c1f14b5c78
`external 'c' name 'strlen'` now records the bare library name on the declaration (TMethodDecl.ExternalLib) and hoists it into the owning unit/program's LinkLibs set, so the link layer can expand it to a -l<name> dependency. The library clause is optional and parsed before the existing `name '...'` clause, so `external name 'x'` and bare `external 'c'` both still parse. TUnitInterface.LinkLibs is serialised in the .bif META block (one EncodeStringList after ImplUsedUnits, before HasInitialization) so a unit's external-library dependencies round-trip across separate compilation. IFACE_VERSION is bumped 6 -> 7: the META layout grew, so a v6 reader must reject these .bif and recompile (without the bump a v6 binary would misparse the extra field and read past the END marker). Tests: a parser test asserting `external 'c' name 'strlen'` populates ExternalLib + the program's LinkLibs; a .bif round-trip test for TUnitInterface.LinkLibs; the magic/version assertion updated to v7; and the existing e2e strlen case. bif-coverage.status records TUnitInterface.LinkLibs as serialised. |
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