add_dependencies (${ErlangRocksDBNIF_TARGET} lz4)
include(ExternalProject)
include(GNUInstallDirs)

set(LZ4_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../deps/lz4/contrib/cmake_unofficial")
set(LZ4_ROOT_DIR "${CMAKE_CURRENT_BINARY_DIR}/lz4")
set(LZ4_INCLUDE_DIR "${LZ4_ROOT_DIR}/include")
set(LZ4_STATIC_LIB "${LZ4_ROOT_DIR}/${CMAKE_INSTALL_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}lz4${CMAKE_STATIC_LIBRARY_SUFFIX}")
set(LZ4_LIBRARY ${LZ4_STATIC_LIB})

ExternalProject_Add(lz4
    SOURCE_DIR "${LZ4_SOURCE_DIR}"
    CMAKE_ARGS
        -DCMAKE_INSTALL_PREFIX=${LZ4_ROOT_DIR}
        -DCMAKE_POSITION_INDEPENDENT_CODE=ON
        -DCMAKE_POLICY_VERSION_MINIMUM=3.5
        -DLZ4_BUILD_LEGACY_LZ4C=OFF
        -DBUILD_SHARED_LIBS=OFF
    BINARY_DIR ${LZ4_ROOT_DIR}
    BUILD_BYPRODUCTS "${LZ4_STATIC_LIB}"
    )

ExternalProject_Get_Property(lz4 BINARY_DIR)

message(STATUS "LZ4 library: ${LZ4_LIBRARY}")
message(STATUS "LZ4 includes: ${LZ4_INCLUDE_DIR}")

set(LZ4_FOUND TRUE)

mark_as_advanced(
    LZ4_ROOT_DIR
    LZ4_LIBRARY
    LZ4_INCLUDE_DIR
)