I am developing a project in QT, when I want to use Windeployqt to wrap my exe.
error:Warning: Unable to read \mkspecs\qconfig.pri comes out
I execute Eindeployqt in "QT5.1.1 for Desktop(Mingw 4.8.3)", I checked the qconfig.pri exsited in
C:\Qt\Qt5.1.1\5.1.1\mingw48_32\mkspecs\qconfig.pri
I have added environment variable, can anyone help on this?
Usually you would do this with environment variable
QMAKESPEC=C:\SOMEPATH\qt\mkspecs\win32-g++
or in your case probably:
QMAKESPEC=C:\Qt\Qt5.1.1\5.1.1\mingw48_32\mkspecs
though normally it should be a folder below mkspecs specifying your platform (win32-g++ in my first example).
The windeploy tool will use the paths provided from qmake.
Assuming that you are in the bin folder of your qt installation.
All "important" paths can be seen with:
qmake -query
In your case you will see that all paths have the wrong location.
You have to add a qt.conf file.
https://doc.qt.io/qt-5/qt-conf.html
with the following content:
[Paths]
Prefix = ..
Now, running qmake -query should return correct paths. Also the windeploy tool should be able to find the correct paths.
Related
Question
a) How do we add library paths where the project should look for depended libraries in Qt Creator?
b) How are the settings in project >> Run >> Build Environment related to similar in .pro file? Does the environment variable listed there applies to .pro file as well (well they don't) so what are they exactly?
Context/Details:
Visual Studio has a various environment variables for folders where a project looks for include files, library files or executable files etc. This is rather confusing in Qt Creator and I havne't seen good documentation on it.
The only thing which is obvious is INCLUDEPATHvariable which points to the directories where to look for the include files (.h)
However how do I set the library paths, the path where it should look for dependent libraries/dlls etc? I can specify the exact library with LIBS variable in .pro file, there don't seem to equivalent of LIBPATH variable where it should look for other libraries if not found in current folder.
I have worked around this be adding library path the following way basically using LIBS variable but dropping the library file name and that seems to work and add the path but I don't see this documented anywhere.
LIBS += -L"$$_PRO_FILE_PWD_/Xerces/bin/"
But what makes things more interesting is the settings in Projects >> select 'Run' from current configuration and expand the Run Environment settings.
''
Here there is LIB variable and LIBPATH variable but there are clearly not .pro environment available. It also says here that these settings are local to user and saved in .pro.user file which perhaps suggest it's a different way to set but it doesn't say how to set them in .pro file but it does suggest to set them there if want to apply for all users!
Likewise there are DEPENDPATH AND VPATH and it is not really clearly what they are used for.
I don't have enough Rep to add comments to your question, So am adding my comment in form of answer. I am pretty new to Qt and have been developing Qt GUI application on Linux.
I set this LD_LIBRARY_PATH environment variable with the path to my Qt libraries. Am not sure how much it will be helpful to you since you are using visual studio on windows.
in Projects property go to Build Environment and add a variable with the libs path, example NAME_LIBPATH. So in the .pro file add the following:
# your lib configuration
LIBS += -L$$(NAME_LIBPATH) \
-llibname
I just installed ahven, but if I compile a testprogram with Ahven.Framework,
I always get a compiler error:
file "ahven.ads" not found
My files for ahven are just here:
/opt/ada/include/ahven/ahven.ads
/usr/share/ada/adainclude/ahven/ahven.ads
how can I tell gnat where to search?
Edit:
I'm using gnatmake on Linux, without any project file.
There's an ahven.gpr file, which should take care of the dependencies. Find where that file was placed, and then either add a reference to it in your project's .gpr file, or if you're using the gps IDE, right-click on the project name, select Project/Dependencies, and then do "Add From File".
Assuming you are using gnatmake and a unix/linux based system, You need to add a path to your gnatmake command. To look up how to do this type gnatmake and look for the -I option in the help screen that follows. Im not sure which one of your dirs would be appropriate to include. That should be found in your ahven documentation.
I am a bit confused by the way qt handles libraries. My plan was to put the external libraries I need into the source directory, so that a do not have to install them into the system. As this doesn't seem to work (see below) I was wondering, if this is generally a bad idea or if there is some trick to it??
So I compiled the libraries and put them into /mysubdir. In the .pro-file I added
LIBS+= -L"mysubdir" -l"mylib"
I got the compiler error [projectname] Error 2 and don't know what it means.
The argument passed to -L must be an absolute path. Please give it a try with a full path, or at least -L./wcslibc. Though I'm not sure whether ./ will be recognized correctly. You can get the current path in qmake like this:
LIBS += -L$${PWD}/wcslibc -lwcs
I'm looking for the equivalent to ./configure --prefix= for qmake. Basically, I want to override the default install/deployment directory. How is this specified with command line qmake? I also use QtCreator to build a lot of my gui projects, and I'd like to know how to do the same thing while building inside of QtCreator. Is there a variable that I can manipulate in the .pro files to do this, or do I change my project settings?
Thanks!
For me, it seems that qmake PREFIX=/usr/local doesn't work
(try with the source of qtcreator)
So the solution is to use qmake normally, but then, you do
make
INSTALL_ROOT=/usr/local make install
I've found the solution to this, and it is just as easy as specifying the --prefix option to configure.
For qmake on the command line, you simpy add a PREFIX= parameter:
qmake PREFIX=/usr/local
There are two ways to do this in QtCreator. First, you could change your .pro file to include an explicit PREFIX variable definition. However, this is not recommended, as the prefix is a preference specific to each user, and it is preferable to keep the distributed project files generic. A better way to do this, is in your own project settings. Simply go to the build configuration that you are using, expand the qmake settings, and add PREFIX= to the additional arguments.
how can I change Qt install path after I building it ?
Example : qmake.exe search binaries to original install path, how can I change/redefine it ?
Thanks.
Edit : I finally found this patch to apply to Qt :
http://ftp-developpez.com/qt/binaires/win32/patcher/QtPatcher.7z
http://ftp-developpez.com/qt/binaires/win32/patcher/QtPatche_src.7z
I was looking into this and found a way that works (in qt 4.7.2) by customizing qt with a qt.conf file.
In my case, I added a qt4-4.7.2/bin/qt.conf (I think it must be in the same place as the qmake executable)
With the following contents:
[Paths]
Prefix = c:/my_path/to/qt4-4.7.2
and the qmake -query started returning the proper paths!
See: http://qt-project.org/doc/qt-5.0/qtdoc/qt-conf.html for more details
You can change path to binaries and many other hardcoded paths in qmake using qmake -set command.
See Configuring qmake's Environment for details.
I can answer it for windows, not so sure about others. Remove the path variables if any present in the environmental variable PATH.
In Qt-Creator goto,
Tools->Options->Qt4->Qt Versions
In the right hand side area, you will find Auto- Detected and Manual. Under Manual add a new entry by clicking the + symbol in the far right. Specify the QMake location by clicking Browse . Change the Default Qt Version to your newly specified Version. Of course, you have to re -build the application. Hope that it helps.
On Unix/Linux:
You can also use LD_LIBRARY_PATH+PATH for workarounds. But still, some defaults are hardcoded in the code, yes. A rebuild is a must.
On unix you can make a symbolic link, otherwise you probably need to rebuild it
This worked for me with Qt 5.15.2:
cd ~/Qt/Tools/QtCreator/share/qtcreator/QtProject
grep -inr '<olduser>' | cut -d: -f1 | xargs sed -i 's/<olduser>/<newuser>/g'
Replace <olduser> and <newuser> obviously.