CMakeLists.txt

cmake_minimum_required(VERSION 3.25...3.29)

#[=============================================================================[
#                           Basic project definition                           #
]=============================================================================]

include(cmake/DynamicVersion.cmake)
# Get dynamic version and save it to PROJECT_VERSION
dynamic_version(
        PROJECT_PREFIX Spglib_
        FALLBACK_VERSION 0.0.0
)
list(APPEND CMAKE_MESSAGE_CONTEXT Spglib)
project(Spglib
        VERSION ${PROJECT_VERSION}
        LANGUAGES C)
set(Spglib_VERSION_FULL ${PROJECT_VERSION_FULL})
set(Spglib_COMMIT ${GIT_COMMIT})

set(CMAKE_C_VISIBILITY_PRESET hidden)
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS OFF)

if (NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Release)
endif ()

#[=============================================================================[
#                                   Options                                   #
]=============================================================================]

# Boilerplate default values
if (CMAKE_BUILD_TYPE STREQUAL "Debug")
    set(_Spglib_default_debug ON)
else ()
    set(_Spglib_default_debug OFF)
endif ()

#
option(SPGLIB_WITH_Fortran "Spglib: Build Fortran interface" OFF)
option(SPGLIB_WITH_Python "Spglib: Build Python interface" OFF)
option(SPGLIB_USE_OMP "Spglib: Build with OpenMP support" OFF)
option(SPGLIB_WITH_TESTS "Spglib: Build unit tests" ${PROJECT_IS_TOP_LEVEL})
option(SPGLIB_SHARED_LIBS "Spglib: Build as a shared library" ${PROJECT_IS_TOP_LEVEL})
option(SPGLIB_INSTALL "Spglib: Install project" ${PROJECT_IS_TOP_LEVEL})
option(SPGLIB_WARNINGS "Spglib: Enable warning messages" ON)
option(SPGLIB_INFO "Spglib: Enable info messages" ON)
option(SPGLIB_DEBUG "Spglib: Build in debug mode" ${_Spglib_default_debug})
option(SPGLIB_COMPILATION_WARNING "Spglib: Enable compilation warnings" OFF)
mark_as_advanced(
        SPGLIB_DEBUG
        SPGLIB_WARNINGS
        SPGLIB_COMPILATION_WARNING
)

#[=============================================================================[
#                            Project configuration                            #
]=============================================================================]

# Include basic tools
include(cmake/PackageCompsHelper.cmake)
include(FetchContent)
include(CMakePackageConfigHelpers)
include(GNUInstallDirs)

# Define basic parameters
set(BUILD_SHARED_LIBS ${SPGLIB_SHARED_LIBS})
if (BUILD_SHARED_LIBS)
    set(Spglib_LIB_TYPE "shared")
else ()
    set(Spglib_LIB_TYPE "static")
endif ()

set(CMAKE_MACOSX_RPATH 1)
# Windows setup
if (WIN32)
    # Add appropriate debug flags
    set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT "$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>")
endif ()

# Report configuration
message(STATUS "Spglib:: Build type: ${CMAKE_BUILD_TYPE}")
message(STATUS "Spglib:: Version ${PROJECT_VERSION_FULL}")

#[=============================================================================[
#                                Public targets                                #
]=============================================================================]

add_library(Spglib_symspg)
add_library(Spglib::symspg ALIAS Spglib_symspg)

#[=============================================================================[
#                              External packages                              #
]=============================================================================]

# Include third-party libraries
set(spglib_dependencies "")
if (SPGLIB_USE_OMP)
    find_package(OpenMP REQUIRED COMPONENTS C)
endif ()

#[=============================================================================[
#                               Main definition                               #
]=============================================================================]

# Main project
set_target_properties(Spglib_symspg PROPERTIES
        VERSION ${PROJECT_VERSION}
        SOVERSION ${PROJECT_VERSION_MAJOR}
        EXPORT_NAME symspg
        OUTPUT_NAME symspg
)
# Main definitions inside src
add_subdirectory(include)
add_subdirectory(src)

# Bindings
if (NOT TARGET Spglib::fortran AND SPGLIB_WITH_Fortran)
    add_subdirectory(fortran)
endif ()
if (NOT TARGET Spglib::python AND SPGLIB_WITH_Python)
    add_subdirectory(python)
endif ()

# Testing
if (SPGLIB_WITH_TESTS)
    enable_testing()
    add_subdirectory(test)
endif ()

#[=============================================================================[
#                              Install or Export                              #
]=============================================================================]

# Installation

# Copy PackageCompsHelper to make it available for build import
configure_file(cmake/PackageCompsHelper.cmake PackageCompsHelper.cmake COPYONLY)
if (SPGLIB_INSTALL)
    # pkg-config files
    configure_file(cmake/spglib.pc.in spglib.pc @ONLY)
    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/spglib.pc
            DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
    )

    # cmake export files
    write_basic_package_version_file(
            ${CMAKE_CURRENT_BINARY_DIR}/SpglibConfigVersion.cmake
            VERSION ${PROJECT_VERSION}
            COMPATIBILITY SameMajorVersion)
    configure_package_config_file(
            cmake/SpglibConfig.cmake.in
            ${CMAKE_CURRENT_BINARY_DIR}/SpglibConfig.cmake
            INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Spglib)
    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/SpglibConfigVersion.cmake
            ${CMAKE_CURRENT_BINARY_DIR}/SpglibConfig.cmake
            cmake/PackageCompsHelper.cmake
            DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Spglib
    )
    export_components(LIB_TYPE ${Spglib_LIB_TYPE})
endif ()

# Make project available for FetchContent
if (NOT PROJECT_IS_TOP_LEVEL)
    # Set variables for FetchContent
    # All variables have to be consistent with SpglibConfig.cmake
    set(Spglib_Fortran ${SPGLIB_WITH_Fortran})
    set(Spglib_Python ${SPGLIB_WITH_Python})
    set(Spglib_OMP ${SPGLIB_USE_OMP})
    # Propagate variables
    return(PROPAGATE
            Spglib_VERSION
            Spglib_VERSION_MAJOR
            Spglib_VERSION_MINOR
            Spglib_VERSION_PATCH
            Spglib_VERSION_TWEAK
            Spglib_VERSION_FULL
            Spglib_COMMIT
            Spglib_Fortran
            Spglib_Python
            Spglib_OMP
            Spglib_LIB_TYPE
    )
endif ()