Amalgamated files include HAL gem source code selected at build time,
making them platform-specific. Document this as expected behavior.
Ref #6726.
Co-authored-by: Claude <noreply@anthropic.com>
Gems like mruby-task add preprocessor defines (MRB_USE_TASK_SCHEDULER)
that affect mrb_state structure. The amalgamation generator now detects
these defines from the build configuration and adds them at the top of
mruby.h before struct definitions are encountered.
Supported define patterns: MRB_USE_*, MRB_UTF8_*, HAVE_MRUBY_*
Co-authored-by: Claude <noreply@anthropic.com>
Yukihiro "Matz" Matsumoto