add mingw pattern to RUBY_PLATFORM check. native mingw builds were
falling through to windows hal because previous detection only worked
for cross-compilation. now checks RUBY_PLATFORM for mingw along with
linux/darwin/bsd.
Co-authored-by: Claude <noreply@anthropic.com>
mingw provides posix-compatible functions (readlink, symlink, opendir, etc.)
so it should use hal-posix-io/dir instead of hal-win-io/dir. detect mingw by
checking if host_target or compiler command contains "mingw". check posix
platforms first so mingw is caught before for_windows check.
this fixes test failures on mingw where readlink returned absolute paths
instead of relative paths, and symlink/socket tests failed due to api
differences between windows native apis and posix apis.
Co-authored-by: Claude <noreply@anthropic.com>
platform-specific directory operations separated into hal-posix-dir and
hal-win-dir gems. this allows mruby-dir to support embedded platforms and
simplifies platform-specific implementations.
Co-authored-by: Claude <noreply@anthropic.com>
Yukihiro "Matz" Matsumoto