Qtbug52605 cannot build shared library with static qt. Statically building with qt creator on linux so, you have developed a nice app using qt library with qt creator and now you want to share it or deliver it to a client, but you dont want to make them install the whole qt library in their computer. The qt virtual keyboard can be built for linux desktopx11, windows desktop or boot2qt targets. Qt virtual keyboard provides implementations of plaininputmethod, multitapinputmethod and hunspellinputmethod. How to create a library with qt and use it in an application.
Static builds ease the process of app deployment under linux cause it is quite complex much more complex than windows and mac os x so without further ado. If you are unsure what architecture your system is running, you can run the linux command arch and examine the output. When a c program is compiled, the compiler generates object code. To simplify the situation, lets say that there are 2 files. Building statically on linux still depends on glibc as a dynamic library, this can cause a problem on earlier linuxes because they do not have the later ones available. This process, and the resulting standalone file, is known as a static build of the program. Hi please be aware that using qt as static library requires you to 1. Building qt revolves around using configure to configure qt for a particular platform with a particular set of qt features or modules. Linking icu libs to static qt build fails in configuration. Deployment of dynamically linked qt applications always was is not a trivial task. When passing icu flag to a static qt build, the configuration tests step fails with. Oct 12, 2016 the file qt unified linux n is the 32bit installer and qt unified linux n is the 64bit version. To configure your qt application to be built with static qt version, you need to call qt 5. Building qt virtual keyboard qt virtual keyboard 5.
If static static libgcc is added to the link line then this hits a problem with egl and gl, using noopengl to get around that does not help because then xcb fails in the. This file must be located within a specific subdirectory by default, platforms under your distribution directory. Static builds ease the process of app deployment under linux cause it. Linuxbuild from source does not install libxcbstatic. The commercial qt license gives you the full rights to create and distribute software on your own terms without any. You have to download and compile qt from source and pass in the static flag to get it to let you build your own static binaries. Qts support for different linux platforms is extensive and mature. It is a real time gm synthesizer without needing external soundfonts, using embedded samples instead. In this post, aimed at developers with novicelevel qt skills, well look at how you can build qt yourself from source code. Qt pronounced cute is a free and opensource widget toolkit for creating graphical user interfaces as well as crossplatform applications that run on various software and hardware platforms such as linux, windows, macos, android or embedded systems with little or no change in the underlying codebase while still being a native application. It also can used inside qtcreator to act as a plugin for static analysis tools putting reported issues into qtcreator issues pane. Linux linking archive static library with shared dynamic. Linking to a static library gives unresolved symbol. This script is typically run from the windows explorer.
Compile with dynamic qt libraries and static gcc libraries. To download and install qt for linux, follow the instructions on the getting started with qt page. Libraries, a static library contains object code linked with an. Building qt static libraries computer vision with opencv 3 and qt5. Assume that you have a resources file with file name as myresources. Qt installation alternatives the installation of qt presents several challenges and choices.
But it is quite easy to be lost with the huge list of parameters we should find. Getting started with qt and qt creator on linux ics. The qt package provides the qt pronounced cute crossplatform application development framework used in the development of gui programs. First contains a pro file for my console application and another project which contains a pro file for my static library. Building statically on linux still depends on glibc as a. For this purpose, we provide a custom sdk licensing option. How can i build fully static qt application in linux.
To use static linking, qt must be built with the static configuration option. In my case it was the same for mac and linux, but for windows i had. The second part is about creating and using a static library. If that is the case then you can just add the following code to your qmake. If you are making your qt gui application using opengl es 1. It contains all the qt apis and the qt creator ide for seamless crossplatform development qt for application development is duallicensed under commercial and open source licenses. Qt is the fastest and smartest way to produce industryleading software that users love. How to create a library with qt and use it in an application qt wiki. In contrast to the shared library example, you dont need to set up anything special for exporting and importing symbols in your.
It requires a separate compilation step, which makes the build process much more complicated when compared with most other libraries. Build qt statically for linux in this post ill describe how to build a static version of qt under linux ubuntu flavor and i will use qt 5. Qt red hat enterprise linux 6 red hat customer portal. When creating a static library you need to specify the staticlib option to config in the. How to configure qt to use opencv static build in linux first of all i assume you have seen this post which describes how to build opencv statically for linux. Qt for application development lets you create applications for desktop and mobile platforms. The first module is a static library for create and manipulate the algoritm of neural network, the second module is an assistent gui for the creation and configuration of the neural network, finaly the mainwindow is the integrator of them all. Linking to static builds of qt the devicespecific sysroots in boot to qt come with a dynamically linked version of qt libraries. The documentation explains how to use pixelmaestro studio and its various features. We assume that you already have installed qt as a shared library, which is the default when installing qt, in the c.
In previous blogs i have covered installing qt and qt creator on windows and on linux using the qt installer and prebuilt binaries. Building statically on linux still depends on glibc. Then, you should initialize this in the app as given below. For more information on how to build qt, see the installation documentation. Qt pronounced cute is a free and opensource widget toolkit for creating graphical user interfaces as well as crossplatform applications that run on various software and hardware platforms such as linux, windows, macos, android or embedded systems with little or no change in the underlying codebase while still being a native application with native capabilities and speed. Static libraries can both be be built in both windows and centos without issue. This almost forces use of qtcreator or a textual only editor like vim. Distributed under the terms of the gnu lesser general public license among others, qt is free and open source software. If both packages are installed on one system, the only methods to manage which set of programs is used is to either control the users path or to rename files either. For more information, see qt for linux requirements and requirements for. To configure your qt application to be built with static qt version, you need to call qt5. Qt is a crossplatform application framework that is used for developing application software that can be run on various software and hardware platforms with little or no change in the underlying codebase. How to configure qt to use opencv static build in linux amin.
Static linking and static libraries is the result of the linker making copy of all used. How do i build a static library and executable with qt. Sep 29, 20 this feature is not available right now. If you really built qt as static libraries which you need to do yourself since the official precompiled qt binaries are always shared and if you link your application against all the relevant static libraries, then the resulting executable wont depend on any qt dlls at runtime.
Although, if you wont set them, it doesnt mean that you wont have those libraries in your build they just will be included with default values. Users of older hpsdr hardware may need to make slight variations such as configuring usb in virtualbox, specifying different command line arguments to the automatically started server commands, etc, but you wont have to build the software, or install linux, or get another computer just to run the ghpsdr3alex server software. All qt gui applications require a plugin that implements the qt platform abstractionqpa layer in qt 5. Complicating the qt installation is the fact that there are two versions, qt4 and qt5, that have executable programs with identical names. Before you start to build a static qt desktop library, you must know that for now you will have a dependence with msvc redistributable. If static staticlibgcc is added to the link line then this hits a problem with egl and gl, using noopengl to get around that does not help because then xcb fails in the. Qt crossplatform software development for embedded.
Examples of static libraries libraries which are statically linked are. In some cases, using static linking may be preferable. Download the latest version of pixelmaestro studio from the releases page. By using this method, an update can be made without overwriting a previous installation and users can easily revert to a previous version by changing one symbolic. To escape this you must replace md d build flag with mt d i will not recommend you use it, because it can cause runtime errors, etc. All you need to do is to build qt and your application in release mode, following the procedures described in this documentation.
For building qt without opengl es support, follow this procedure. So, to put it simply, if you want to use the static qt libraries, you must build them on your own using their source codes. To learn more about the pixelmaestro library itself, visit the repository or check out the documentation. Build a static library to prevent simple apps with big dependencies.
Aside from being a popular widget toolkit, qt is also used for developing nongui programs such as console tools and servers. For linux x11, the name of the platform plugin is libqxcb. Due to the proliferation of unix systems such as commercial unixes, linux distributions, and so on, deployment on unix is a complex topic. If you are utilizing resources in your static library you should import them in your application as well. Im trying to follow the instructions for building qt 5. In this case, the qt licensee is not just using qt libraries and tools for their own software distribution but actually distributing a qt based sdk to a number of software developers that then become users of qt librariestools themselves. They help link your code to the library and is needed when you build your file. What i did in the past i just copied the entire set of qt libraries to the. The advantage of installing qt in a custom directory such as opt qt 4. Everything you need for your entire software development life cycle. At last, lets build qt statically declaration of var. Core options section refers to 3rdparty libraries, and quite often i see in different places people putting options like qtzlib, qtlibpng and so on for configure. Also to use static on all platforms, you will need to build qt as static lib on all platforms.
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