function(projt_add_libqrencode)
    # Avoid optional tools/tests that require getopt/PNG on Windows.
    if(WIN32)
        set(_qrencode_prev_build_shared_libs "${BUILD_SHARED_LIBS}")
        set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
        set(ENABLE_SHARED OFF CACHE BOOL "" FORCE)
        set(ENABLE_STATIC ON CACHE BOOL "" FORCE)
    endif()
    set(WITH_TOOLS OFF CACHE BOOL "" FORCE)
    set(WITH_PNG OFF CACHE BOOL "" FORCE)
    set(_launcher_prev_build_testing "${BUILD_TESTING}")
    set(_launcher_prev_with_tests "")
    set(_launcher_with_tests_set FALSE)
    if(DEFINED WITH_TESTS)
        set(_launcher_prev_with_tests "${WITH_TESTS}")
        set(_launcher_with_tests_set TRUE)
    endif()
    set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
    set(WITH_TESTS OFF CACHE BOOL "" FORCE)
    set(_qrencode_prev_install_libdir "")
    set(_qrencode_install_libdir_set FALSE)
    if(APPLE)
        set(_qrencode_bundle_dir "ProjTLauncher.app/Contents/Frameworks")
        if(DEFINED Launcher_Name AND NOT Launcher_Name STREQUAL "")
            set(_qrencode_bundle_dir "${Launcher_Name}.app/Contents/Frameworks")
        endif()
        if(DEFINED CMAKE_INSTALL_LIBDIR)
            set(_qrencode_prev_install_libdir "${CMAKE_INSTALL_LIBDIR}")
            set(_qrencode_install_libdir_set TRUE)
        endif()
        set(CMAKE_INSTALL_LIBDIR "${_qrencode_bundle_dir}" CACHE PATH "" FORCE)
    endif()
    if(UNIX AND NOT APPLE)
        if(DEFINED Launcher_BUNDLED_LIBDIR AND NOT Launcher_BUNDLED_LIBDIR STREQUAL "")
            projt_push_install_libdir("${Launcher_BUNDLED_LIBDIR}")
        endif()
        if(DEFINED Launcher_BUNDLED_INCLUDEDIR AND NOT Launcher_BUNDLED_INCLUDEDIR STREQUAL "")
            projt_push_install_includedir("${Launcher_BUNDLED_INCLUDEDIR}")
        endif()
    endif()
    projt_push_output_dirs("libqrencode")
    projt_push_autogen_disabled()
    set(PROJT_DISABLE_SUMMARY ON CACHE BOOL "" FORCE)
    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode libqrencode)
    projt_pop_autogen_disabled()
    projt_pop_output_dirs()
    if(UNIX AND NOT APPLE)
        if(DEFINED Launcher_BUNDLED_INCLUDEDIR AND NOT Launcher_BUNDLED_INCLUDEDIR STREQUAL "")
            projt_pop_install_includedir()
        endif()
        if(DEFINED Launcher_BUNDLED_LIBDIR AND NOT Launcher_BUNDLED_LIBDIR STREQUAL "")
            projt_pop_install_libdir()
        endif()
    endif()
    if(APPLE)
        if(_qrencode_install_libdir_set)
            set(CMAKE_INSTALL_LIBDIR "${_qrencode_prev_install_libdir}" CACHE PATH "" FORCE)
        else()
            unset(CMAKE_INSTALL_LIBDIR CACHE)
        endif()
    endif()
    if(WIN32)
        set(BUILD_SHARED_LIBS "${_qrencode_prev_build_shared_libs}" CACHE BOOL "" FORCE)
    endif()
    set(BUILD_TESTING "${_launcher_prev_build_testing}" CACHE BOOL "" FORCE)
    if(_launcher_with_tests_set)
        set(WITH_TESTS "${_launcher_prev_with_tests}" CACHE BOOL "" FORCE)
    else()
        unset(WITH_TESTS CACHE)
    endif()
    unset(_launcher_prev_build_testing)
    unset(_launcher_prev_with_tests)
    unset(_launcher_with_tests_set)
    unset(_qrencode_prev_install_libdir)
    unset(_qrencode_install_libdir_set)
    add_library(qrcodegenerator ALIAS qrencode)
    # Ensure the qrencode target exposes include directories so consumers can find qrencode.h
    if(TARGET qrencode)
        get_target_property(_qr_inc qrencode INTERFACE_INCLUDE_DIRECTORIES)
        if(NOT _qr_inc)
            target_include_directories(qrencode PUBLIC
                "${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode"
                "${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode/src"
                "${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode/lib"
                "${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode/include")
        endif()
    endif()
    if(NOT DEFINED QRENCODE_INC OR QRENCODE_INC STREQUAL "")
        set(QRENCODE_INC "${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode;${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode/include;${CMAKE_CURRENT_SOURCE_DIR}/../libqrencode/lib" CACHE PATH "QRENCODE include dir" FORCE)
    endif()
endfunction()