CMakeLists.txt

cmake_minimum_required(VERSION 3.8)
project(pixelcrawl)

find_package(Eigen3 3.3 REQUIRED NO_MODULE)
# find_package(pybind11 2.2 REQUIRED NO_MODULE)
add_subdirectory(external/pybind11)

pybind11_add_module(pixelcrawl world/bindings.cpp)
target_compile_features(pixelcrawl PRIVATE cxx_std_14)
target_link_libraries(pixelcrawl PRIVATE Eigen3::Eigen)

target_compile_options(pixelcrawl PRIVATE -Wall -Werror -Wextra)

## Performance flags
# Measurements on my desktop:
# gcc8.2, -O2, and removing -march=native: difference ~10%
# clang7.0: 2x slower than gcc (benchmark: test_world_tick)
# debug with "-g -fno-omit-frame-pointer": ~2% slowdown
# -ffast-math: ~3%

target_compile_options(pixelcrawl PRIVATE -O3 -march=native -ffast-math)
# target_compile_options(pixelcrawl PRIVATE -g -fno-omit-frame-pointer)

# only the dask framework should distribute tasks to cores
# (not sure why this is not working; still need OMP_NUM_THREADS=1 env variable)
target_compile_definitions(pixelcrawl PRIVATE EIGEN_DONT_PARALLELIZE)
target_compile_options(pixelcrawl PRIVATE -fno-openmp)


# pytest (not so nice, maybe just run start them manually)
enable_testing()
find_package(Python3 REQUIRED COMPONENTS Interpreter)
add_test(NAME world
  COMMAND Python3::Interpreter -m pytest -r a -v --benchmark-disable
  ${PROJECT_SOURCE_DIR}/world
  ${PROJECT_SOURCE_DIR}/lut2d
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
set_tests_properties(world PROPERTIES
  ENVIRONMENT PYTHONPATH=${CMAKE_CURRENT_BINARY_DIR})