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6481b34e23
Add a way to compile third-party libraries from source instead of downloading prebuilt ones. Each library source code is downloaded with git into a submodule at configure time, in response to the find_package(library_name) CMake call, except for OpenSSL where the official source archive is used. Each submodule is attached to a release tag on its own upstream repository. All the libraries are built using CMake directly, except for OpenSSL which uses a formula system, which permits to build libraries with a separate build system when there's no easy way to integrate it directly with CMake. This new dependency system determines which library is fetched from where using the concept of "layers". Currently we have three of them: source, formula, facebook, where the last layer represents the pre-built libraries. The provided order will be used when looking for libraries. A system to patch submodule source code has been added and it's currently used with googletest, libudev and util-linux. Patches should be put under libraries/cmake/source/<library name>/patches/<submodule>, where <submodule> is often one and is "src", but in other cases, like AWS, there are multiple with a more specific name. If for whatever reason the submodule cloning or the patching fails, the submodule has to be unregistered and its folder should be cleared. This should be achievable with "git submodule deinit -f <submodule path>" Following some other changes on existing functionality: - Changed the CMake variable BUILD_TESTING to OSQUERY_BUILD_TESTS to avoid enabling tests on third party libraries. Due to an issue with glog the BUILD_TESTING variable will be always forced to OFF. - Moved compiler and linker flags to their own file cmake/flags.cmake - Moved all the third-party CMakeLists.txt used for pre-built libraries under libraries/cmake/facebook - Added the --exclude-folders option to tools/format-check.py and tools/git-clang-format.py, so that it's possible to ignore any third party library source code. - The format and format_check target use the new --exclude-folders option to exclude libraries/cmake/source from formatting. - The test and osquery binaries are properly compiled with PIE (osquery/osquery#5611) Co-authored-by: Stefano Bonicatti <stefano.bonicatti@gmail.com> Co-authored-by: Teddy Reed <teddy@casualhacking.io> |
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| events_stream | ||
| tracing | ||
| CMakeLists.txt | ||
| README.md | ||
Here be dragons
Disclaimer
The code in this directory is only for experimental purposes. It could be unreliable or unstable, could be not well tested or could fail. There is no guarantee about the future of the code here, it wether could be removed or utterly changed. It exists here for the beta testing purposes or discussions. Should something from here be used in the non-experimental code it will be moved outside of experimental directory.