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I ran cmake and make on Box2D with success but when I try to run the Testbed the text below is displayed in the terminal but nothing else happens.
freeglut (./Testbed):
And after this I get back the prompt. Looks like OpenGL/freeglut is not working properly because the HelloWorld is working.
The system is ubuntu 12.04
The solution was super simple, but I needed a sleep to solve it. I reinstalled the graphics driver and it works.
I logged out and logged in again, the problem is gone.
I am using Mac. Actually I installed XQuartz to solve the problem
'GL/gl.h' file not found
and then running the built binary give me the error
freeglut (./Testbed): failed to open display ''
Then I remember after installing XQuartz, there's message asking me to log out to make it take effect. And after I logging back, the built binary can run.
:)
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I was programming in C++ a small program using QMultiMedia and QAudioOutput.
I compile and run my program in Qt (6.4) without error however when I run my program in File Explorer, when all DLLs are present, I get this error:
'could not load multimedia backend'"
QtMultimedia is not currently supported on this platform or compiler.'
So I started my research and I found several solutions however I did not understand their explanations very well (I start ...).
Here are the links I found:
-> Qt forum
-> Bugreports
-> CSDN
I tried to copy all the DLLs in mingw/bin in my folder or there is my .exe, I also copied the multimedia plugin (from mingw/plugins) to my folder or there is my .exe.
I'm on Windows 10 22h2.
Could you give me a clearer explanation? I would be very grateful.
Kind regards
Albin
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I've made a simple program in c++ and SDL that utilizes both SDL_Mixer and SDL_Image. However when I try to run the .exe in the debug folder I receive a black screen with no sound or images despite the program working quite properly in Visual Studio. All the dll's are where they should be and I've made sure everything should work. So why am I receiving a black screen instead of my program. Thanks.
I receive ... no ... images despite the program working quite properly in Visual Studio.
If you're using relative paths to load external resources like images then verify your program's working directory matches what it is when Visual Studio launches it.
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Complete noob right here, I'm learning c++ and I saw some tutorial somewhere with instructions to compile the Qt application example from the command line, then I noticed the path from the tutorial was not correct, I want to learn how to compile Qt from command line, and maybe even do some makefiles to automate the process, at least I want to get started ...It seems like the qt libraries are already installed within my system since it is using the KDE desktop environment, but I don't know how should I link or what paths should I include as arguments. Please guide me, remember I'm a complety noob but I really want to learn.
This is the tutorial I'm talking about http://zetcode.com/gui/qt5/introduction/
When you build, Qt Creator does three things only: it invokes qmake, then make, then runs the target. That's all.
Suppose your project is in ~/src/project. Here's how you would build it properly using a shadow build folder:
$ mkdir -p ~/src/project-build
$ cd ~/src/project-build
$ qmake ~/src/project
$ make -j
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I'm new and trying to get on learning the C++ language but have so far been unable to find how to create an executable file. And whenever I find even close to a solution (although I can no longer seem to find the site that I found one at) I cannot seem to find the tabs or sub tabs that they say to look under. If anyone versed in Visual Studio 2015 could help me find out how to do this it would be greatly appreciated.
You are looking for "Build" or "Build Solution".
And (most likely) you are working within a "Debug configuration", so the .EXE file will be buried in a "Debug" subdirectory of your Project's directory.
Building in Visual Studio
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I'm attempting to get Qt setup to run a simple hello world example, but I can't get the compilation setup right for the IDE (QtCreator). When I attempt to build by pressing the build button, I am getting the following error message:
Qt creator needs a compiler setup to build. Configure a compiler in the kit options
So I noticed that I had nothing setup for the compiler. I then downloaded a MinGW compiler and it seems the IDE managed to recognize it automatically. Still, when I attempt to build I am getting the same error message.
The truth is that I really don't know the process of compilation either from the command line or in other IDEs. I've read that there might be an issue with paths? I'm running on Windows. I would be extremely grateful if someone could explain what I may be doing wrong and what issue I may be having with building in QtCreator.
You will need to do the following steps for QtCreator:
1) Go to Settings > Build and Run > Kits.
2) Check if the auto-detection is correct. It is probably not if you have issues, so you will need to either set up manually or rreinstall QtCreator to see if the problem goes away. If it is not detected, you will have a read exclamation mark.
3) Add a new Kit.
4) Type a name.
5) You need to choose the proper "Qt version".
6) You need to choose the compiler.
7) Select the "Make Default" option.
As for command line, you should be able to do something like this to build a simple dummy main.cpp:
main.cpp
int main() {}
and then you can run the following commands in the (msys/cygwin/etc) prompt:
qmake -project && qmake && make