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@ -167,17 +167,14 @@ Precise query execution timings are not recorded and not compared due to high va
## Build Tests {#build-tests}
Build tests allow to check that build is not broken on various alternative configurations and on some foreign systems. Tests are located at `ci` directory. They run build from source inside Docker, Vagrant, and sometimes with `qemu-user-static` inside Docker. These tests are under development and test runs are not automated.
Build tests allow to check that build is not broken on various alternative configurations and on some foreign systems. These tests are automated as well.
Motivation:
Normally we release and run all tests on a single variant of ClickHouse build. But there are alternative build variants that are not thoroughly tested. Examples:
- build on FreeBSD
- build on Debian with libraries from system packages
- build with shared linking of libraries
- build on AArch64 platform
- build on PowerPc platform
Examples:
- cross-compile for Darwin x86_64 (Mac OS X)
- cross-compile for FreeBSD x86_64
- cross-compile for Linux AArch64
- build on Ubuntu with libraries from system packages (discouraged)
- build with shared linking of libraries (discouraged)
For example, build with system packages is bad practice, because we cannot guarantee what exact version of packages a system will have. But this is really needed by Debian maintainers. For this reason we at least have to support this variant of build. Another example: shared linking is a common source of trouble, but it is needed for some enthusiasts.