[CMake] Link only what is used: drop unused explicit library deps#22669
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guitargeek wants to merge 1 commit into
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[CMake] Link only what is used: drop unused explicit library deps#22669guitargeek wants to merge 1 commit into
guitargeek wants to merge 1 commit into
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Address root-project#20731 by removing explicitly-linked-but-unused libraries reported by `ldd -u`. The recurring offenders all came from foundational libraries exporting internal-only dependencies through their PUBLIC link interface (CMake DEPENDENCIES), so every consumer inherited them. These are now PRIVATE (CMake LIBRARIES), and genuinely-spurious links dropped: * RIO: Thread -> `PRIVATE` (TFilePrefetch only holds a TThread* member) * Tree: Imt/Net/MathCore -> `PRIVATE`, declares its own Thread (RIO stays PUBLIC: TBufferSQL/TTreeCache derive from RIO types) * RHTTP/HistPainter/RooStats/RooFitMore/RCsg: internal deps -> PRIVATE * Hbook/Spectrum/HistFactory: spurious Matrix/Foam removed * ntuple_merger/stressRooFit tests: declare the deps they actually use RIO -> Thread alone cuts Thread over-linking from 62 reports to 2; in total the tree drops from 510 reports (77 libs) to 422 (69), and every library still links cleanly under `-Wl`, `--no-undefined`. This closes root-project#20731: the remaining reports are not over-linking and PUBLIC/PRIVATE cannot remove them. They are either inline-header dependencies (e.g. Tree using TMath: a real compile dependency with no exported symbol, which `ldd -u` mis-flags) or deliberate public API (Hist exposes TVectorD/TMatrixD; TMessage derives from TBufferFile). Closes root-project#20731. 🤖 Done with the help of AI.
Test Results2 603 tests 2 603 ✅ 1h 9m 49s ⏱️ Results for commit ff35da8. |
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Address #20731 by removing explicitly-linked-but-unused libraries reported by
ldd -u. The recurring offenders all came from foundational libraries exporting internal-only dependencies through their PUBLIC link interface (CMake DEPENDENCIES), so every consumer inherited them. These are now PRIVATE (CMake LIBRARIES), and genuinely-spurious links dropped:PRIVATE(TFilePrefetch only holds a TThread* member)PRIVATE, declares its own Thread(RIO stays PUBLIC: TBufferSQL/TTreeCache derive from RIO types)
RIO -> Thread alone cuts Thread over-linking from 62 reports to 2; in total the tree drops from 510 reports (77 libs) to 422 (69), and every library still links cleanly under
-Wl,--no-undefined.This closes #20731: the remaining reports are not over-linking and PUBLIC/PRIVATE cannot remove them. They are either inline-header dependencies (e.g. Tree using TMath: a real compile dependency with no exported symbol, which
ldd -umis-flags) or deliberate public API (Hist exposes TVectorD/TMatrixD; TMessage derives from TBufferFile).Closes #20731.
🤖 Done with the help of AI.