Support for CMake

[AndreyAlifanov]

Normal support for using library clickhouse-cpp with CMake and vcpkg added. Also some errors fixed.

Current usage of library in projects requires writing many lines of code, sush as
find_library, find_package, include_directories, target_link_libraries for all dependencies.
It's very annoying and error prune.

find_library(CLICKHOUSE_CPP libclickhouse-cpp-lib.a REQUIRED)
find_package(zstd CONFIG REQUIRED)
find_package(lz4 CONFIG REQUIRED)
find_package(cityhash CONFIG REQUIRED)
find_package(abseil CONFIG REQUIRED)

target_link_libraries(${PROJECT_NAME}
  PRIVATE
    ${CLICKHOUSE_CPP}
    zstd::libzstd_static
    lz4::lz4
    cityhash
    abseil
)

With my corrections all we need is:

find_package(clickhouse-cpp CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE clickhouse-cpp-lib)

[Enmk]

Hi @AndreyAlifanov all CI jobs have failed, could you please take a look?

[AndreyAlifanov]

Hi @AndreyAlifanov all CI jobs have failed, could you please take a look?

Hi @Enmk thank you for information. All CI jobs failed with the same errors. I'll investigate reasons.

[AndreyAlifanov]

Hi @Enmk hope I fixed build. My local builds are successful with and without WITH_SYSTEM_xxx.

[IyeOnline]

Hi, I'd like to ask what the status of this is.

I'm currently working on integrating with clickhouse (tenzir/tenzir#5032) and would prefer to "properly" install clickhouse-cpp using this PR.

[AndreyAlifanov]

Hi, @Enmk .

I want to know: why this PR hangs? What reasons prevent merge into main repository?