Recommend using Ninja to build fcitx5-mcbopomofo

[xatier]

I wonder if we would like to recommend using ninja to build the project.

To enable ninja, simply add -G Ninja to the CMake command.

cmake ../ -G Ninja -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DENABLE_CLANG_TIDY=On
cmake --build .
# or just `ninja`

I observed a ~2x boost on my system ( Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz)

# ninja uses $(nproc) +2 jobs by default
$ nproc 
16

$ time ninja
[40/40] Linking CXX shared module src/mcbopomofo.so

real    0m22.833s
user    2m46.923s
sys     0m4.956s

$ time make -j 18
...
[100%] Built target mcbopomofo

real    0m48.043s
user    2m9.943s
sys     0m4.526s

[xatier]

One can create CMakeUserPresets.json file with cmake presets

CMakeUserPresets.json:

{
    "version": 8,
    "cmakeMinimumRequired": {
        "major": 3,
        "minor": 28,
        "patch": 0
    },
    "configurePresets": [
        {
            "name": "release",
            "displayName": "Release",
            "description": "Release build with Ninja",
            "generator": "Ninja",
            "binaryDir": "${sourceDir}/build/",
            "cacheVariables": {
                "CMAKE_INSTALL_PREFIX": "/usr",
                "CMAKE_BUILD_TYPE": "Release",
                "ENABLE_CLANG_TIDY": "On"
            }
        },
        {
            "name": "debug",
            "displayName": "Debug",
            "description": "Debug build with Ninja",
            "generator": "Ninja",
            "binaryDir": "${sourceDir}/build/",
            "cacheVariables": {
                "CMAKE_INSTALL_PREFIX": "/usr",
                "CMAKE_BUILD_TYPE": "Debug",
                "ENABLE_CLANG_TIDY": "On"
            }
        }
    ]
}

This will simplify the commands for developers:

$ cmake ../ --preset release
$ ninja

$ cmake ../ --preset debug
ninja && ninja test