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json/tests/cmake_fetch_content/project/CMakeLists.txt

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Accept NEW CMake policies up to CMake 3.14 (#4112) Starting with CMake 3.27, deprecation warnings are issued when asking for policy settings for CMake 3.4 or earlier. The cmake_minimum_required() command accepts a version range, which allows NEW policy settings up to the upper end of that range to be used, but without raising the minimum CMake version above the bottom of that range. This means NEW policy settings will be used where available, without requiring them. This change updates the project's cmake_minimum_required() calls to use a version range to extend the upper policy version to 3.14 where it wasn't already at that version or higher. This prevents the deprecation warning from CMake 3.27, and gives breathing space before a future CMake release will start issuing similar deprecation warnings again.
2023-09-25 09:31:26 +02:00
cmake_minimum_required(VERSION 3.11...3.14)
Add CMake fetchcontent documentation and tests Github issue: https://github.com/nlohmann/json/issues/2073 nlohmann::json documents 2 way of depending on it using CMake 1) Copy-paste the project/source into your own project. 2) Install nlohman::json and then use find_package. (1) pollutes your git repository, (2) requires everyone to install the dependencies themselves. Since 2018, CMake provide some kind of 'package manager' features using [FetchContent](https://cmake.org/cmake/help/v3.17/module/FetchContent.html) It gives the following: ~~~cmake include(FetchContent) FetchContent_Declare(json GIT_REPOSITORY https://github.com/nlohmann/json GIT_TAG v3.7.3) FetchContent_GetProperties(json) if(NOT json_POPULATED) FetchContent_Populate(json) add_subdirectory( ${json_SOURCE_DIR} ${json_BINARY_DIR} EXCLUDE_FROM_ALL) endif() ~~~ Then declares the dependency in the target using it: ~~~cmake target_link_library(my_project PRIVATE nlohmann_json::nlohmann_json ~~~ This patch updates the documentation and provides tests.
2020-04-29 14:29:17 +02:00
project(DummyImport CXX)
include(FetchContent)
:wrench: overwork CMake files
2020-06-16 20:23:01 +02:00
get_filename_component(GIT_REPOSITORY_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/../../.. ABSOLUTE)
FetchContent_Declare(json GIT_REPOSITORY ${GIT_REPOSITORY_DIRECTORY} GIT_TAG HEAD)
Add CMake fetchcontent documentation and tests Github issue: https://github.com/nlohmann/json/issues/2073 nlohmann::json documents 2 way of depending on it using CMake 1) Copy-paste the project/source into your own project. 2) Install nlohman::json and then use find_package. (1) pollutes your git repository, (2) requires everyone to install the dependencies themselves. Since 2018, CMake provide some kind of 'package manager' features using [FetchContent](https://cmake.org/cmake/help/v3.17/module/FetchContent.html) It gives the following: ~~~cmake include(FetchContent) FetchContent_Declare(json GIT_REPOSITORY https://github.com/nlohmann/json GIT_TAG v3.7.3) FetchContent_GetProperties(json) if(NOT json_POPULATED) FetchContent_Populate(json) add_subdirectory( ${json_SOURCE_DIR} ${json_BINARY_DIR} EXCLUDE_FROM_ALL) endif() ~~~ Then declares the dependency in the target using it: ~~~cmake target_link_library(my_project PRIVATE nlohmann_json::nlohmann_json ~~~ This patch updates the documentation and provides tests.
2020-04-29 14:29:17 +02:00
FetchContent_GetProperties(json)
if(NOT json_POPULATED)
FetchContent_Populate(json)
add_subdirectory(${json_SOURCE_DIR} ${json_BINARY_DIR} EXCLUDE_FROM_ALL)
endif()
add_executable(with_namespace_target main.cpp)
target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
add_executable(without_namespace_target main.cpp)
target_link_libraries(without_namespace_target nlohmann_json)
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