CMakeLists.txt

cmake_minimum_required(VERSION 3.0)

project(utboost)

option(USE_OPENMP "Enable OpenMP" ON)
option(BUILD_TEST "Build C++ tests with Google Test" OFF)
option(USE_DEBUG "Set to ON for Debug mode" OFF)

if(MSVC)
    if(MSVC_VERSION LESS 1800)
        message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a newer msvc.")
    endif()

	set(variables
        CMAKE_C_FLAGS_DEBUG
        CMAKE_C_FLAGS_MINSIZEREL
        CMAKE_C_FLAGS_RELEASE
        CMAKE_C_FLAGS_RELWITHDEBINFO
        CMAKE_CXX_FLAGS_DEBUG
        CMAKE_CXX_FLAGS_MINSIZEREL
        CMAKE_CXX_FLAGS_RELEASE
        CMAKE_CXX_FLAGS_RELWITHDEBINFO
	)

    if(USE_DEBUG)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Od")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4 /O2 /Ob2 /Oi /Ot")
    endif()
else()
    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
    if(NOT USE_DEBUG)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -funroll-loops")
    endif()
endif()

if(USE_DEBUG)
    add_definitions(-DDEBUG)
endif()

if(UNIX OR MINGW OR CYGWIN)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -Wall -std=c++11 -w")
    if(USE_DEBUG)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
    endif()
endif()

if(USE_OPENMP)
    message(STATUS "OpenMP is enabled")
    find_package(OpenMP REQUIRED)
    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
else()
    # Ignore unknown #pragma warning
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-pragmas")
endif(USE_OPENMP)

if(WIN32 AND MINGW)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libstdc++")
endif()

set(CMAKE_INSTALL_PREFIX ${PROJECT_SOURCE_DIR})

set(UTBOOST_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include)
set(UTBOOST_INSTALL_LIB_DIR ${PROJECT_SOURCE_DIR}/lib)

include_directories(${UTBOOST_INCLUDE_DIR})

file(GLOB SOURCES
    src/io/*.cpp
    src/ensemble/*.cpp
    src/learner/*.cpp
    src/metric/*.cpp
    src/split_criteria/*.cpp
    src/objective/*.cpp
)

add_library(_${PROJECT_NAME} SHARED ${SOURCES} src/c_api.cpp)

if(MSVC)
    set_target_properties(_${PROJECT_NAME} PROPERTIES OUTPUT_NAME lib_${PROJECT_NAME})
endif()

if(BUILD_TEST)
    message(STATUS "Building C++ tests with GoogleTest")
    if(MSVC)
        set(
            CompilerFlags
            CMAKE_CXX_FLAGS
            CMAKE_CXX_FLAGS_DEBUG
            CMAKE_CXX_FLAGS_RELEASE
            CMAKE_C_FLAGS
            CMAKE_C_FLAGS_DEBUG
            CMAKE_C_FLAGS_RELEASE
        )
    foreach(CompilerFlag ${CompilerFlags})
        string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
    endforeach()
    endif()

    include(FetchContent)
    FetchContent_Declare(gtest
        QUIET
        URL https://github.com/google/googletest/archive/release-1.10.0.tar.gz
    )
    # configure build of googletest
    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
    set(BUILD_GMOCK OFF CACHE BOOL "" FORCE)
    set(BUILD_GTEST ON CACHE BOOL "" FORCE)
    FetchContent_MakeAvailable(gtest)

    file(GLOB CPP_TEST_SOURCES tests/cpp/*.cpp)

    add_executable(test_utboost ${CPP_TEST_SOURCES})

    target_link_libraries(test_utboost
        PRIVATE
        _${PROJECT_NAME}
        gtest
        gtest_main
    )
endif()

install(TARGETS _${PROJECT_NAME} DESTINATION ${UTBOOST_INSTALL_LIB_DIR})