cmake_minimum_required(VERSION 3.10)

# Project and C standard configuration
project(bhlib LANGUAGES C)
set(CMAKE_C_STANDARD 90)
set(CMAKE_C_STANDARD_REQUIRED ON)

# Project includes
include(CheckIPOSupported)
include(CheckIncludeFile)
include(CheckSymbolExists)

# Check for IPO/LTO
check_ipo_supported(RESULT supported)

if(supported)
    message(STATUS "IPO/LTO enabled")
    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
endif()

# Enable testing
include(CTest)
enable_testing()

# Set library code
set(BHLIB_SOURCE
    src/algo.c
    src/hashmap.c
    src/queue.c
    src/thread.c
)

set(BHLIB_HEADER
    include/bh/algo.h
    include/bh/hashmap.h
    include/bh/queue.h
)

set(BHLIB_INCLUDE_DIRS
    include
    ${PROJECT_BINARY_DIR}/include
)


# Determine platform
if(WIN32)
    message(STATUS "Platform - Win32")

    # Check multithreading support
    check_symbol_exists(_beginthread process.h BHLIB_USE_WINTHREAD)
    if(BHLIB_USE_WINTHREAD)
        message(STATUS "Multithreading enabled")
        list(APPEND BHLIB_SOURCE
            src/thread_win.c
        )
    else()
        message(STATUS "Multithreading disabled")
        list(APPEND BHLIB_SOURCE
            src/thread_null.c
        )
    endif()
elseif(UNIX)
    message(STATUS "Platform: Unix (Linux/BSD/MacOS X)")

    # Check multithreading support
    check_include_file(pthread.h BHLIB_USE_PTHREAD)
    if(BHLIB_USE_PTHREAD)
        message(STATUS "Multithreading enabled")
        list(APPEND BHLIB_SOURCE
            src/thread_posix.c
        )
    else()
        message(STATUS "Multithreading disabled")
        list(APPEND BHLIB_SOURCE
            src/thread_null.c
        )
    endif()
else()
    message(STATUS "Platform: Unknown")
    message(STATUS "Multithreading disabled")
    list(APPEND BHLIB_SOURCE
        src/thread_null.c
    )
endif()

# Configure library
configure_file(include/bh/config.in include/bh/config.h)

# Library
add_library(bhlib STATIC ${BHLIB_SOURCE} ${BHLIB_HEADER})
target_include_directories(bhlib PUBLIC ${BHLIB_INCLUDE_DIRS})

# Runtime definition
add_executable(main
               main.c
)

target_link_libraries(main bhlib)

# Tests
add_subdirectory(unit)
add_subdirectory(tests)