CMake not correctly finding the configuration package for 3.7.0

[jelizaga3-gatech]

Describe the bug
cmake find-package is not correctly finding the nlohmann_json package installed from vcpkg

Environment

• OS: Windows 10
• Compiler: Clang I think, on a Windows 10 machine x64

The Clang file was located here, I used VS + CMake:
C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe

To Reproduce
Steps to reproduce the behavior:

1. Run vcpkg search nlohmann-json
   Response: vcpkg-2019.07>vcpkg search nlohmann-json

   nlohmann-json 3.7.0 JSON for Modern C++

1a. Install vcpkg. vcpkg.exe install nlohmann-json

2. vcpkg installs to vcpkg-2019.07\packages\nlohmann-json_x86-windows

3. Use find_package in CMakeLists.txt in project

    # CMakeLists.txt
   set(nlohmann_json_DIR ${PROJECT_SOURCE_DIR}/../vcpkg-2019.07/packages/nlohmann- 
   json_x86-windows/share/nlohmann_json)
   find_package(nlohmann_json 3.7.0 REQUIRED)
   

Expected behavior
CMake finds package.

Failure logs

1> CMake Error at ${PROJECT_SOURCE_DIR}\CMakeLists.txt:17 (find_package):
1>   Could not find a configuration file for package "nlohmann_json" that is
1>   compatible with requested version "3.7.0".
1> 
1>   The following configuration files were considered but not accepted:
1> 
1>     ${PROJECT_SOURCE_DIR}/../vcpkg-2019.07/packages/nlohmann-json_x86-windows/share/nlohmann_json/nlohmann_jsonConfig.cmake, version: 3.7.0 (32bit)

Additional context
Link to release:
Released version 3.7.0 - https://github.com/nlohmann/json/tree/v3.7.0

Referenced here: nlohmann/json#1721 was told to create a ticket here.

[JackBoosY]

Hi @jelizaga3-gatech, you need to run .\vcpkg.exe integrate install and add -DCMAKE_TOOLCHAIN_FILE=YOUR_VCPKG_PATH/scripts/buildsystems/vcpkg.cmake to the cmake parameter.

See documentation.

Thanks.

[JackBoosY]

Does this issue still bother you?

[SeanOMik]

No, it was a while ago but I remember that it kind of just fixed itself after I removed the find_package. And it somehow did link with it just the find_package was the thing that broke it for some reason.

[JackBoosY]

If this issue is still not resolved, please reopen it.