- Update to 0.17.3:
  * Fix 0.17.2 regression in the fontconfig fontprovider leading to
    undesirable widths being chosen from large typographic families
  * Fix configure generated with slibtool-provided autoconf macros
  * Fix make check for shared-only builds
  * Constify some API parameters in a backwards-compatible manner
  * Add new ass_malloc and ass_free API functions
  * Tweak default optimization flags
  * Speed up parsing of events with very long override blocks
  * Improve handling of HarfBuzz-related failures
- reintroduce 'make check' as the issue has been fixed upstream
- Update to 0.17.2:
  * This release brings optimized assembly routines for aarch64,
    as well as numerous individual improvements and fixes.
  * Detailed Changes:
    - Fix rendering of \h in certain cases
    - Fix a minor memory leak in the CoreText and DirectWrite font provider
    - Fix wrong ASS_Image dimensions for huge BorderStyle=4 backgrounds
      potentially leading to out of bound reads by API users
    - Improve quality of animated rectangular clips
    - Improve accuracy of cache limits
    - Full-Unicode cmaps are now always preferred
    - Improve font selection compatibility in the DirectWrite font provider
    - Improved documentation
    - Updating selective overrides now forces a cache clear to avoid issues
      with outdated caches
    - Frame and storage resolutions are now limited to what a single ASS_Image
      can represent
    - make check now runs checkasm if assembly is enabled
    - CoreText can now be used on Mac OS X 10.5
    - Meson/muon is now offered as a secondary build system bringing back
      first-party MSVC support
    - Note however it is not at feature parity with autotools in all cases
    - aarch64: add optimized assembly routines covering the same set as on x86;
      they work on both little and big endian systems
    - x86: add SSSE3 versions of some assembly routines to help CPUs without
      AVX2
    - x86: it is now possible to build binaries with optimized assembly an
      SHSTK support
    - Improve VSFilter compatibility
- 'make check' is broken for --disable-static builds because checkasm needs to
  access symbols that aren't part of the public API, so just disable it.
- Require libunibreak during build for better linebreaking of
  unicode text.

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