Replace dpkg-checkbuilddeps with a native implementation:
- full dependency grammar: comma clauses, | alternatives, << <= = >= >>
relations, :arch qualifiers (any/native/specific), [arch lists] and
<profile restriction> formulas per alternative;
- restriction reduction against active build profiles and the host arch
at parse time (reduce_restrictions semantics);
- evaluation against a parsed dpkg status database with Multi-Arch
semantics (foreign/allowed) and versioned Provides rules (unversioned
provides never satisfy versioned deps; versioned ones must satisfy the
relation);
- clause simplification with implication-based deduplication, rendering
dpkg-compatible 'unmet build dependencies/conflicts' diagnostics.
check_build_depends() consumes debian/control + CheckOpts (-A/-B/-I
equivalents). run_source_build performs the check when forced (-D
parity); source-only builds skip it entirely like dpkg-buildpackage,
and unsatisfied deps propagate as UnmetBuildDependencies -> exit 3.
Unit tests port the Dpkg_Deps.t reduction matrices; differential gate
runs 24 scenarios (alternatives, versions, arch/profile restrictions,
Multi-Arch, Provides, conflicts, -A/-B flags) against real
dpkg-checkbuilddeps comparing exit status and diagnostics.
vhaudiquet
dfaab0606a