HINTS "${PROJECT_SOURCE_DIR}/third-party/nlohmann_json")
+
+if (JSON_INCLUDE)
+  set(JSON_BuildTests OFF CACHE INTERNAL "")
+
+  message(STATUS "Found JSON: ${JSON_INCLUDE}" )
+else ()
+  message(FATAL_ERROR "Unable to include json.hpp")
+endif ()

lib/base/json.cpp

@@ -11,6 +11,7 @@
 #include <yajl/yajl_version.h>
 #include <yajl/yajl_gen.h>
 #include <yajl/yajl_parse.h>
+#include <json.hpp>
 #include <stack>
 
 using namespace icinga;