Commits on Sep 28, 2024

1. zlib-ng: add …

   Based on zlib.wrap and zlib-ng's CMake build.
   
   The wrap omits these upstream features:
   
   - Support for building without optimizations (WITH_OPTIM=OFF), with
     -march=native (WITH_NATIVE_INSTRUCTIONS=ON), without new strategies,
     without runtime CPU detection, or with reduced memory requirements
   - Support for building as C99
   - Configurable API function name prefix
   - Forcible override of optimization levels greater than 2, enablement of
     -fno-semantic-interposition, and use of software floating point on
     32-bit ARM.  It's not the build system's job to override the user's
     settings.  We do forcibly disable LTO to prevent it potentially merging
     blocks built for different CPU subarches.  (GCC, at least, won't do that
     in any case.)
   - Defining HAVE_SYMVER (optional, and currently a no-op)
   - Defining ZLIB_DEBUG in debug builds.  Wrap users probably don't want
     this.
   - Naming the static build "zlibstatic" on Windows
   - Maintainer warnings
   - Sanitizers, fuzzers, benchmarks, coverage, and most tests
   
   Also, the exact build logic differs from upstream in a number of small
   details.
   
   The wrap always uses the dependency name "zlib-ng", even when building in
   zlib-compat mode.  Meson will not allow zlib and zlib-ng to share the
   dependency name "zlib" within WrapDB.  Parent projects can invoke
   meson.override_dependency('zlib', ...) if desired.

   

   bgilbert committed Sep 28, 2024
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