[mlir][python] Add a warning for cmake version < 3.15.

As discussed on discord, we have never actually been able to build with the project-wide published min version of 3.14.3. The buildbot that tests the Python configuration is currently pinned to 3.19.1, and there are a number of non-version/policy controlled features that Python building relies on that makes it unreliable with older versions. Some of the issues are pretty fundamental and I don't know how to do them on the older version. I think that, as an optional feature, at least advertising the PSA as in this patch is a good middle ground until the next project-wide CMake version bump.

Also moves setup logic to a macro so that everyone can use it.
This commit is contained in:
Stella Laurenzo 2021-10-12 19:32:48 -07:00
parent 84fae3bce8
commit 3d92722f74
2 changed files with 40 additions and 23 deletions

View File

@ -99,31 +99,9 @@ option(MLIR_INCLUDE_INTEGRATION_TESTS
set(MLIR_ENABLE_BINDINGS_PYTHON 0 CACHE BOOL
"Enables building of Python bindings.")
if(MLIR_ENABLE_BINDINGS_PYTHON)
include(MLIRDetectPythonEnv)
# After CMake 3.18, we are able to limit the scope of the search to just
# Development.Module. Searching for Development will fail in situations where
# the Python libraries are not available. When possible, limit to just
# Development.Module.
# See https://pybind11.readthedocs.io/en/stable/compiling.html#findpython-mode
if(CMAKE_VERSION VERSION_LESS "3.18.0")
set(_python_development_component Development)
else()
set(_python_development_component Development.Module)
endif()
find_package(Python3 ${LLVM_MINIMUM_PYTHON_VERSION}
COMPONENTS Interpreter ${_python_development_component} NumPy REQUIRED)
unset(_python_development_component)
message(STATUS "Found python include dirs: ${Python3_INCLUDE_DIRS}")
message(STATUS "Found python libraries: ${Python3_LIBRARIES}")
message(STATUS "Found numpy v${Python3_NumPy_VERSION}: ${Python3_NumPy_INCLUDE_DIRS}")
mlir_detect_pybind11_install()
find_package(pybind11 2.6 CONFIG REQUIRED)
message(STATUS "Found pybind11 v${pybind11_VERSION}: ${pybind11_INCLUDE_DIR}")
message(STATUS "Python prefix = '${PYTHON_MODULE_PREFIX}', "
"suffix = '${PYTHON_MODULE_SUFFIX}', "
"extension = '${PYTHON_MODULE_EXTENSION}")
mlir_configure_python_dev_packages()
endif()
include_directories( "include")

View File

@ -1,5 +1,44 @@
# Macros and functions related to detecting details of the Python environment.
# Finds and configures python packages needed to build MLIR Python bindings.
macro(mlir_configure_python_dev_packages)
if(CMAKE_VERSION VERSION_LESS "3.15.0")
message(SEND_ERROR
"Building MLIR Python bindings is known to rely on CMake features "
"that require at least version 3.15. Recommend upgrading to 3.18+ "
"for full support. Detected current version: ${CMAKE_VERSION}")
endif()
# After CMake 3.18, we are able to limit the scope of the search to just
# Development.Module. Searching for Development will fail in situations where
# the Python libraries are not available. When possible, limit to just
# Development.Module.
# See https://pybind11.readthedocs.io/en/stable/compiling.html#findpython-mode
if(CMAKE_VERSION VERSION_LESS "3.18.0")
message(WARNING
"This version of CMake is not compatible with statically built Python "
"installations. If Python fails to detect below this may apply to you. "
"Recommend upgrading to at least CMake 3.18. "
"Detected current version: ${CMAKE_VERSION}"
)
set(_python_development_component Development)
else()
set(_python_development_component Development.Module)
endif()
find_package(Python3 ${LLVM_MINIMUM_PYTHON_VERSION}
COMPONENTS Interpreter ${_python_development_component} NumPy REQUIRED)
unset(_python_development_component)
message(STATUS "Found python include dirs: ${Python3_INCLUDE_DIRS}")
message(STATUS "Found python libraries: ${Python3_LIBRARIES}")
message(STATUS "Found numpy v${Python3_NumPy_VERSION}: ${Python3_NumPy_INCLUDE_DIRS}")
mlir_detect_pybind11_install()
find_package(pybind11 2.6 CONFIG REQUIRED)
message(STATUS "Found pybind11 v${pybind11_VERSION}: ${pybind11_INCLUDE_DIR}")
message(STATUS "Python prefix = '${PYTHON_MODULE_PREFIX}', "
"suffix = '${PYTHON_MODULE_SUFFIX}', "
"extension = '${PYTHON_MODULE_EXTENSION}")
endmacro()
# Detects a pybind11 package installed in the current python environment
# and sets variables to allow it to be found. This allows pybind11 to be
# installed via pip, which typically yields a much more recent version than