我的 CMakeLists 有问题吗？

Posted 2023-02-23

【中文标题】我的 CMakeLists 有问题吗？

【英文标题】：Is there something wrong with my CMakeLists?

【发布时间】：2011-05-20 14:14:18

【问题描述】：

以下是我的 CMakeLists 文件。默认情况下，我希望它在 agui_allegro5 库中定义符号 ALLEGRO_STATICLINK，但它没有，但是当我检查 WANT_SHARED 时，它定义了它，它不应该定义它，但它没有定义 AGUI_BACKEND_BUILD。是我的逻辑有缺陷还是什么？

cmake_minimum_required(VERSION 2.6)

project(agui)

OPTION(WANT_SHARED "Build agui and the backend as a shared library" OFF) 

OPTION(WANT_ALLEGRO5_BACKEND "Build the Allegro 5 backend" ON) 

set(AGUI_SOURCES
    src/Agui/ActionEvent.cpp
    src/Agui/ActionListener.cpp
    src/Agui/BaseTypes.cpp
    src/Agui/BlinkingEvent.cpp
    src/Agui/BorderLayout.cpp
    src/Agui/Color.cpp
    src/Agui/Dimension.cpp
    src/Agui/EmptyWidget.cpp
    src/Agui/EventArgs.cpp
    src/Agui/FlowLayout.cpp
    src/Agui/FocusListener.cpp
    src/Agui/FocusManager.cpp
    src/Agui/Font.cpp
    src/Agui/FontLoader.cpp
    src/Agui/Graphics.cpp
    src/Agui/GridLayout.cpp
    src/Agui/Gui.cpp
    src/Agui/Image.cpp
    src/Agui/ImageLoader.cpp
    src/Agui/Input.cpp
    src/Agui/KeyboardListener.cpp
    src/Agui/Layout.cpp
    src/Agui/MouseListener.cpp
    src/Agui/Point.cpp
    src/Agui/Rectangle.cpp
    src/Agui/ResizableText.cpp
    src/Agui/ResizableBorderLayout.cpp
    src/Agui/SelectionListener.cpp
    src/Agui/TopContainer.cpp
    src/Agui/Widget.cpp
    src/Agui/WidgetListener.cpp
    src/Agui/Widgets/Button/Button.cpp
    src/Agui/Widgets/Button/ButtonListener.cpp
    src/Agui/Widgets/CheckBox/CheckBox.cpp
    src/Agui/Widgets/CheckBox/CheckBoxListener.cpp
    src/Agui/Widgets/DropDown/DropDown.cpp
    src/Agui/Widgets/DropDown/DropDownListener.cpp
    src/Agui/Widgets/Frame/Frame.cpp
    src/Agui/Widgets/Frame/FrameListener.cpp
    src/Agui/Widgets/Label/Label.cpp
    src/Agui/Widgets/Label/LabelListener.cpp
    src/Agui/Widgets/ListBox/ListBox.cpp
    src/Agui/Widgets/ListBox/ListBoxListener.cpp
    src/Agui/Widgets/RadioButton/RadioButton.cpp
    src/Agui/Widgets/RadioButton/RadioButtonListener.cpp
    src/Agui/Widgets/RadioButton/RadioButtonGroup.cpp
    src/Agui/Widgets/ScrollBar/HScrollBar.cpp
    src/Agui/Widgets/ScrollBar/HScrollBarListener.cpp
    src/Agui/Widgets/ScrollBar/VScrollBar.cpp
    src/Agui/Widgets/ScrollBar/VScrollBarListener.cpp
    src/Agui/Widgets/ScrollPane/ScrollPane.cpp
    src/Agui/Widgets/Slider/Slider.cpp
    src/Agui/Widgets/Slider/SliderListener.cpp
    src/Agui/Widgets/Tab/Tab.cpp
    src/Agui/Widgets/Tab/TabbedPane.cpp
    src/Agui/Widgets/Tab/TabbedPaneListener.cpp
    src/Agui/Widgets/TextBox/TextBox.cpp
    src/Agui/Widgets/TextBox/TextBoxListener.cpp
    src/Agui/Widgets/TextBox/ExtendedTextBox.cpp
    src/Agui/Widgets/TextField/TextField.cpp
    src/Agui/Widgets/TextField/TextFieldListener.cpp
    )

set(ALLEGRO5_BACKEND_SOURCES
    src/Agui/Backends/Allegro5/Allegro5Font.cpp
    src/Agui/Backends/Allegro5/Allegro5FontLoader.cpp
    src/Agui/Backends/Allegro5/Allegro5Graphics.cpp
    src/Agui/Backends/Allegro5/Allegro5Image.cpp
    src/Agui/Backends/Allegro5/Allegro5ImageLoader.cpp
    src/Agui/Backends/Allegro5/Allegro5Input.cpp
    )

    include_directories (./include) 
if(WANT_SHARED)
  add_library(agui SHARED $AGUI_SOURCES)
  set_target_properties(agui PROPERTIES DEFINE_SYMBOL "AGUI_BUILD")

  if(WANT_ALLEGRO5_BACKEND)
    add_library(agui_allegro5 SHARED $ALLEGRO5_BACKEND_SOURCES)
    set_target_properties(agui_allegro5 PROPERTIES DEFINE_SYMBOL "AGUI_BACKEND_BUILD")
    target_link_libraries (agui_allegro5 agui)
  endif()

else()
  add_library(agui STATIC $AGUI_SOURCES)

  if(WANT_ALLEGRO5_BACKEND)
    add_library(agui_allegro5 STATIC $ALLEGRO5_BACKEND_SOURCES)
    set_target_properties(agui_allegro5 PROPERTIES DEFINE_SYMBOL "ALLEGRO_STATICLINK")
  endif()

endif()

谢谢

【问题讨论】：

WANT_SHARED -> OFF 但WANT_ALLEGRO5_BACKEND -> ON？你确定你不想保持一致吗？当我想要一些东西时，我通常需要打开一些标志，而不是关闭。

@karlphillip 好的，我会改变它，但为什么它只在某些情况下定义 ALLEGRO_STATICLINK？

'cmake-standard' BUILD_SHARED_LIBS 变量有什么问题？如果 BUILD_SHARED_LIBS 为 true/on，则 add_library 将假定为共享，否则为静态。

【参考方案1】：

根据CMake documentation“DEFINE_SYMBOL 设置在共享库中编译源时定义的预处理器符号的名称”，当您尝试在静态库上使用它时，因此没有效果。您可能还会发现 this discussion 很有用。

【参考方案2】：

Cmake 文档说属性DEFINE_SYMBOL 仅用于共享库，请尝试使用COMPILE_DEFINITIONS 属性。