CMakeLists.txt

cmake_minimum_required(VERSION 3.16)
if(POLICY CMP0135) # https://cmake.org/cmake/help/git-stage/policy/CMP0135.html
    cmake_policy(SET CMP0135 NEW) # Otherwise this policy generates a warning on CMake 3.24
endif()

project(ABACUS
    VERSION 3.0.0
    DESCRIPTION "ABACUS is an electronic structure package based on DFT."
    HOMEPAGE_URL "https://github.com/deepmodeling/abacus-develop"
    LANGUAGES CXX
)

option(ENABLE_LCAO "Enable LCAO calculation." ON)
option(ENABLE_DEEPKS "Enable DeePKS functionality" OFF)
option(ENABLE_LIBXC "Enable LibXC functionality" OFF)
option(USE_CUDA "Enable support to CUDA for PW." OFF)
option(ENABLE_FLOAT_FFTW "Enable support to single precision FFTW library." OFF)
# option(USE_CUSOLVER_LCAO "Enable support to CUSOLVER for LCAO." OFF) # broken
option(USE_ROCM "Enable support to ROCm." OFF)
option(USE_OPENMP "Enable OpenMP in ABACUS." ON)
option(ENABLE_ASAN "Enable AddressSanitizer" OFF)
option(BUILD_TESTING "Build ABACUS unit tests" OFF)
option(INFO "Enable gathering of math library information" OFF)
option(ENABLE_COVERAGE "Enable coverage build." OFF)
option(ENABLE_LIBRI "Enable EXX with LibRI." OFF)
option(USE_ELPA "Enable ELPA" ON)
option(USE_ABACUS_LIBM "Build libmath from source to speed up." ON)
option(GIT_SUBMODULE "Check submodules during build" ON)
option(DEBUG_INFO "Print message for developers to debug." OFF)
# Do not enable it if generated code will run on different CPUs
option(ENABLE_NATIVE_OPTIMIZATION "Enable compilation optimization for the native machine's CPU type" OFF)

if(ENABLE_LCAO)
  set(ABACUS_BIN_NAME abacus)
else()
  set(ABACUS_BIN_NAME abacus_pw)
endif()

list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

if(ENABLE_COVERAGE)
  find_package(codecov)
  if(NOT codecov_FOUND)
    include(FetchContent)
    FetchContent_Declare(
      cmakecodecov
      URL https://github.com/baixiaokuang/CMake-codecov/archive/refs/heads/master.zip
    )
    FetchContent_Populate(cmakecodecov)
    list(APPEND CMAKE_MODULE_PATH ${cmakecodecov_SOURCE_DIR}/cmake)
    find_package(codecov REQUIRED)
  endif()
endif()

set(ABACUS_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/source)
set(ABACUS_TEST_DIR ${CMAKE_CURRENT_SOURCE_DIR}/tests)
set(ABACUS_BIN_PATH ${CMAKE_CURRENT_BINARY_DIR}/${ABACUS_BIN_NAME})
include_directories(${ABACUS_SOURCE_DIR})

add_executable(${ABACUS_BIN_NAME} source/main.cpp)
if(ENABLE_COVERAGE)
  add_coverage(${ABACUS_BIN_NAME})
endif()

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5)
  message(WARNING "GCC4 is not fully supported.")
endif()
add_compile_options(-Wno-write-strings)
set(FETCHCONTENT_QUIET FALSE) # Notify user when cloning git repo

find_program(CCACHE ccache)
if (CCACHE)
  set (CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE} ${CMAKE_CXX_COMPILER_LAUNCHER})
  set (CMAKE_C_COMPILER_LAUNCHER ${CCACHE} ${CMAKE_C_COMPILER_LAUNCHER})
endif()

# Choose build type from: Debug Release RelWithDebInfo MinSizeRel
# Select 'Release' configuration for best performance;
#   this will disable all assertions.
# Other default configurations are also available, see:
# https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#default-and-custom-configurations
# For default flags, see:
# https://github.com/Kitware/CMake/blob/master/Modules/Compiler/GNU.cmake#L55

if(ENABLE_COVERAGE)
  set(CMAKE_BUILD_TYPE "Debug")
endif()
if(ENABLE_ASAN)
  set(CMAKE_BUILD_TYPE "RelWithDebInfo")
endif()

if(NOT CMAKE_BUILD_TYPE)
  add_compile_options(-O3 -g)
endif()

# Force turn off USE_ABACUS_LIBM on Intel Compiler
if (("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel") OR
    ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "IntelLLVM"))
    set(USE_ABACUS_LIBM OFF)
endif()
if (USE_ABACUS_LIBM)
  add_definitions(-DUSE_ABACUS_LIBM)
endif()

if (ENABLE_NATIVE_OPTIMIZATION)
  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=native -mtune=native")
  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native -mtune=native")
endif()

if(ENABLE_LCAO)
  find_package(Cereal REQUIRED)
  include_directories(${CEREAL_INCLUDE_DIR})
  add_compile_definitions(USE_CEREAL_SERIALIZATION)
  add_compile_definitions(__LCAO)
  if (USE_ELPA)
    find_package(ELPA REQUIRED)
    include_directories(${ELPA_INCLUDE_DIR})
    target_link_libraries(${ABACUS_BIN_NAME} ELPA::ELPA)
    add_compile_definitions(__ELPA)
  endif()
else()
  set(ENABLE_DEEPKS OFF)
  set(ENABLE_LIBRI OFF)
endif()

if(DEBUG_INFO)
  add_compile_definitions(__DEBUG)
endif()

find_package(MPI REQUIRED)
include_directories(${MPI_CXX_INCLUDE_PATH})
target_link_libraries(${ABACUS_BIN_NAME} MPI::MPI_CXX)
add_compile_definitions(__MPI)
list(APPEND math_libs MPI::MPI_CXX)

find_package(Threads REQUIRED)
target_link_libraries(${ABACUS_BIN_NAME} Threads::Threads)

if(USE_OPENMP)
  find_package(OpenMP REQUIRED)
  target_link_libraries(${ABACUS_BIN_NAME} OpenMP::OpenMP_CXX)
  add_compile_options(${OpenMP_CXX_FLAGS})
  add_link_options(${OpenMP_CXX_LIBRARIES})
endif()

include(CheckLanguage)
check_language(CUDA)
if(CMAKE_CUDA_COMPILER)
  if(NOT DEFINED USE_CUDA OR NOT DEFINED USE_CUSOLVER_LCAO)
    if (NOT DEFINED USE_CUDA AND NOT DEFINED USE_CUSOLVER_LCAO)
      message("CUDA components detected. \nWill build the CUDA for PW version of ABACUS by default.")
      set(USE_CUDA ON)
      set(USE_CUSOLVER_LCAO OFF)
    elseif (NOT DEFINED USE_CUDA)
      set(USE_CUDA OFF)
    else()
      set(USE_CUSOLVER_LCAO OFF)
    endif()
  else()
    if(NOT USE_CUDA AND NOT USE_CUSOLVER_LCAO)
      message(STATUS "CUDA components detected, but both USE_CUDA and USE_CUSOLVER_LCAO set to OFF. NOT building CUDA version of ABACUS.")
    elseif (USE_CUDA AND USE_CUSOLVER_LCAO)
      message(FATAL_ERROR "USE_CUDA and USE_CUSOLVER_LCAO set, but now they not allowed to coexist.")
    endif()
  endif()
else() # CUDA not found
  if (USE_CUDA OR USE_CUSOLVER_LCAO)
    message(FATAL_ERROR "USE_CUDA or USE_CUSOLVER_LCAO set but no CUDA components found.")
    set(USE_CUDA OFF)
    set(USE_CUSOLVER_LCAO OFF)
  endif()
endif()

if(USE_CUDA OR USE_CUSOLVER_LCAO)
  cmake_minimum_required(VERSION 3.18) # required by `CUDA_ARCHITECTURES` below
  set(CMAKE_CXX_STANDARD 14)
  set(CMAKE_CXX_EXTENSIONS ON)
  set(CMAKE_CUDA_STANDARD ${CMAKE_CXX_STANDARD})
  set(CMAKE_CUDA_STANDARD_REQUIRED ON)
  set(CMAKE_CUDA_HOST_COMPILER ${CMAKE_CXX_COMPILER})
  enable_language(CUDA)
  set_property(
    TARGET ${ABACUS_BIN_NAME}
    PROPERTY CUDA_ARCHITECTURES
    60 # P100
    70 # V100
    75 # T4
    80 # A100
  )
  target_link_libraries(${ABACUS_BIN_NAME}
    -lcudart
    -lnvToolsExt
  )
  include_directories(${CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES})
  if (USE_CUDA)
    add_compile_definitions(__CUDA)
    add_compile_definitions(__UT_USE_CUDA)
    if (CMAKE_BUILD_TYPE STREQUAL "Debug")
      set(CMAKE_CUDA_FLAGS ${CMAKE_CUDA_FLAGS} "-g -G")
    endif()
  endif()
  if (USE_CUSOLVER_LCAO)
    add_compile_definitions(__CUSOLVER_LCAO)
  endif()
endif()


# Warning: CMake add support to HIP in version 3.21. This is rather a new version.
# Use cmake with AMD-ROCm: https://rocmdocs.amd.com/en/latest/Installation_Guide/Using-CMake-with-AMD-ROCm.html
if(USE_ROCM)
  if (NOT DEFINED ROCM_PATH )
    set (ROCM_PATH "/opt/rocm"  CACHE STRING "Default ROCM installation directory." )
  endif ()
  if(NOT DEFINED HIP_PATH)
    if(NOT DEFINED ENV{HIP_PATH})
        set(HIP_PATH "${ROCM_PATH}/hip" CACHE PATH "Path to which HIP has been installed")
    else()
        set(HIP_PATH $ENV{HIP_PATH} CACHE PATH "Path to which HIP has been installed")
    endif()
  endif()
  set(CMAKE_MODULE_PATH "${HIP_PATH}/cmake" ${CMAKE_MODULE_PATH})
  set (HIP_HIPCC_FLAGS -fno-gpu-rdc; --std=c++14) # --amdgpu-target=gfx906

  # find_package(ROCM REQUIRED)
  find_package(HIP REQUIRED)
  find_package(hipfft REQUIRED)
  find_package(hipblas REQUIRED)

  if(HIP_FOUND)
    message(STATUS "Found HIP: " ${HIP_VERSION})
  else()
    message(FATAL_ERROR "Could not find HIP. Ensure that HIP is either installed in ${ROCM_PATH}/hip or the variable HIP_PATH is set to point to the right location.")
  endif()

  include_directories(
    ${ROCM_PATH}/include
    ${ROCM_PATH}/hip/include
    ${ROCM_PATH}/hipfft/include
    ${ROCM_PATH}/hipblas/include
  )
  target_link_libraries(${ABACUS_BIN_NAME}
    hip::device
    hip::host
    hip::hipfft
    roc::hipblas
  )
  add_compile_definitions(__ROCM)
  add_compile_definitions(__UT_USE_ROCM)
  add_compile_definitions(__HIP_PLATFORM_HCC__)
endif()

if(ENABLE_ASAN)
  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
    message(FATAL_ERROR "Address Sanitizer is not supported on Intel compiler.")
  endif()
  add_compile_options(
    -fsanitize=address
    -fno-omit-frame-pointer
  )
  add_link_options(
    -fsanitize=address
  )
  # `add_link_options` only affects executables added after.
  target_link_libraries(${ABACUS_BIN_NAME} -fsanitize=address)
endif()

if(DEFINED ENV{MKLROOT} AND NOT DEFINED MKLROOT)
    set(MKLROOT "$ENV{MKLROOT}")
endif()
if(MKLROOT)
  find_package(IntelMKL REQUIRED)
  add_definitions(-D__MKL)
  include_directories(${MKL_INCLUDE_DIRS} ${MKL_INCLUDE_DIRS}/fftw)

  # Since libtorch will find its own MKL, the fftw part conflicts with the original one.
  # When enable deepks, mkl will be linked within ${TORCH_LIBRARIES}.
  if(NOT ENABLE_DEEPKS)
    list(APPEND math_libs IntelMKL::MKL)
  endif()
else()
  find_package(FFTW3 REQUIRED)
  find_package(LAPACK REQUIRED)
  find_package(ScaLAPACK REQUIRED)
  include_directories(${FFTW3_INCLUDE_DIRS})
  list(APPEND math_libs
    FFTW3::FFTW3
    LAPACK::LAPACK
    ScaLAPACK::ScaLAPACK
  )
  if(USE_OPENMP)
    list(APPEND math_libs FFTW3::FFTW3_OMP)
  endif()
  if (ENABLE_FLOAT_FFTW)
    list(APPEND math_libs FFTW3::FFTW3_FLOAT)
  endif()
  if(CMAKE_CXX_COMPILER_ID MATCHES GNU)
    list(APPEND math_libs -lgfortran)
  elseif(CMAKE_CXX_COMPILER_ID MATCHES Intel)
    list(APPEND math_libs -lifcore)
  elseif(CMAKE_CXX_COMPILER_ID MATCHES Clang)
    list(APPEND math_libs -lgfortran)
  else()
    message(WARNING "Cannot find the correct library for Fortran.")
  endif()
endif()

if (ENABLE_FLOAT_FFTW)
  add_definitions(-D__ENABLE_FLOAT_FFTW)
endif()

if(ENABLE_DEEPKS)
  set(CMAKE_CXX_STANDARD 14)
  find_package(Torch REQUIRED)
  include_directories(${TORCH_INCLUDE_DIRS})
  target_link_libraries(${ABACUS_BIN_NAME} deepks)
  list(APPEND math_libs ${TORCH_LIBRARIES})

  add_compile_options(${TORCH_CXX_FLAGS})

  find_path(libnpy_SOURCE_DIR
    npy.hpp
    HINTS ${libnpy_INCLUDE_DIR}
  )
  if(NOT libnpy_SOURCE_DIR)
    include(FetchContent)
    FetchContent_Declare(
      libnpy
      GIT_REPOSITORY https://github.com/llohse/libnpy.git
      GIT_SHALLOW TRUE
      GIT_PROGRESS TRUE
    )
    FetchContent_MakeAvailable(libnpy)
  endif()
  include_directories(${libnpy_SOURCE_DIR}/include)
  add_compile_definitions(__DEEPKS)
endif()

if (ENABLE_LIBRI)
  set(CMAKE_CXX_STANDARD 14)
  if(NOT (CMAKE_CXX_COMPILER_ID STREQUAL "Intel"))
    message(WARNING "RI related features are only stable if compiled with Intel compiler.")
  endif()
  if(GIT_SUBMODULE)
    find_package(Git QUIET)
    if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
    # Update submodules as needed
      message(STATUS "Submodule update")
      execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
              WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
              RESULT_VARIABLE GIT_SUBMOD_RESULT)
      if(NOT GIT_SUBMOD_RESULT EQUAL "0")
        message(FATAL_ERROR "git submodule update --init --recursive failed with ${GIT_SUBMOD_RESULT}, please checkout submodules")
      endif()
    endif()
    include_directories(${CMAKE_CURRENT_SOURCE_DIR}/deps/LibRI/include)
    include_directories(${CMAKE_CURRENT_SOURCE_DIR}/deps/LibComm/include)
  else()
    if ((NOT LIBRI_DIR) OR (NOT LIBCOMM_DIR))
      message(FATAL_ERROR "Must provide LIBRI_DIR and LIBCOMM_DIR for RI related features.")
    endif()
    include_directories(${LIBRI_DIR}/include)
    include_directories(${LIBCOMM_DIR}/include)
  endif()
  add_compile_definitions(
    __EXX
    EXX_DM=3
    EXX_H_COMM=2
    TEST_EXX_LCAO=0
    TEST_EXX_RADIAL=1
  )
endif()

list(APPEND math_libs m)
target_link_libraries(${ABACUS_BIN_NAME} ${math_libs})

if(DEFINED Libxc_DIR)
  set(ENABLE_LIBXC ON)
endif()
if(ENABLE_LIBXC)
  find_package(Libxc HINTS
    ${Libxc_DIR}/share/cmake/Libxc
    ${Libxc_DIR}/lib/cmake/Libxc
    ${Libxc_DIR}/lib64/cmake/Libxc
  )
  if(${Libxc_FOUND})
    message(STATUS "Found Libxc: version " ${Libxc_VERSION})
    if(${Libxc_VERSION} VERSION_LESS 5.1.7)
      message(FATAL_ERROR "LibXC >= 5.1.7 is required; found ${Libxc_VERSION}")
    endif()
    target_link_libraries(${ABACUS_BIN_NAME} Libxc::xc)
    include_directories(${Libxc_INCLUDE_DIRS})
    add_compile_definitions(USE_LIBXC)
  endif()
endif()

if(DEFINED DeePMD_DIR)
  add_compile_definitions(
    __DPMD
    HIGH_PREC
  )
  add_compile_options(-Wl,--no-as-needed)
  find_package(DeePMD REQUIRED)
  include_directories(${DeePMD_DIR}/include)
  if (DeePMDC_FOUND)
    target_link_libraries(${ABACUS_BIN_NAME}
      DeePMD::deepmd_c
    )
    add_compile_definitions(
      __DPMDC
    )
  else()
    target_link_libraries(${ABACUS_BIN_NAME}
      DeePMD::deepmd_cc
    )
  endif()

  if(NOT DEFINED TensorFlow_DIR)
    set(TensorFlow_DIR ${DeePMD_DIR})
  endif()
  find_package(TensorFlow REQUIRED)
  if (TensorFlow_FOUND)
    target_link_libraries(${ABACUS_BIN_NAME}
      TensorFlow::tensorflow_cc
    )
  endif()
endif()

add_compile_definitions(
  __FFTW3
  __SELINV
  METIS
)

if(INFO)
  message(STATUS "Will gather math lib info.")
  add_compile_definitions(GATHER_INFO)
  # modifications on blas_connector and lapack_connector
endif()

IF (BUILD_TESTING)
  set(CMAKE_CXX_STANDARD 14) # Required in orbital
  include(CTest)
  enable_testing()
  find_package(GTest HINTS /usr/local/lib/ ${GTEST_DIR})
  if(NOT ${GTest_FOUND})
    include(FetchContent)
    FetchContent_Declare(
      googletest
      GIT_REPOSITORY https://github.com/google/googletest.git
      GIT_TAG "origin/main"
      GIT_SHALLOW TRUE
      GIT_PROGRESS TRUE
    )
    FetchContent_MakeAvailable(googletest)
  endif()
  # TODO: Try the GoogleTest module.
  # https://cmake.org/cmake/help/latest/module/GoogleTest.html
  add_subdirectory(tests) # Contains integration tests

  function(AddTest) # function for UT
    cmake_parse_arguments(UT "DYN" "TARGET" "LIBS;DYN_LIBS;STATIC_LIBS;SOURCES;DEPENDS" ${ARGN})
    add_executable(${UT_TARGET} ${UT_SOURCES})

    if(ENABLE_COVERAGE)
      add_coverage(${UT_TARGET})
    endif()

    #dependencies & link library
    target_link_libraries(${UT_TARGET} ${UT_LIBS}
      Threads::Threads GTest::gtest_main GTest::gmock_main)
    if(USE_OPENMP)
      target_link_libraries(${UT_TARGET} OpenMP::OpenMP_CXX)
    endif()
    install(TARGETS ${UT_TARGET} DESTINATION ${CMAKE_BINARY_DIR}/tests )
    add_test(NAME ${UT_TARGET}
      COMMAND ${UT_TARGET}
      WORKING_DIRECTORY $<TARGET_FILE_DIR:${UT_TARGET}>
    )
  endfunction(AddTest)
endif()

add_subdirectory(source)

target_link_libraries(${ABACUS_BIN_NAME}
    base
    cell
    symmetry
    md
    planewave
    surchem
    neighbor
    io_basic
    io_advanced
    relax
    driver
    xc_
    hsolver
    elecstate
    hamilt_general
    hamilt_pwdft
    hamilt_ofdft
    hamilt_stodft
    psi
    esolver
    vdw
    device
)

if(ENABLE_LCAO)
  target_link_libraries(${ABACUS_BIN_NAME}
      hamilt_lcao
      tddft
      orb
      gint
      dftu
  )
  if (USE_ELPA)
    target_link_libraries(${ABACUS_BIN_NAME}
      genelpa
    )
  endif ()
  if(USE_CUSOLVER_LCAO)
    target_link_libraries(diag_cusolver)
  endif()
endif()

if (ENABLE_LIBRI)
  target_link_libraries(${ABACUS_BIN_NAME}
          ri
          libri)
endif()

install(PROGRAMS ${ABACUS_BIN_PATH}
    TYPE BIN
    #DESTINATION ${CMAKE_INSTALL_BINDIR}
)

if(ENABLE_COVERAGE)
  coverage_evaluate()
endif()