C++ Qt插件：从qmake到qbs。联动误差

我有一个.pro项目，由两个产品组成：

player.pro

TEMPLATE = subdirs
SUBDIRS = mediaplayer \
          imageplayer 
imageplayer.depends = mediaplayer

madiaplayer.pro-dll库

TEMPLATE = lib
DEFINES += MEDIAPLAYER_LIBRARY
HEADERS = MediaPlayer_global.h \ <...>
<...>

MediaPlayer.qbs

MediaPlayer {
    Group {
        qbs.install: true
        fileTagsFilter: "dynamiclibrary"
    }
    cpp.includePaths: product.sourceDirectory
    cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    Export {
        cpp.includePaths: product.sourceDirectory
        cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    }
    <...>
}

ImagePlayer {
    Depends { name: "MediaPlayer" }
    Export { Depends { name: "MediaPlayer" } }

    Group {
        qbs.install: true
        fileTagsFilter: "dynamiclibrary"
    }
    cpp.includePaths: product.sourceDirectory
    cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    Export {
        cpp.includePaths: product.sourceDirectory
        cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    }
    <...>
}

MediaPlayer{
团体{
qbs.install:true
fileTagsFilter:“dynamiclibrary”
}
cpp.includePath:product.sourceDirectory
cpp.defines:[product.name.toUpperCase（）+“_库”，]
出口{
cpp.includePath:product.sourceDirectory
cpp.defines:[product.name.toUpperCase（）+“_库”，]
}
}

ImagePlayer.qbs

MediaPlayer {
    Group {
        qbs.install: true
        fileTagsFilter: "dynamiclibrary"
    }
    cpp.includePaths: product.sourceDirectory
    cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    Export {
        cpp.includePaths: product.sourceDirectory
        cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    }
    <...>
}

ImagePlayer {
    Depends { name: "MediaPlayer" }
    Export { Depends { name: "MediaPlayer" } }

    Group {
        qbs.install: true
        fileTagsFilter: "dynamiclibrary"
    }
    cpp.includePaths: product.sourceDirectory
    cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    Export {
        cpp.includePaths: product.sourceDirectory
        cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
    }
    <...>
}

ImagePlayer{
取决于{name:“MediaPlayer”}
导出{name:“MediaPlayer”}
团体{
qbs.install:true
fileTagsFilter:“dynamiclibrary”
}
cpp.includePath:product.sourceDirectory
cpp.defines:[product.name.toUpperCase（）+“_库”，]
出口{
cpp.includePath:product.sourceDirectory
cpp.defines:[product.name.toUpperCase（）+“_库”，]
}
}

MediaPlayer.h

#include "MediaPlayer_global.h"
#include "MediaPlayerInterface.h"

class MEDIAPLAYERSHARED_EXPORT MediaPlayer : public QWidget, public MediaPlayerInterface
{
    Q_OBJECT
    Q_INTERFACES(MediaPlayerInterface)
    <...>
}

#包括“MediaPlayer_global.h”
#包括“MediaPlayerInterface.h”
类MEDIAPLAYERSHARED_导出MediaPlayer:public QWidget，public MediaPlayerInterface
{
Q_对象
Q_接口（MediaPlayerInterface）
}

ImagePlayer.h

#include "../mediaplayer/MediaPlayer.h"

class ImagePlayer : public MediaPlayer
{
    Q_OBJECT
    Q_INTERFACES(MediaPlayerInterface)
    Q_PLUGIN_METADATA(IID "org.geeksoft.qt.MediaPlayerInterface")
    <...>
}

#包括“./mediaplayer/mediaplayer.h”
类ImagePlayer:公共媒体播放器
{
Q_对象
Q_接口（MediaPlayerInterface）
Q_插件_元数据（IID“org.geeksoft.qt.MediaPlayerInterface”）
}

但是。。。我得到了一个非常不清楚的错误结果（它是ImagePlayer.dll链接阶段）：

ImagePlayer.cpp.obj:未解析的外部符号“public:static struct QMetaObject const MediaPlayer:：staticMetaObject”（？staticMetaObject@MediaPlayer@@2UQMetaObject@@B）

moc_ImagePlayer.cpp.obj:未解析的外部符号“public:static struct QMetaObject const MediaPlayer:：staticMetaObject”（？staticMetaObject@MediaPlayer@@2UQMetaObject@@B）

---

有人知道出了什么问题吗？

这部分看起来可疑：

Export {
    // ...
    cpp.defines: [ product.name.toUpperCase() + "_LIBRARY", ]
}

您不太可能真的想要导出这个define，因为它可能控制库头文件中某个导出预处理器标记的值（我不能肯定，因为我不知道您的项目）。只需从导出项中删除此行