CMake: How to include the headers of an external library downloaded with FetchContent?

• eigen

  19 - -

cmake_minimum_required(VERSION 3.15) project(app) include(FetchContent) FetchContent_Declare(Eigen3 URL https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz) FetchContent_MakeAvailable(Eigen3) add_executable(app main.cpp) target_link_libraries(app Eigen3::Eigen)

• cmake-init

  164 1,812 8.1 CMake

  The missing CMake project initializer

Use a package manager such as Conan or vcpkg. You can check cmake-init to see how to integrate them in an idiomatic fashion.

• InfluxDB

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• json

  93 40,239 7.7 C++

  JSON for Modern C++

Thank you for your suggestion. I decided to use URL because it was recommended in another repository (not Eigen's). Search for "It is recommended to use the URL approach described above" here. Does it make sense? I assume that downloads are faster this way.

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