add cmake

[oathdruid]

No description provided.

[coveralls]

coverage: 82.964% (+0.5%) from 82.486%
when pulling da9c8b5 on 5-feat-support-cmake
into bb29d9b on main.

[zhyncs]

There are some issues with the current implementation.

# env
g++ (GCC) 10.2.1 20210130 (Red Hat 10.2.1-11)
cmake version 3.29.0

# build
mkdir bld && cd bld && cmake .. -DBUILD_DEPS=ON

# failure log
CMake Error at cmake/babylon-deps.cmake:9 (find_package):
  Could not find a package configuration file provided by "absl" with any of
  the following names:

    abslConfig.cmake
    absl-config.cmake

  Add the installation prefix of "absl" to CMAKE_PREFIX_PATH or set
  "absl_DIR" to a directory containing one of the above files.  If "absl"
  provides a separate development package or SDK, be sure it has been
  installed.
Call Stack (most recent call first):
  CMakeLists.txt:8 (include)

I have already added the parameter -DBUILD_DEPS=ON
https://stackoverflow.com/questions/69748915/could-not-find-a-package-configuration-file-provided-by-absl-with-any-of-the-f

[oathdruid]

do you expect CMake use FetchContent to download dependencies automatically? this CMakeList.txt try to support this scenes

1. manually install pre-built abseil-cpp/boost/protobuf from package system like apt or yum
2. or, manually built them from source and install them to default place or specify in CMAKE_PREFIX_PATH
3. or, add them along with babylon use add_subdirectory

[zhyncs]

do you expect CMake use FetchContent to download dependencies automatically?

Yep. I think maybe it's friendly for users.

[zhyncs]

I have used on CUTLASS before, as follows:

include(FetchContent)

FetchContent_Declare(
  repo-cutlass
  GIT_REPOSITORY https://github.com/NVIDIA/cutlass.git
  GIT_TAG        6f47420213f757831fae65c686aa471749fa8d60
  GIT_SHALLOW ON
)

set(CUTLASS_ENABLE_HEADERS_ONLY ON CACHE BOOL "Enable only the header library")

FetchContent_MakeAvailable(repo-cutlass)

Maybe it can be used as a reference.

[oathdruid]

@zhyncs try this new commit. I also add a new CI pipeline do demonstrate this basic usage
https://github.com/baidu/babylon/actions/runs/9032823762/job/24821774034

[zhyncs]

@zhyncs try this new commit. I also add a new CI pipeline do demonstrate this basic usage https://github.com/baidu/babylon/actions/runs/9032823762/job/24821774034

Thanks very much, it is currently usable!

[zhyncs]

--test-dir build -> ctest --test-dir build

[oathdruid]

fixed