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Document the Meson options and check them in CI

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Describe the options of meson.build in FILES.md and in the Meson section
of the package manager documentation, which so far said that a Meson
installation always uses the default configuration.

The ci_meson_install job now also installs with non-default options and
checks that the headers of the multi-header version are installed, that
the definitions reach the pkg-config file and the CMake target, and that
find_package still works.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-27 14:51:27 +02:00
parent 2790175d79
commit 71b4eaf743
3 changed files with 31 additions and 6 deletions
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FILES.md
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@@ -277,9 +277,12 @@ meson setup builddir
ninja -C builddir
```
The build definition for the [Meson](https://mesonbuild.com) build system. When installing, it also installs the CMake package config
files so that `find_package(nlohmann_json)` works. As Meson cannot generate `nlohmann_jsonTargets.cmake` itself, it is
created from the template `cmake/nlohmann_jsonTargets.cmake.in`, which is only used by Meson.
`meson_options.txt` defines the options, which mirror the CMake options that change the library's target (for example,
`-DDiagnostics=true`). Meson requires this file next to `meson.build`, so it is also part of `include.zip`.
When installing, `meson.build` installs the headers, a pkg-config file, and the CMake package config files, so that
`find_package(nlohmann_json)` works. As Meson cannot generate `nlohmann_jsonTargets.cmake` itself, it is created from
the template `cmake/nlohmann_jsonTargets.cmake.in`, which is only used by Meson.
### `Package.swift`