How to integrate this project?

[rms95]

Hi,

I am trying to integrate this package.

I have a checkout of the nlohmann json in:
vendor/json
and then I have a checkout of this archive in:
vendor/json-schema-validator

And I have this CMakeListst.txt:

cmake_minimum_required (VERSION 2.8.11)
project(json_schema_test)

# Add the schema
add_subdirectory(vendor/json)
add_subdirectory(vendor/json-schema-validator)

# Add executable
add_executable(schema-test main.cpp)

# Add the library
target_link_libraries (schema-test PRIVATE nlohmann_json::nlohmann_json_schema_validator)

However, this results in:

CMake Warning (dev) at CMakeLists.txt:2 (project):
  Policy CMP0048 is not set: project() command manages VERSION variables.
  Run "cmake --help-policy CMP0048" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  The following variable(s) would be set to empty:

    CMAKE_PROJECT_VERSION
    CMAKE_PROJECT_VERSION_MAJOR
    CMAKE_PROJECT_VERSION_MINOR
    CMAKE_PROJECT_VERSION_PATCH
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Using the multi-header code from /mnt/c/project/nlohmann/vendor/json/include/
-- Configuring done
CMake Warning (dev) at CMakeLists.txt:9 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "schema-test" links to target
  "nlohmann_json::nlohmann_json_schema_validator" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error: install(EXPORT "nlohmann_json_schema_validatorTargets" ...) includes target "nlohmann_json_schema_validator" which requires target "nlohmann_json" that is not in any export set.
-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.

What am I missing?

[Kikadass]

I believe the target is only nlohmann_json_schema_validator