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Yukihiro "Matz" Matsumoto
67f137e201
A gem can declare
spec.hal_pattern = /\Ahal-.*-task\z/
to indicate that another gem whose name matches the pattern (and
which depends on this gem for headers) replaces the built-in
ports/<conf.ports>/ HAL implementation. After all gems are set
up, List#resolve_external_hal! drops the target's ports/* objs
from its object list so the matching gem supplies the HAL
symbols. Two or more matches is reported as a build error.
This restores the pre-be6413f0d8 ability to maintain an
out-of-tree HAL via add_dependency + naming convention, without
reintroducing the "HAL information scattered across gems"
problem: the parent gem still owns the scheduler, headers, and
bundled posix/win ports; external HAL gems are an explicit,
opt-in override.
Declare /\Ahal-.*-task\z/ for mruby-task -- the same naming
pattern used before be6413f0d8.
ref #6825
Co-authored-by: Claude <noreply@anthropic.com>