Qt插件：從qmake到qbs。 鏈接錯誤

Question

我有一個由兩個產品組成的.pro項目：

player.pro

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

madiaplayer.pro-DLL庫

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

imageplayer.pro-Qt插件

TEMPLATE = lib
CONFIG += plugin
LIBS *= -L<path to mediaplayer dll>
INCLUDEPATH *= mediaplayer \ <...>
DEPENDPATH *= $$INCLUDEPATH
<...>

工作正常。 但是現在我需要qbs版本。

---

我寫類似：

player.qbs

Project {
    references: [
        "mediaplayer/MediaPlayer.qbs",
        "imageplayer/ImagePlayer.qbs",
    ]
}

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.qbs

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.h

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

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

ImagePlayer.h

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

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

但是...我得到了一個非常不清楚的錯誤結果（它是ImagePlayer.dll鏈接階段）：

ImagePlayer.cpp.obj：無法解析的外部符號“ public：靜態結構QMetaObject const MediaPlayer :: staticMetaObject”（？staticMetaObject @ MediaPlayer @@ 2UQMetaObject @@ B）

moc_ImagePlayer.cpp.obj：未解析的外部符號“ public：靜態結構QMetaObject const MediaPlayer :: staticMetaObject”（？staticMetaObject @ MediaPlayer @@ 2UQMetaObject @@ B）

有人知道哪里出了問題嗎？

Answer 1

這部分看起來可疑：

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

您不太可能真的要導出此定義，因為它可能控制庫的頭文件之一中某些EXPORT預處理器令牌的值（我不確定，因為我不了解您的項目）。 只需從“導出”項中刪除此行。