不幸的是，CMake和QMake不兼容，你是对的。相反，你应该将构建的结果复制并粘贴到包含CMake文件CMakeLists.txt的目录下的任何文件夹（在我的例子中是lib/qt5_qscintilla），以及Riverbank Computing提供的头文件的Qsci文件夹。
例如，在Windows和Linux上，文件是libqscintilla2_qt5.a;在macOS上，文件以扩展名.dylib（动态库，抱歉我现在不能告诉你文件名）结束。
那么，试试这个：

cmake_minimum_required(VERSION 3.5)
project(TestingScintilla VERSION 1.0 LANGUAGES CXX)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
find_package(QT${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)
# ... (Exactly same for Gui and Widgets)
set(QSCINTILLA_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/lib/qt5_qscintilla/include/Qsci")
set(QSCINTILLA_LIBRARY "${CMAKE_CURRENT_LIST_DIR}/lib/qt5_qscintilla/libqscintilla2_qt5.a")
# Directory may vary. Change them to where your files are located.
include_directories(${QSCINTILLA_INCLUDE_DIR})

# ...
# ...
# ...
target_link_libraries(TestingScintilla PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
target_link_libraries(TestingScintilla PRIVATE ${QSCINTILLA_LIBRARY})

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