CMakeLists.txt

# ======================================
# == ERYN project base configuration ==
# ======================================

# TODO:
#  - check cmake_minimum_required range
#  - check if project-specific CMake function are needed

# ---- CMake related definitions ----
cmake_minimum_required(VERSION 3.23...3.31)

# ---- Main project definition ----
project(eryn VERSION ${SKBUILD_PROJECT_VERSION})
message(STATUS "The value of SKBUILD_PROJECT_VERSION is: ${SKBUILD_PROJECT_VERSION}")

# ---- Find required dependencies ----
find_package(Python COMPONENTS Interpreter Development.Module NumPy REQUIRED)

# ---- Define project specific options ----

# ERYN_WITH_GPU controls the activation of both GPU and CPU backend compilations.
# Its allowed values are:
#
# * AUTO: enable CPU backend, and enable GPU backend if CUDA toolchain is found
#   in environment, otherwise disable it
# * ON: enable CPU backend, and enable GPU backend, fail if CUDA toolchain is
#   not available
# * OFF: enable CPU backend and disable GPU backend
# * ONLY: disable CPU backend and enable GPU backend (used in plugin wheel build
#   process)
# * BARE: disable both CPU and GPU backends
set(
  ERYN_WITH_GPU "AUTO" CACHE
  STRING "Whether to compile GPU backend"
)
set_property(
  CACHE ERYN_WITH_GPU PROPERTY
  STRINGS "AUTO" "ON" "OFF" "ONLY" "BARE"
)

# ERYN_CUDA_ARCH will be passed as the CUDA_ARCHITECTURES property for the CUDA
# backend if it is compiled. See the documentation of CUDA_ARCHITECTURES:
# https://cmake.org/cmake/help/latest/prop_tgt/CUDA_ARCHITECTURES.html
set(
  ERYN_CUDA_ARCH "native"
  CACHE STRING "CUDA Architecture targetted for ERYN compilation (see doc of \
          CMAKE_CUDA_ARCHITECTURES)."
)

set(
  ERYN_MARCH "native"
  CACHE STRING "Value of the -march compiler option if supported by compiler"
)

# ---- Phony target for project specific properties ----
add_library(eryn INTERFACE)