CMake和Qt5 AUTOMOC错误 [英] CMake and Qt5 AUTOMOC error

问题描述

我有一个使用Qt5的项目，并且有一个用于创建Visual Studio解决方案的 CMakeLists.txt 文件.

I have a project which uses Qt5 and I have a CMakeLists.txt file that I use for creating the Visual Studio Solution.

这是我的 CMakeLists.txt

cmake_policy(SET CMP0020 NEW)
set(CMAKE_AUTOMOC ON)
find_package(Qt5 REQUIRED COMPONENTS core widgets)

set(COMMON_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/src)

include_directories( ${Boost_INCLUDE_DIRS}
    ${COMMON_INCLUDE_DIR}
)


file(GLOB_RECURSE COMMON_SOURCE "*.hpp" "*.cpp")
add_library(${PROJECT_NAME} ${COMMON_SOURCE})
qt5_use_modules(${PROJECT_NAME} Widgets)

当我尝试编译代码时，它返回以下错误:

When I try to compile the code it returns the following error:

>AUTOMOC : error : C:/Users/.../Projects/MyProject/build/MyProjects_automoc.cpp The file includes the moc file "moc_MyFile.cpp", but could not find header "MyFile{.h,.hh,.h++,.hm,.hpp,.hxx,.in,.txx}" in C:/Users/.../Projects/MyProject/build/

moc文件已自动生成，并且标题不在build文件夹中，而是在src目录中的文件夹中.

The moc file have been auto-generated and the header is not in the build folder, but in a folder locate in the src directory.

如何解决此错误?

推荐答案

添加以下内容很好:

set(CMAKE_INCLUDE_CURRENT_DIR ON)

使用 AUTOMOC 功能时.此外，

include_directories(
  ...
  ${QT_USE_FILE}
  ...
)

是一个错误.它应该是:

is a mistake. It should rather be:

include(${QT_USE_FILE})

最后，您应该只显式地将源推入编译，而不能不标头！如文档中所述:

Finally, you should only explicitly push sources to compilation, but not headers! As stated in the documentation:

• 如果 Q_OBJECT 在 foo.h 中(即在头文件中声明了 QObject )，然后在相应的 foo.cpp 中不要忘记添加 #include"moc_foo.cpp" ，最好在最后添加文件的

• If Q_OBJECT is in the foo.h (i.e. QObject is declared in the header file), then in the corresponding foo.cpp don't forget to add #include "moc_foo.cpp", preferably at the end of the file;

如果 foo.cpp 中包含 Q_OBJECT (即在源文件中声明了 QObject )，然后再次在 foo.cpp 本身中不要忘记添加 #include"foo.moc" ，最好在最后添加文件.

If Q_OBJECT is in the foo.cpp (i.e. QObject is declared in the source file), then, again, in the foo.cpp itself don't forget to add #include "foo.moc", preferably at the end of the file.

因此，请遵循以下建议并进行更改

Therefore, follow these recommendations and change

file(GLOB_RECURSE COMMON_SOURCE "*.hpp" "*.cpp")

到

file(GLOB_RECURSE COMMON_SOURCE "*.cpp")

您还可以找到 我的其他答案 .您的问题非常相似，因此建议您在下一次发布之前进行更好的搜索.

You could also find my other answer helpful. Your question is very similar, so I'd recommend to search better before posting next time.

祝你好运.

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