What tbscope mentioned is of course possible as well. D principles use them! Re: Problem: the Application Takes very long time to build Another way to improve compilation is to build header files in smart way. If it is only possible do not include header file from other header file just add forward declaration of class which is needed.
This will speed up header file processing. Re: Problem: the Application Takes very long time to build first it is small project 6 forms and some classes i have avira anti virus but i some time build fast as expected and many time didn't build but i wait it for long time i can include my project if you interested to see it thank you for your help. Re: Problem: the Application Takes very long time to build When a project sometimes compiles fast and sometimes very slow, it most likely is not the compiler or the linker or any other tool used while building.
There is a small change it is, but most likely it is a slowdown caused by other software. An indexer running in the background might slow it down, a virus killer, other tools accessing the files the compiler and linker need, The file md5sums. The next step is to extract the files from the source archive. If you downloaded the tar. Qt is dependent on a number of tools and libraries. Others are optional and Qt will make use of them if present and disable certain features if absent.
This will occur when Qt is configured. Figuring out all of the correct dependencies to build Qt is often the hardest part of the build process. While the dependencies are typically all available as standard packages for your Linux distribution, it can take some time to identify and install all of the packages that are needed, especially on a clean system where you have never built Qt before. On Ubuntu Linux the command line tool to install packages is apt-get. For Ubuntu On a different version of Ubuntu, some of the package names will likely differ.
On a different Linux distribution you will typically need to use a different package installer program e. The next step is configuring Qt. This will identify the options of Qt that will be enabled and create the make files needed to build it.
It is initiated by running the configure shell script. While configure has many options which you can display by running configure -h , we will just use the defaults:. This will take some time, as many tests need to be run.
Here is an abbreviated version of the output I saw on my system:. At this point configure should indicate if any required dependencies are missing. A typical error message is:. You will also want to check that the Qt options you desire are enabled.
A critical one that I check for is the QPA back ends that are enabled. If you are missing dependencies, you will need to identify the Ubuntu packages which provide them, install the packages, and then run configure again. By default it also pulls in lots of libraries that you may not need.
So the first thing to try is make -j to do parallel builds. If that is still taking too long then try to slim down the libraries Qt generates. Do you need QtWebKit for instance? If you plan on using an embedded web browser in your application then you'll want it. If not then you can halve the time of your build. Type configure --help to see the options. Some useful ones that can reduce the build time are:.
If you're having to pay for the time in this Amazon instance then another option is to create a local Ubuntu machine on a spare machine or in a virtual machine and tweak the options there until you get something that works, then use that build configuration on your Amazon instance.
In Qt5, the project changed to use git submodules, so if you are building from a git checkout then the default behaviour is to clone all the submodules, which will add substantially to your build times if there are modules you don't need. There is a script init-repository that is part of the qt5 repository. You can use that to trim your local repository to only contain the submodules you need.
So for instance:. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Posted: Sun Sep 23, am Post subject:. I've had this happen on two machines in the past couple of days now. Posted: Sun Sep 23, pm Post subject:. Actually, this only worked on one of the two machines, the other one still stalls.
I don't think it's a processor thing I run emerge with nice -n 10 so it's low priority. I rather think there is some kind of a memory leak. I also noticed this build has some freakishly long command lines.
Posted: Sat Oct 20, am Post subject:. I've been able to compile 5. I ran into this configure error I hunted down 5. There are no words for the hatred I have for this package. The comments in bug I linked in that post is especially scary.
Do I stand a chance of being able to compile this? Here there is: Code:. Posted: Sat Oct 20, pm Post subject:. Thanks for the replies. The -hyphen bug I ran into was apparently just fixed.
0コメント