ExternalProject_Add(fmt
    URL https://github.com/fmtlib/fmt/archive/refs/tags/8.1.1.tar.gz
    #CMAKE_ARGS -DEVENT__LIBRARY_TYPE:STRING=STATIC
    INSTALL_COMMAND ""
    CONFIGURE_COMMAND cmake -DCMAKE_TOOLCHAIN_FILE=${CMAKE_CURRENT_SOURCE_DIR}/cmake/toolchain.cmake <SOURCE_DIR>
    BUILD_COMMAND make fmt
    )

ExternalProject_Get_property(fmt BINARY_DIR)
set(FMT_BINARY_DIR ${BINARY_DIR})

ExternalProject_Get_property(fmt SOURCE_DIR)
set(FMT_SRC_DIR ${SOURCE_DIR})

include_directories(${FMT_SRC_DIR}/include)

link_directories(${FMT_BINARY_DIR})
link_libraries(fmt.a)