CMakeLists.txt

cmake_minimum_required(VERSION 3.12)

project(ExaCA LANGUAGES CXX)
set(PROJECT_VERSION "2.1.0-dev")

include(GNUInstallDirs)

option(ExaCA_REQUIRE_FINCH "Build with Finch heat transport support" OFF)
# Build with Finch if available or if requested.
find_package(Finch QUIET)
if(ExaCA_REQUIRE_FINCH OR Finch_FOUND)
  set(ExaCA_ENABLE_FINCH ON)
  find_package(Finch REQUIRED COMPONENTS Finch::Core Finch::ScanPaths)
  message(STATUS "Finch heat transfer enabled.")
endif()

find_package(Kokkos 4.0 REQUIRED)
find_package(MPI REQUIRED)

if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.24")
  cmake_policy(SET CMP0135 NEW)
endif()
option(ExaCA_REQUIRE_EXTERNAL_JSON
       "Build without automatic JSON dependency download" OFF)
if(ExaCA_REQUIRE_EXTERNAL_JSON)
  find_package(nlohmann_json 3.10.0 REQUIRED)
else()
  find_package(nlohmann_json 3.10.0 QUIET)
  if(NOT NLOHMANN_JSON_FOUND)
    include(FetchContent)
    # Using most recent release here
    FetchContent_Declare(
      json
      URL https://github.com/nlohmann/json/releases/download/v3.11.2/json.tar.xz
    )
    FetchContent_MakeAvailable(json)
    # Needs to be installed only in this case.
    install(
      TARGETS nlohmann_json
      EXPORT ExaCA_Targets
      LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
      ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
  endif()
endif()

find_package(Git)
if(GIT_FOUND AND IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/.git)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} log --pretty=format:%H -n 1
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
    OUTPUT_VARIABLE ExaCA_GIT_COMMIT_HASH)
else()
  set(ExaCA_GIT_COMMIT_HASH "Not a git repository")
endif()
message(STATUS "ExaCA commit: ${ExaCA_GIT_COMMIT_HASH}")

# NOTE: this order is specifically used in the unit tests. FIXME: remove PTHREAD
set(EXACA_SUPPORTED_DEVICES SERIAL PTHREAD THREADS OPENMP CUDA HIP)

add_subdirectory(src)

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/ExaCAconfig.cmakein
               ${CMAKE_CURRENT_BINARY_DIR}/ExaCAconfig.cmake @ONLY)
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/ExaCAconfig.cmake"
        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ExaCA)

# Install data files
file(GLOB MATERIALS examples/Materials/*)
file(GLOB SUBSTRATE examples/Substrate/GrainOrientation*.csv)
install(FILES ${MATERIALS}
        DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/ExaCA)
install(FILES ${SUBSTRATE}
        DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/ExaCA)

option(ExaCA_ENABLE_TESTING "Build unit tests" OFF)

if(ExaCA_ENABLE_TESTING)
  find_package(GTest 1.10 REQUIRED)
  # Workaround for FindGTest module in CMake older than 3.20
  if(TARGET GTest::gtest)
    set(gtest_target GTest::gtest)
  elseif(TARGET GTest::GTest)
    set(gtest_target GTest::GTest)
  else()
    message(FATAL_ERROR "bug in GTest find module workaround")
  endif()
  enable_testing()

  set(TEST_HARNESS_DIR ${CMAKE_SOURCE_DIR}/unit_test)
  set(EXACA_TEST_DEVICES)
  foreach(_device ${EXACA_SUPPORTED_DEVICES})
    if(Kokkos_ENABLE_${_device})
      list(APPEND EXACA_TEST_DEVICES ${_device})
    endif()
  endforeach()

  add_subdirectory(unit_test)
endif()

add_subdirectory(bin)

add_subdirectory(analysis)

# clang-format
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
find_package(CLANG_FORMAT 10)
if(CLANG_FORMAT_FOUND)
  file(GLOB_RECURSE FORMAT_SOURCES *.[c,h]pp)
  add_custom_target(
    format
    COMMAND ${CLANG_FORMAT_EXECUTABLE} -i -style=file ${FORMAT_SOURCES}
    DEPENDS ${FORMAT_SOURCES})
endif()