Adding missing include for CMake FetchContent_Declare command

grabusr · TheAssassin · commit 254471528b5a · 2024-04-25T03:35:07.000+02:00
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -19,6 +19,7 @@ find_package(nlohmann_json)
 if(NOT nlohmann_json_FOUND)
     message(STATUS "nlohmann_json not found on system, fetching from GitHub")
 
+    include(FetchContent)
     FetchContent_Declare(
         nlohmann_json
         GIT_REPOSITORY https://github.com/nlohmann/json
