➕ explicitly add nlohmann_json as a dependency to be found in QMAP

Signed-off-by: burgholzer <[email protected]>

Author: burgholzer

cmake/ExternalDependencies.cmake

@@ -65,6 +65,24 @@ else()
   endif()
 endif()
 
+set(JSON_VERSION
+    3.11.3
+    CACHE STRING "nlohmann_json version")
+set(JSON_URL https://github.com/nlohmann/json/releases/download/v${JSON_VERSION}/json.tar.xz)
+set(JSON_SystemInclude
+    ON
+    CACHE INTERNAL "Treat the library headers like system headers")
+if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.24)
+  FetchContent_Declare(nlohmann_json URL ${JSON_URL} FIND_PACKAGE_ARGS ${JSON_VERSION})
+  list(APPEND FETCH_PACKAGES nlohmann_json)
+else()
+  find_package(nlohmann_json ${JSON_VERSION} QUIET)
+  if(NOT nlohmann_json_FOUND)
+    FetchContent_Declare(nlohmann_json URL ${JSON_URL})
+    list(APPEND FETCH_PACKAGES nlohmann_json)
+  endif()
+endif()
+
 set(PLOG_VERSION
     1.1.10
     CACHE STRING "Plog version")