enhance: improve dependency source resolution

[suxiaogang223]

Summary

• Disable SYSTEM resolution for Arrow and ORC while paimon-cpp depends on project-specific patches.
• Make AUTO resolution for Arrow and ORC fall back to bundled builds.
• Add shared helper logic for validating that imported CMake targets expose required headers.
• Apply system dependency header validation to GTest and other FindXXXAlt config-package paths.

Why

Arrow and ORC currently carry project-specific patches in paimon-cpp, so resolving them from system packages can miss required behavior. Some system dependency config packages can also expose library targets without the corresponding development headers, which lets configure pass and build fail later.

Validation

• cmake -S . -B build/codex-deps-check -DPAIMON_BUILD_TESTS=OFF -DPAIMON_ENABLE_ORC=OFF -DPAIMON_DEPENDENCY_SOURCE=BUNDLED
• cmake -S . -B build/codex-auto-check -DPAIMON_BUILD_TESTS=OFF -DPAIMON_ENABLE_ORC=OFF
• cmake -S . -B build/codex-arrow-system-check -DArrow_SOURCE=SYSTEM -DPAIMON_ENABLE_ORC=OFF fails as expected.
• cmake -S . -B build/codex-gtest-system-check -DPAIMON_BUILD_TESTS=ON -DPAIMON_ENABLE_ORC=ON -DPAIMON_DEPENDENCY_SOURCE=BUNDLED -DGTest_SOURCE=SYSTEM fails at configure time when the full GTest development package is unavailable.

[Copilot]

Pull request overview

This PR tightens third-party dependency resolution in the CMake toolchain to avoid inadvertently using unpatched system Arrow/ORC and to fail fast when “system” config packages expose library targets without usable development headers.

Changes:

• Disallow Arrow_SOURCE=SYSTEM / ORC_SOURCE=SYSTEM and force AUTO to resolve to bundled builds for Arrow and ORC.
• Add a shared paimon_find_target_headers() helper to validate headers for imported CMake targets.
• Apply the header-validation logic across multiple Find*Alt.cmake modules (including the config-package paths for GTest and others).

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
cmake_modules/ThirdpartyToolchain.cmake	Forces Arrow/ORC to bundled (AUTO→BUNDLED) and errors out on SYSTEM for patched deps.
cmake_modules/DefineOptions.cmake	Updates Arrow/ORC option enums/descriptions to reflect SYSTEM being unsupported.
cmake_modules/FindPackageUtils.cmake	Adds shared helper to locate/validate headers associated with imported targets.
cmake_modules/FindzstdAlt.cmake	Validates headers for config targets before accepting system zstd.
cmake_modules/FindZLIBAlt.cmake	Validates headers for ZLIB::ZLIB config-package target paths.
cmake_modules/FindTBBAlt.cmake	Validates headers for TBB config targets before accepting system TBB.
cmake_modules/FindSnappyAlt.cmake	Validates headers for Snappy config targets before accepting system Snappy.
cmake_modules/FindLZ4Alt.cmake	Validates headers for LZ4 config targets before accepting system LZ4.
cmake_modules/FindRE2Alt.cmake	Validates headers for re2 config targets before accepting system RE2.
cmake_modules/FindRapidJSONAlt.cmake	Validates headers for RapidJSON config targets before accepting system RapidJSON.
cmake_modules/FindProtobufAlt.cmake	Requires protobuf headers + protoc when using config-package targets.
cmake_modules/FindGTestAlt.cmake	Adds config-package header validation for gtest/gmock targets.
cmake_modules/FindglogAlt.cmake	Validates headers for glog config targets before accepting system glog.
cmake_modules/FindfmtAlt.cmake	Validates headers for fmt config targets before accepting system fmt.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[zjw1111]

+1

[zjw1111]

Thanks for enhancing the dependency build module. Great work! 👍🏻