我有一个简单的 CMake 项目:
proj (project folder)
├── a.h
├── a.cpp
└── CMakeLists.txt
CMakeLists.txt:
cmake_minimum_required(VERSION 3.2)
set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_AUTOMOC ON)
project(proj)
set( proj_SOURCE
a.cpp
)
find_package(Qt5Core)
set( proj_LIBRARIES
Qt5::Core
)
add_library(proj SHARED ${proj_SOURCE})
target_link_libraries(proj ${proj_LIBRARIES})
a.h:
#pragma once
#include <QObject>
class A : public QObject
{
Q_OBJECT
public:
explicit A(QObject *parent = 0);
};
a.cpp:
#include "a.h"
A::A(QObject *parent) : QObject(parent)
{
}
一切都编译得很好。接下来,我尝试将头文件和源文件移动到不同的文件夹中,如下所示:
proj (project folder)
├── include
│ └── a.h
├── src
│ └── a.cpp
└── CMakeLists.txt
并尝试了以下调用的不同配置:
include_directories("include")
include_directories("src")
set( proj_SOURCE
src/a.cpp
)
不管我做什么,编译都会失败,并出现以下变化
a.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __cdecl A::metaObject(void)const
" (?metaObject@A@@UEBAPEBUQMetaObject@@XZ) [C:\Users\me\AppData\Local\Temp\subclass\build\proj.vcxproj]
a.obj : error LNK2001: unresolved external symbol "public: virtual void * __cdecl A::qt_metacast(char const *)" (?qt_metacast@A
@@UEAAPEAXPEBD@Z) [C:\Users\me\AppData\Local\Temp\subclass\build\proj.vcxproj]
a.obj : error LNK2001: unresolved external symbol "public: virtual int __cdecl A::qt_metacall(enum QMetaObject::Call,int,void *
*)" (?qt_metacall@A@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z) [C:\Users\me\AppData\Local\Temp\subclass\build\proj.vcxproj]
C:\Users\me\AppData\Local\Temp\subclass\build\Debug\proj.exe : fatal error LNK1120: 3 unresolved externals [C:\Users\me\Ap
pData\Local\Temp\subclass\build\proj.vcxproj]
我不知道是否需要设置一些额外的东西才能使 CMake 工作或者问题是什么。This https://stackoverflow.com/questions/25989448/implementing-qt-project-through-cmake答案说 CMake 在此配置(不同文件夹中的文件)上不能很好地工作,但也许有办法吗?