xkbcommon

BCR packaging summary for libxkbcommon.

Public targets:

• @xkbcommon
• @xkbcommon//:xkbcommon_headers

Packaging notes:

• This initial BCR package only exposes the core libxkbcommon library.
• config.h is generated from a checked-in template with fixed upstream-style defaults plus a small set of libc/toolchain probes from rules_cc_autoconf.
• src/xkbcomp/parser.y is generated with rules_bison.
• The module also pins rules_m4 to a Bazel 9-compatible version because rules_bison pulls it transitively.
• Internal src/**/*.h headers and generated headers are kept private to the implementation.
• The packaged library sources are multi-license permissive code (MIT, MIT-open-group, HPND, HPND-sell-variant, and DEC-3-Clause) as documented by the upstream consolidated LICENSE file exported by this package.

Limitations:

• xkbcommon-x11 is not packaged in this version.
• xkbregistry is not packaged in this version.
• CLI tools and Wayland helpers are not packaged in this version.
• Runtime keymap and locale discovery still depends on host XKB and X locale data paths when those code paths are used.
• The generated config.h is intentionally smaller than upstream Meson's full configuration surface.

Presubmit:

• Builds and tests @xkbcommon//:xkbcommon_headers_consumer_compile_test, @xkbcommon//:xkbcommon_consumer_link_test, and @xkbcommon//:xkbcommon_compose_from_buffer_test.
• The header compile test covers the full exported public header surface.
• The compose smoke test is hermetic and uses an in-memory compose table instead of host locale/X11 data.