CMakeLists.txt

cmake_minimum_required(VERSION 3.10)
if(${CMAKE_VERSION} VERSION_LESS 3.12)
    project(
        Htool
        VERSION 1.0
        LANGUAGES CXX)
else()
    project(
        Htool
        VERSION 1.0
        DESCRIPTION "A header only c++ library that provides Hierarchical matrices."
        HOMEPAGE_URL "https://github.com/htool-ddm/htool"
        LANGUAGES CXX)
endif()

# To force c++11
if(${CMAKE_VERSION} VERSION_LESS 3.1)
    add_compile_options(-std=c++11)
elseif(${CMAKE_VERSION} VERSION_LESS 3.6.3 AND ${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
    add_compile_options(-std=c++11)
else()
    set(CMAKE_CXX_STANDARD 11)
    set(CMAKE_CXX_STANDARD_REQUIRED ON)
endif()

# To set default CMAKE_BUILD_TYPE
set(default_build_type "Release")
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
    set(CMAKE_BUILD_TYPE
        "${default_build_type}"
        CACHE STRING "Choose the type of build." FORCE)
endif()
message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")

# Formatting
include(cmake/formatting.cmake)
file(GLOB_RECURSE ALL_CODE_FILES ${PROJECT_SOURCE_DIR}/src/*.[h]pp)

clang_format(format ${ALL_CODE_FILES})
cmake_format(cmake_format ${PROJECT_SOURCE_DIR}/CMakeLists.txt)

# Files to do find_package for some module
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake_modules")

# MPI
find_package(MPI REQUIRED)
message("-- MPI libraries found in " "${MPI_LIBRARIES}")
message("-- MPI include files found in " "${MPI_INCLUDE_PATH}")
separate_arguments(MPIEXEC_PREFLAGS) # to support multi flags

# OPENMP
find_package(OpenMP)

# BLAS
find_package(BLAS REQUIRED)
message("-- Found Blas implementation:" "${BLAS_LIBRARIES}")

# LAPACK
find_package(LAPACK)
message("-- Found Lapack:" "${LAPACK_LIBRARIES}")

# MPI4PY
find_package(MPI4PY REQUIRED)
message("-- Found MPI4PY:" "${MPI4PY_INCLUDE_DIR}")

add_subdirectory(lib/pybind11)

pybind11_add_module(Htool src/htool/main.cpp)
target_include_directories(
    Htool
    PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/lib/htool/include>
            $<INSTALL_INTERFACE:lib/htool/include>
            lib/htool/include
            lib/hpddm/include
            ${MPI_INCLUDE_PATH}
            ${MKL_INC_DIR}
            ${MPI4PY_INCLUDE_DIR})
target_link_libraries(Htool PRIVATE ${MPI_LIBRARIES} ${BLAS_LIBRARIES} ${LAPACK_LIBRARIES} ${ARPACK_LIBRARIES} ${OpenMP_CXX_LIBRARIES})

target_compile_definitions(Htool PRIVATE "-DPYTHON_INTERFACE" "-DWITH_HPDDM")

if(CODE_COVERAGE AND (CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU"))
    target_compile_options(Htool PRIVATE -fprofile-arcs -ftest-coverage)
    target_link_libraries(Htool PRIVATE gcov)
endif()

# target_compile_features(Htool INTERFACE cxx_std_11)