blocks|key|1356335|text|sudo+apt+install+qt5-default为我工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1356336|$+apt+show+qt5-default|code-block|syntax|javascript|1356337|告诉我们|1356338|1356339|这个包将Qt5设置为使用开发二进制文件时使用的默认Qt版本。它提供了qtchooser的默认配置，但不会阻止使用替代的Qt安装。|blockquote|1356340|1356341|entityMap^0|0|S|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|X|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|Z|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|10|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|S|$]]

<code>sudo apt install qt5-default</code> works for me.
<pre><code>$ apt show qt5-default</pre></code>
tells that
<blockquote>
This package sets Qt 5 to be the default Qt version to be used when using
development binaries like qmake. It provides a default configuration for
qtchooser, but does not prevent alternative Qt installations from being used.
</blockquote>

blocks|key|360304|text|您可以使用which+qmake检查qmake的路径。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|360305|考虑安装qt4-default或qt5-default取决于您想要使用的qt版本。|360306|您还可以使用qtchooser+-一个用于在Qt开发二进制版本之间进行选择的包装器。|360307|entityMap|0|LINK|mutability|MUTABLE|url|http://manpages.ubuntu.com/manpages/utopic/man1/qtchooser.1.html^0|5|B|0|4|B|G|B|0|6|9|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@$9|10|A|11|1|12]]|E|$]]|$1|J|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]]]

You could check path to qmake using <code>which qmake</code>.

Consider install <code>qt4-default</code> or <code>qt5-default</code> depends what version of qt you want use.

You could also use <a href="http://manpages.ubuntu.com/manpages/utopic/man1/qtchooser.1.html">qtchooser</a> - a wrapper used to select between Qt development binary versions.

blocks|key|361018|text|对于我这种情况的其他人，解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|361019|qmake+-qt=qt5|code-block|syntax|javascript|361020|这是在安装qt5-qmake之后的Ubuntu+14.04上的。qmake是一个指向带有-qt参数的qtchooser的符号链接。|361021|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For others in my situation, the solution was:

<pre><code>qmake -qt=qt5
</code></pre>

This was on Ubuntu 14.04 after install qt5-qmake. qmake was a symlink to qtchooser which takes the -qt argument.

blocks|key|1503506|text|作为Debian+Qt的维护者，请允许我建议您不要使用qtx-default。请阅读qtchooser的手册页，那里描述了解决方案。如果您对打包应用程序感兴趣，还可以查看this+blog+post+I+made+explaining+how+to+do+it|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1503507|#+method+1
QT_SELECT=qt5+qmake

#+method+2:
export+QT_SELECT=qt5
qmake
...+more+qt+commands+here

#+method+3:
make+-qt5|code-block|syntax|javascript|1503508|要使用Qt4，只需将qt5替换为qt4|style|CODE|1503509|默认更新20210202:从Debian11(牛眼)开始，qtx-包不再存在。Ubuntu也是如此，但我不知道具体是哪个版本。如果你知道有一个包仍然有依赖关系(主要是非Debian官方包)，请提交一个bug。Wiki页面也是如此，等等。|1503510|entityMap|0|LINK|mutability|MUTABLE|url|http://perezmeyer.blogspot.com.ar/2013/08/qt-in-debian-using-qt4-andor-qt5-in.html^0|2D|19|0|0|0|A|3|G|3|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]|$A|14|B|15|K|L]]|9|@]|C|$]]|$1|M|3|N|5|6|7|16|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

As Debian Qt's maintainer please allow me to suggest you to not use qtx-default. Please read qtchooser's man page, the solution is described there. If you are interested in packaging an app you can also take a look at <a href="http://perezmeyer.blogspot.com.ar/2013/08/qt-in-debian-using-qt4-andor-qt5-in.html" rel="noreferrer">this blog post I made explaining how to do it</a>
<pre><code># method 1
QT_SELECT=qt5 qmake

# method 2:
export QT_SELECT=qt5
qmake
... more qt commands here

# method 3:
make -qt5
</code></pre>
To use Qt 4, just replace the <code>qt5</code> with <code>qt4</code>
Update 20210202: starting from Debian 11 (bullseye) the packages qtx-default do not longer exist. Same goes for Ubuntu, but I don't know in which specific version. If you know of a package that still has the dependency (mostly non-Debian official packages) please file a bug. Same goes for Wiki pages, etc.

blocks|key|3481129|text|我在构建jasmine-headless-webkit+Ruby+gem时遇到了这个问题。尽管已经安装了qt4，但qmake+(qtchooser的符号链接)坚持不知道安装了QT。当被直接询问时，它能够列出qt4。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3481130|这让一切变得更好：|3481131|export+QT_SELECT=qt4|code-block|syntax|javascript|3481132|然后，qtchooser知道使用qmake-qt4，依此类推。|3481133|entityMap^0|1L|5|1S|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

I had this problem building jasmine-headless-webkit Ruby gem. Despite having qt4 installed, <code>qmake</code> (a symlink to <code>qtchooser</code>) insisted it didn't know about a QT installation. OTOH, it was able to list qt4 when asked directly.

This made everything better:

<pre><code>export QT_SELECT=qt4
</code></pre>

qtchooser then knew to use qmake-qt4, and so on.

blocks|key|1356419|text|搜索哪里是qmake-qt4|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1356420|which+qmake-qt4|code-block|syntax|javascript|1356421|例如，qmake-qt4位于以下路径中：|1356422|/usr/bin/qmake-qt4|1356423|创建符号链接：|1356424|cd+/usr/local/sbin/
ln+-s+/usr/bin/qmake-qt4+.
mv+qmake-qt4+qmake|1356425|问候|1356426|entityMap^0|5|9|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|14|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

Search where is qmake-qt4:

<pre><code>which qmake-qt4
</code></pre>

For example qmake-qt4 is in this path:

<pre><code>/usr/bin/qmake-qt4
</code></pre>

Create symbolic link:

<pre><code>cd /usr/local/sbin/
ln -s /usr/bin/qmake-qt4 .
mv qmake-qt4 qmake
</code></pre>

Regards

blocks|key|1503636|text|使用以下命令安装|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1503637|+qt：|unordered-list-item|1503638|1503639|sudo+apt+install+qt5-qmake|1503640|1503641|打开~/.bashrc文件：|offset|length|style|CODE|1503642|1503643|vim+~/.bashrc|1503644|1503645|将以下路径添加到~/.bashrc文件：|1503646|1503647|导出PATH="/opt/Qt/5.15.1/gcc_64/bin/:$PATH"|1503648|在当前外壳程序中|1503649|Execute/load一个~/.bashrc文件|1503650|1503651|源~/.bashrc`|1503652|1503653|使用下面的qmake命令立即尝试版本：|1503654|1503655|qmake+--version|1503656|entityMap^0|0|0|0|0|0|2|9|0|0|0|0|8|9|0|0|0|0|E|9|0|0|0|0|5|5|0|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1D|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1F|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1H|8|@$K|1I|L|1J|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1L|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1N|8|@$K|1O|L|1P|M|N]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1R|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1S|8|@]|9|@]|A|$]]|$1|Z|3|10|5|D|7|1T|8|@$K|1U|L|1V|M|N]]|9|@]|A|$]]|$1|11|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|1X|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|15|3|16|5|D|7|1Z|8|@$K|20|L|21|M|N]]|9|@]|A|$]]|$1|17|3|-4|5|6|7|22|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|23|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|24|8|@]|9|@]|A|$]]]|1B|$]]

<ul>
<li>Install qt using:
<pre><code>sudo apt install qt5-qmake
</code></pre>
</li>
<li>Open <code>~/.bashrc</code> file:
<pre><code>vim ~/.bashrc
</code></pre>
</li>
<li>Added the path below to the <code>~/.bashrc</code> file:
<pre><code>export PATH=&quot;/opt/Qt/5.15.1/gcc_64/bin/:$PATH&quot;
</code></pre>
</li>
<li>Execute/load a <code>~/.bashrc</code> file in your current shell
<pre><code>source ~/.bashrc`
</code></pre>
</li>
<li>Try now <code>qmake</code> by using the version command below:
<pre><code>qmake --version
</code></pre>
</li>
</ul>

blocks|key|360960|text|我已经安装了qt4。我发现使用下面的路径对我来说很有效，尽管'which+qmake‘返回了/usr/bin/qmake，这只是一个到qtchooser的链接。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|360961|下面的路径适用于我，在64位系统上。从以下位置的完整路径运行：|360962|/usr/lib/x86_64-linux-gnu/qt4/bin/qmake|code-block|syntax|javascript|360963|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I have qt4 installed. I found that using the following path worked for me, despite 'which qmake' returning /usr/bin/qmake, which is just a link to qtchooser anyway.

The following path works for me, on a 64 bit system. Running from the full path of:

<pre><code>/usr/lib/x86_64-linux-gnu/qt4/bin/qmake
</code></pre>

blocks|key|361049|text|指向所需版本的符号链接，全局定义：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|361050|sudo+ln+-s+/usr/bin/qmake-qt5+/usr/bin/qmake|code-block|syntax|javascript|361051|..。或每个用户：|361052|sudo+ln+-s+/usr/bin/qmake-qt5+/home/USERNAME/.local/bin/qmake|361053|..。要查看它是否工作，请执行以下操作：|361054|qmake+--version|361055|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

A symbolic link to the desired version, defined globally:

<pre><code>sudo ln -s /usr/bin/qmake-qt5 /usr/bin/qmake
</code></pre>

... or per user:

<pre><code>sudo ln -s /usr/bin/qmake-qt5 /home/USERNAME/.local/bin/qmake
</code></pre>

... to see if it works:

<pre><code>qmake --version
</code></pre>

blocks|key|1356640|text|对于我的Qt5.7，打开QtCreator，转到Tools+->+Options+->+Build+&+Run+->+Qt+Versions告诉我qmake的位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1356641|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For my Qt 5.7, open QtCreator, go to Tools -> Options -> Build &amp; Run -> Qt Versions gave me the location of qmake.

blocks|key|361095|text|如果assistant直接从终端运行，它将使用默认路径，通常是/usr/bin/assistant。我也遇到过类似的情况，为了让它正常工作，我所要做的就是找到我的qt安装bin路径的实际安装路径，比如xxx/Qt5.13.2/5.13.2/gcc_64/bin/，直接从终端输入xxx/Qt5.13.2/5.13.2/gcc_64/bin/assisstant|type|unstyled|depth|inlineStyleRanges|entityRanges|data|361096|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

if assistant is run from terminal directly, it will use the default path, usually is the /usr/bin/assistant. I had similar situation, to make it work, all I had to do is to find the actual installation of my qt installation bin path, like xxx/Qt5.13.2/5.13.2/gcc_64/bin/, type xxx/Qt5.13.2/5.13.2/gcc_64/bin/assisstant directly from terminal

I have a software in ubuntu that requires me to run qmake to generate the Makefile.

However, running qmake gives back this error,

<pre><code>qmake: could not find a Qt installation of ''
</code></pre>

I have installed what I thought to be the required packages using,

<pre><code>sudo apt-get install qt4-qmake
sudo apt-get install qt5-qmake
</code></pre>

But the error didn't go away.

Any help on this would be gladly appreciated!

qmake: could not find a Qt installation of ''

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在ubuntu中有一个软件，它需要我运行qmake来生成Makefile。但是，运行qmake会返回此错误，qmake: could not find a Qt installation of ''我已经安装了我认为是所需的软件包使用，sudo apt-get install qt4-qmakesudo apt-get install qt5-qmake但是错误并没有消失。在这方面的任何帮助都将

问qmake:找不到'‘的Qt安装
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问qmake:找不到'‘的Qt安装
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