使用 qmake 将 dll 安装到 2 个目标（路径）中

Question

有以下qt pro文件：

CONFIG      += plugin debug_and_release
TARGET      = $$qtLibraryTarget(WidgetBoxPlugin)
TEMPLATE    = lib
...
target.path = $$[QT_INSTALL_PLUGINS]/designer
creator_target.path = $$[QTCREATOR_BIN_PATH]/plugins/designer
INSTALLS    += target creator_target

结果 dll 文件被复制到 2 个路径（目标）中。现在由于某些原因它不起作用：qmake 不会为第二个目标生成安装（复制）脚本（QTCREATOR_BIN_PATH 已设置）。如何正确编写第二次安装以便将 dll 安装到 2 个目的地？

完整项目：https://github.com/akontsevich/WidgetBox

Answer 1

How to write a copy of my project target correctly so dll being installed into 2 destinations?

您可以尝试使用QMAKE_EXTRA_COMPILERS创建一个新的目标路径：

http://blog.qt.io/blog/2008/04/16/the-power-of-qmake/

creator_target.name = Copying the target dll to Qt Creator plugins directory as well
creator_target.input = $$qtLibraryTarget(WidgetBoxPlugin)
creator_target.path  = $$[QTCREATOR_BIN_PATH]/plugins/designer
creator_target.CONFIG += target_predeps no_link
creator_target.output = WidgetBoxPlugin.dll
QMAKE_EXTRA_COMPILERS += creator_target

INSTALLS += creator_target

另一种可能更简单的方法是始终尝试复制 post 构建，但使用 xcopy /D/Y 命令语法，如果目标存在，我们可以避免复制：

QMAKE_POST_LINK += xcopy /d/y $$qtLibraryTarget(WidgetBoxPlugin) ${QTCREATOR_BIN_PATH}/plugins/designer

此命令的问题是正确转义输入，但在 SO 上更广为人知：https://whosebug.com/search?q=QMAKE_POST_LINK

Answer 2

这里有建议： https://forum.qt.io/topic/66090/qmake-does-not-generate-2nd-install-target-in-makefile/3#

根据文档 (https://wiki.qt.io/QMake-top-level-srcdir-and-builddir) 正确的构建目录宏是 $$OUT_PWD，因此正确的安装代码是：

target.path = $$[QT_INSTALL_PLUGINS]/designer

creator_target.name = Copying the target dll to Qt Creator plugins directory as well
creator_target.input = $qtLbraryTarget(WidgetBoxPlugin)
creator_target.path  = $$(QTCREATOR_BIN_PATH)/plugins/designer
creator_target.CONFIG += no_check_exist
creator_target.output = WidgetBoxPlugin.dll
creator_target.files = $$OUT_PWD/release/WidgetBoxPlugin.dll
QMAKE_EXTRA_COMPILERS += creator_target

INSTALLS += target creator_target

唯一奇怪的是为什么 [] 括号只适用于目标而 () 对 creator_target 是必需的？

使用 qmake 将 dll 安装到 2 个目标（路径）中

Install dll into 2 targets (paths) with qmake

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