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C dependencies

Third-party dependencies

Managed in third-party directory as standalone cmake project, install to specific directory before top CMakeLists.txt able to find dependencies. We'll skipped pre-compiled third-party binary for specific OSs only: centos 7, ubuntu 20.04, macos >= 12. So the three OSs listed above archive a faster build time, otherwise, a build for third-party dependencies is necessary at first time.

Vendored (inlined) dependencies

Included the dependency source code directly in contrib directory, It depends to include target dependency as git submodule or include source code directly for each dependency respectively, for example by source file number, upstream status. Discussion may necessary.

Dependencies policy

• Consider full-offline building, avoid cmake FetchContent module in case download dependency at configure time