Shadow building is a technique used to build different Qt builds of the same version for different platforms/compilers/etc. Your compiled build is in a different directory, separate from the original Qt source directory.

I&#39;ve created a shadow build for my MSVS2010 compiler. If I wanted to, I could create a new build for MinGW in a different build directory.

See the definition [here][1], and more information about configuring your build [here][2].


  [1]: http://doc.qt.io/qtcreator/creator-glossary.html#glossary-shadow-build
  [2]: http://doc.qt.io/qt-5/configure-options.html

Additional information for Mateen&#39;s answer.

&gt; By default, Qt Creator builds projects in a separate directory from the source directory, as [shadow builds][1]. This keeps the files generated for each [build and run kit][2] separate. If you only build and run with a single [kit][2], you can deselect the Shadow build checkbox.

https://doc.qt.io/qtcreator/creator-build-settings.html#qmake-build-configuration


  [1]: https://doc.qt.io/qtcreator/creator-glossary.html#glossary-shadow-build
  [2]: https://doc.qt.io/qtcreator/creator-glossary.html#glossary-buildandrun-kit

What is the difference between Java&#39;s `BufferedReader` and `InputStreamReader` classes?

What is the difference between Java&#39;s BufferedReader and InputStreamReader classes?

I have a table like this:

    group_id  name  
    --------  ----
    1         David
    1         John
    1         Alan
    1         David
    2         Julie
    2         Charles

And I want the following result:

    group_id  names
    --------  -----
    1         &#39;Alan, David, John&#39;
    2         &#39;Charles, Julie&#39;

I can use the following query:

    select group_id, 
           listagg(name, &#39;,&#39;) within group (order by name) as names
    from demotable
    group by group_id 

To get this (very similar result):

    group_id  names
    --------  -----
    1         &#39;Alan, David, David, John&#39;
    2         &#39;Charles, Julie&#39;

Any ideas how I can filter the names by uniqueness in the `LISTAGG` call?

How to use Oracle&#39;s LISTAGG function with a unique filter?

I have a simple question - what is Shadow Building? I&#39;ve seen it in Qt in Target Setup dialog, but don&#39;t know what it does or if I should use it.

It&#39;s also present in Projects tab, under General group.

Qt - &#39;Shadow Building&#39;?

<p>I have a simple question - what is Shadow Building? I've seen it in Qt in Target Setup dialog, but don't know what it does or if I should use it.</p>
<p>It's also present in Projects tab, under General group.</p>


I&#39;m writing a program in C++ using the Qt library. There is a symbolic link in my home bin directory to the executable. I would like the current working directory of my program to be the directory in which I am with my terminal (ie. the result of the `pwd` command). I saw the `QDir::currentPath()` function, but it gives back the directory where the binary is.

How can I find my current working directory?

Get current working directory in a Qt application

I want to get `QString` from another `QString`, when I know necessary indexes.
For example:
Main string: *&quot;This is a string&quot;*.
I want to create new `QString` from first 5 symbols and get *&quot;This &quot;*.   
**input :** first and last char number.  
**output :** new `QString`.

How to create it ?  

**P.S.** Not only first several letters, also from the middle of the line, for example from 5 till 8.

Qt. get part of QString

I have a qmake file generated by Qt creator.
I am modifying it but I do not manage to understand how to create a variable.

For example, I want to declare the library MYPATH as I did here:

    MYPATH = /lib/aaa/bbb
    unix:!macx:!symbian: LIBS += -L$(MYPATH)

When I run qmake I find in the generated makefile

    LIBS = ....... -L$(MYPATH) .....

But the MYPATH variable is not declared anywhere.

Does anyone know how to declare such a variable properly?

QMake - How to add and use a variable into the .pro file

How should I quit a Qt Program, e.g when loading a data file, and discovered file corruption, and user need to quit this app or re-initiate data file?

  Should I:

 1. call `exit(EXIT_FAILURE)`
 1. call `QApplication::quit()`
 1. call `QCoreApplication::quit()`

And difference between (2) and (3)?

Correct way to quit a Qt program?

I want to recursively scan a directory and all its sub-directories for files with a given extension - for example, all *.jpg files. How can you do that in Qt?


Recursively iterate over all the files in a directory and its subdirectories in Qt

I am using `ant-release` to do a 1-step build of my Android app.

My build.properties looks like this:

    application.package=xxxxx
    key.store=sonr
    key.alias=sonr labs
    key.store.password=xxxx
    key.alias.password=xxxx

When I run ant-release everything is fine except for application signing. I get the error:


    -release-prompt-for-password:
    
    -release-nosign:
         [echo] No key.store and key.alias properties found in build.properties.
         [echo] Please sign /Users/syalam/Documents/git/joeborn-sonr/sonr/bin/SONR-release-unsigned.apk manually
         [echo] and run zipalign from the Android SDK tools.
    [propertyfile] Updating property file: /Users/syalam/Documents/git/joeborn-sonr/sonr/bin/build.prop
    [propertyfile] Updating property file: /Users/syalam/Documents/git/joeborn-sonr/sonr/bin/build.prop
    [propertyfile] Updating property file: /Users/syalam/Documents/git/joeborn-sonr/sonr/bin/build.prop
    [propertyfile] Updating property file: /Users/syalam/Documents/git/joeborn-sonr/sonr/bin/build.prop

How can I resolve this?

PS. I followed this tutorial for getting my build process down http://www.androidengineer.com/2010/06/using-ant-to-automate-building-android.html



No key.store and key.alias properties found in build.properties

I am using Maven in my standalone application, and I want to package all the dependencies in my JAR file inside a library folder, as mentioned in one of the answers here:

*https://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven*

I want my final JAR file to have a library folder that contains the dependencies as JAR files, not like what the `maven-shade-plugin` that puts the dependencies in the form of folders like the Maven hierarchy in the .m2 folder.

Well, actually the current configuration does what I want, but I am having a problem with loading the JAR files when running the application. I can&#39;t load the classes.

Here&#39;s my configuration:

&lt;!-- language: xml --&gt;

    &lt;plugins&gt;

        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-dependency-plugin&lt;/artifactId&gt;
            &lt;executions&gt;
                &lt;execution&gt;
                    &lt;id&gt;copy-dependencies&lt;/id&gt;
                    &lt;phase&gt;prepare-package&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;copy-dependencies&lt;/goal&gt;
                    &lt;/goals&gt;
                    &lt;configuration&gt;
                        &lt;outputDirectory&gt;${project.build.directory}/classes/lib&lt;/outputDirectory&gt;
                        &lt;overWriteReleases&gt;false&lt;/overWriteReleases&gt;
                        &lt;overWriteSnapshots&gt;false&lt;/overWriteSnapshots&gt;
                        &lt;overWriteIfNewer&gt;true&lt;/overWriteIfNewer&gt;
                    &lt;/configuration&gt;
                &lt;/execution&gt;
            &lt;/executions&gt;
        &lt;/plugin&gt;

        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-jar-plugin&lt;/artifactId&gt;
            &lt;configuration&gt;
                &lt;archive&gt;
                    &lt;manifest&gt;
                        &lt;addClasspath&gt;true&lt;/addClasspath&gt;
                        &lt;classpathPrefix&gt;lib/&lt;/classpathPrefix&gt;
                        &lt;mainClass&gt;com.myapp.MainClass&lt;/mainClass&gt;
                    &lt;/manifest&gt;
                &lt;/archive&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;

        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
            &lt;configuration&gt;
                &lt;source&gt;1.6&lt;/source&gt;
                &lt;target&gt;1.6&lt;/target&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;

        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-dependency-plugin&lt;/artifactId&gt;
            &lt;executions&gt;
                &lt;execution&gt;
                    &lt;id&gt;install&lt;/id&gt;
                    &lt;phase&gt;install&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;sources&lt;/goal&gt;
                    &lt;/goals&gt;
                &lt;/execution&gt;
            &lt;/executions&gt;
        &lt;/plugin&gt;

        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-resources-plugin&lt;/artifactId&gt;
            &lt;version&gt;2.5&lt;/version&gt;
            &lt;configuration&gt;
                &lt;encoding&gt;UTF-8&lt;/encoding&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;

    &lt;/plugins&gt;

The project runs fine from Eclipse, and the JAR files are put in the library folder inside my final JAR file as I want, but when running the final JAR file from the target folder I always get `ClassNotFoundException`:

    Exception in thread &quot;main&quot; java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext
    Caused by: java.lang.ClassNotFoundException: org.springframework.context.ApplicationContext
            at java.net.URLClassLoader$1.run(Unknown Source)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.net.URLClassLoader.findClass(Unknown Source)
            at java.lang.ClassLoader.loadClass(Unknown Source)
            at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
            at java.lang.ClassLoader.loadClass(Unknown Source)
    Could not find the main class: com.myapp.MainClass. Program will exit.

How can I fix this exception?


How do I put all required JAR files in a library folder inside the final JAR file with Maven?

I&#39;ve done a lot of research and been unable to find an answer to this... how can I reliably find the target architecture I&#39;m compiling for, using CMake? Basically, the equivalent to QMAKE_TARGET.arch in qmake.

Most sources seem to suggest CMAKE_SYSTEM_PROCESSOR, but that&#39;s a bad solution because that will always return i386 on OS X for example, no matter whether you&#39;re compiling for i386, x86_64, ppc or ppc64.

Similarly, CMAKE_SIZEOF_VOID_P gives the pointer size of the *system*, not the target.

I understand there is CMAKE_OSX_ARCHITECTURES, but this can be empty if not set, in which case it seems to default to whatever the system is capable of. So how can I find the target architecture information?

And specifically for OS X, how can I differentiate between 32, 64, and Intel Universal?

How to detect target architecture using CMake?

In Jenkins, is there a way to give different timeouts to each or selected build step?  
Build-time plugin out gives functionality of timeout &quot;Abort the build if it&#39;s stuck&quot; on complete project, what I need is to give different timeouts for each step. This way I can make my process more efficient.

Timeout on a Build Step of Jenkins

I have a set of projects which all need to run the same series of Maven plugin executions during their builds.  I&#39;d like to avoid re-declaring all of this configuration in every project, so I made them all inherit from a parent pom &quot;template&quot; project which only contains those plugin executions (8 different mojos).  But I want those plugin executions to only run on the child projects and not on the parent project during Maven builds.

I&#39;ve tried to accomplish this four different ways, each with a side-effect I don&#39;t like.

 1. Declare the plugin executions in the parent pom&#39;s `build/plugins` element and use properties-maven-plugin to [turn on the `skip` properties on other plugins][1] in the parent project.  This didn&#39;t work because one of the plugin goals (maven-dependency-plugin:build-classpath) doesn&#39;t have a `skip` property.

 1. Declare the plugin executions in the parent pom&#39;s `build/pluginManagement` element.  Unfortunately this requires me to redeclare each of the eight plugins in the `build/plugins` element of every child project&#39;s pom like:

        &lt;plugin&gt;
            &lt;artifactId&gt;maven-assembly-plugin&lt;/artifactId&gt;
        &lt;/plugin&gt;
        ...

    This is too repetitive, and problematic if I ever need to change the plugins in the template pom.

 1. Declare the plugin executions in a profile in the parent pom which is activated by the _lack_ of a `nobuild.txt` file (which does exist in the parent pom, so the plugins don&#39;t execute there):

        &lt;profiles&gt;
            &lt;profile&gt;
                &lt;activation&gt;
                    &lt;file&gt;
                        &lt;missing&gt;nobuild.txt&lt;/missing&gt;
                    &lt;/file&gt;
                &lt;/activation&gt;
                &lt;build&gt;
                    ....
                &lt;/build&gt;
            &lt;/profile&gt;
        &lt;/profiles&gt;

    This works for the most part, except that the file path in the `missing` element seems to be based on the _current working directory_ instead of the project basedir.  This breaks some of the multimodule builds I&#39;d like to be able to do.  **Edit:** to clarify, the parent &quot;template&quot; project is actually itself a module in a multimodule project, and the build breaks when I try, for instance, to do a `mvn install` on the root.  The project structure looks like:

        + job
        |- job-core
        |- job-template
        |- job1                   inherits from job-template
        |- job2                   inherits from job-template

 1. Set up a custom lifecycle and packaging.  This seems to allow me to bind plugins to lifecycle phases, [but not specify any configuration][2].

So, is there another way to specify a bunch of Maven plugin executions that can be reused across several projects (with minimal repetition in each of those projects&#39; poms)?


  [1]: http://maven.40175.n5.nabble.com/Execution-of-plugin-in-child-poms-and-not-in-current-pom-tp4666403p4685295.html
  [2]: http://maven.40175.n5.nabble.com/writing-a-parent-pom-that-does-not-execute-its-plugins-tp4913346p4919168.html

Define Maven plugins in parent pom, but only invoke plugins in child projects

Been looking around on the web for one of these, but I&#39;m only finding node.js/ruby hosted implementations.

I&#39;m keen to have a DynamoDB app, something like that of the navicat ilk that comes with an msi installer to get running quickly.

Maybe there&#39;s a valid reason as to why one of these doesn&#39;t exist yet?

Amazon AWS DynamoDB Desktop Client - Does one exist?

I&#39;m currently mid-way through building a HTML5 application. 

I&#39;d really like to deploy this to desktop and I&#39;ve looked at solutions such as Sencha but have had no luck (I found Sencha disappointing and frustrating to work with). I&#39;d like cross platform compatibility and ease of deployment but I haven&#39;t found anything open-source or commercial that looks like it could do the job effectively.

Can anyone with some experience suggest a framework which might be suitable for packaging and deploying a HTML5 application on the desktop? An end requirement of this is that it will functional on both Mac OS and Windows - but for now Windows alone is great.

I&#39;ve considered looking into building a C# wrapper which will render the HTML5, but a solution may already exist that I&#39;ve overlooked.

I&#39;d appreciate any responses from someone with experience - the other questions relating to this on the SO don&#39;t outline the solution the &#39;asker&#39; went with.

HTML5 Desktop Wrapper/Framework

First, I&#39;m not interested in doing this professionally. I am a web developer, a coworker of mine recently left for Spotify and said he will be working mostly in JavaScript for the Spotify Desktop app. He said it uses &quot;Chrome frame&quot; and everything inside is done like a web app (HTML/JS/CSS).

As a web developer who never built anything for Desktop, this is great news. If I can use the technologies I already know and implement them inside some sort of a &quot;frame&quot; and still be able to build a windows or better yet cross platform app.

I know I didn&#39;t mention anything about the database, but even a simple hello world desktop app with web technologies would be great to get going.

So how does one go about this? Exactly what do I need/need to know?

How to develop Desktop Apps using HTML/CSS/JavaScript?

Is it possible to develop a C++ program while using HTML and CSS for the user interface? I know about programming with Javascript using a Webkit container, but I am really interested in C++ development.

I felt in love with C# WPF when I developed under Windows, but now I moved to Linux and I haven&#39;t found a good tool for using markup for interfaces. For this, I would like to mix HTML and CSS, which are very lightweight and easy to use, with C++ code, with something like WPF.

Oh, one more thing: I&#39;m looking for desktop development, not web.

How to build native C++ apps with HTML/CSS UI?

I want to generate a unique `.exe` file to execute the app or a `.msi` to install the application. How to do that?

Content Type	Original Author	Original Content on Stackoverflow
Question	xx77aBs	View Question on Stackoverflow
Solution 1 - Qt	Mateen Ulhaq	View Answer on Stackoverflow
Solution 2 - Qt	li ki	View Answer on Stackoverflow

Qt - 'Shadow Building'?

Qt Problem Overview

Qt Solutions

Solution 1 - Qt

Solution 2 - Qt

How to use Oracle's LISTAGG function with a unique filter?

What is the difference between Java's BufferedReader and InputStreamReader classes?

Attributions