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Complete the Meson options and match CMake's compile definitions

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Finish the Meson changes from #4452:

- Offer all eight options that change the CMake target, named like the
  CMake options without the JSON_ prefix. MultipleHeaders defaults to
  false so that existing Meson users keep the single header.
- Add a compile definition only for an option that differs from its
  default, exactly as target_compile_definitions does. Before, the
  GlobalUDLs and ImplicitConversions definitions were inverted and were
  also added in the default configuration.
- Keep the nlohmann_json_multiple_headers dependency that earlier
  versions of meson.build provided.
- Put the definitions into the pkg-config file and the Meson-generated
  nlohmann_jsonTargets.cmake, and install the pkg-config file into
  <datadir>/pkgconfig like CMake does.
- Ship meson_options.txt in include.zip, since meson.build now reads
  options and the zip is documented as a Meson subproject.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-27 14:50:10 +02:00
parent 8d6d1264a7
commit cc9fafa0e1
4 changed files with 82 additions and 11 deletions
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@@ -213,7 +213,7 @@ json.tar.xz:
# We use `-X` to make the resulting ZIP file reproducible, see
# <https://content.pivotal.io/blog/barriers-to-deterministic-reproducible-zip-files>.
include.zip: BUILD.bazel
zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) BUILD.bazel MODULE.bazel meson.build LICENSE.MIT
zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) BUILD.bazel MODULE.bazel meson.build meson_options.txt LICENSE.MIT
# Create the files for a release and add signatures and hashes.
release: include.zip json.tar.xz