mirror of
https://github.com/nlohmann/json.git
synced 2026-11-15 20:08:03 +00:00
Niels Lohmann
7127a82fa1
* Use CMake 4.5's stable import std support in the module test CMake 4.5 makes `import std` available to every target that scans for C++ modules and drops the experimental CMAKE_EXPERIMENTAL_CXX_IMPORT_STD gate and the CXX_MODULE_STD property. The module test no longer needs the version-specific opt-in token, so the ci_module_cpp20 jobs no longer have to pin CMake 4.3.4 and now request CMake ^4.5.0. The modules, CMake and README documentation now list the CMake, generator and toolchain requirements for building the module and for `import std;`. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Bump lukka/get-cmake from 4.4.5 to 4.5.0 get-cmake 4.4.5 does not know CMake 4.5.0, so the ci_module_cpp20 jobs that request '^4.5.0' failed in the setup step. Bump every pin so all jobs use the same action version. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Install unzip in the Clang module job before get-cmake The ^4.5.0 CMake/Ninja cache key is new, so get-cmake has to unzip the Ninja download, and silkeh/clang:latest has no unzip. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Disable C++ module scanning for the unit tests With CMake 4.5, every target that scans for C++ modules gets a synthesized std module target. For the C++20 and newer unit-test targets, this compiled libstdc++'s std.cc with the -Werror test flags and failed to configure with libc++ images that lack std.compat.cppm. The unit tests use no modules, so turn scanning off; the module test is a separate project. Signed-off-by: Niels Lohmann <mail@nlohmann.me> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me>
23 lines
705 B
CMake
23 lines
705 B
CMake
# `import std;` (used by main.cpp) is supported without experimental opt-in
|
|
# since CMake 4.5: it is available to every target that scans for C++ modules.
|
|
cmake_minimum_required(VERSION 4.5)
|
|
|
|
project(json_test CXX)
|
|
|
|
# import std; requires C++23 and the std library module
|
|
set(CMAKE_CXX_STANDARD 23)
|
|
set(CMAKE_CXX_STANDARD_REQUIRED ON)
|
|
set(CMAKE_CXX_EXTENSIONS OFF)
|
|
|
|
set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann.json module support")
|
|
|
|
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../.. ${CMAKE_CURRENT_BINARY_DIR}/tests)
|
|
|
|
add_executable(json_test main.cpp)
|
|
target_link_libraries(json_test
|
|
PRIVATE
|
|
nlohmann_json_modules
|
|
)
|
|
|
|
target_compile_features(json_test PRIVATE cxx_std_23)
|