Move hack to external-deps.cmake.

CMakeLists.txt

@@ -17,5 +17,5 @@ find_package(OpenSSL)
 add_library(jwp-plugin SHARED src/jwp-plugin.cpp)
 
 add_executable(jwt-example src/jwt-example.cpp)
-target_include_directories(jwt-example PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/jwt-cpp/include)
+target_include_directories(jwt-example PRIVATE ${jwt-cpp_INCLUDE_DIR})
 target_link_libraries(jwt-example OpenSSL::Crypto)

external-deps.cmake

@@ -13,7 +13,7 @@ ExternalProject_Add(ep_jwt-cpp
   BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/jwt-cpp
 )
 list (APPEND EXTRA_CMAKE_ARGS
-  -Djwt-cpp_DIR=${CMAKE_CURRENT_BINARY_DIR}/jwt-cpp
+  -Djwt-cpp_DIR=${CMAKE_CURRENT_BINARY_DIR}/jwt-cpp -Djwt-cpp_INCLUDE_DIR=${CMAKE_CURRENT_BINARY_DIR}/jwt-cpp/include
 )
 
 ExternalProject_Add (ep_jwp-mosquitto-plugin