feature: support jsoncpp static library (#2528)

Author: moyin1004

CMakeLists.txt

@@ -187,10 +187,19 @@ if(TARGET std::filesystem)
   endif()
 endif()
 
-
 # jsoncpp
-find_package(Jsoncpp REQUIRED)
-target_link_libraries(${PROJECT_NAME} PUBLIC Jsoncpp_lib)
+find_package(jsoncpp QUIET CONFIG)
+if (jsoncpp_FOUND)
+  message(STATUS "jsoncpp found by config")
+  if (USE_STATIC_LIBS_ONLY)
+    target_link_libraries(${PROJECT_NAME} PUBLIC jsoncpp_static)
+  else()
+    target_link_libraries(${PROJECT_NAME} PUBLIC jsoncpp_lib)
+  endif()
+else()
+  find_package(Jsoncpp REQUIRED MODULE)
+  target_link_libraries(${PROJECT_NAME} PUBLIC Jsoncpp_lib)
+endif()
 list(APPEND INCLUDE_DIRS_FOR_DYNAMIC_VIEW ${JSONCPP_INCLUDE_DIRS})
 
 # yamlcpp

cmake/templates/DrogonConfig.cmake.in

@@ -12,7 +12,11 @@
 include(CMakeFindDependencyMacro)
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
 
-find_dependency(Jsoncpp REQUIRED)
+find_package(jsoncpp QUIET CONFIG)
+if(NOT jsoncpp_FOUND)
+  find_dependency(Jsoncpp MODULE REQUIRED)
+endif()
+
 find_dependency(Trantor REQUIRED)
 if(NOT ${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD" AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD" AND NOT WIN32)
 find_dependency(UUID REQUIRED)