I’ve produced a C++ program in Eclipse running on Redhat, which compiles and runs fine through Eclipse.
I thought that to run it separately to Eclipse you use the build artifact which is in the directory set via the project’s properties.
However this executable doesn’t run (I know it’s an executable as I’ve set it to be an executable via the project’s properties and it shows up as such via the ls command and the file explorer).
When attempting to run it using the executable’s name, I get the error:
bash: <filename>: command not found
When attempting to run it as a bash file:
<filename>: <filename>: cannot execute binary file
And when running it with "./" before the file name, nothing happens. Nothing new appears in the running processes and the terminal just goes to the next line as though I’d just pressed enter with no command.
Any help?
You've more or less figure out the first error yourself. when you just run <filename> , it is not in your PATH environment variable, so you get "command not found". You have to give a full or relative path when to the program in order to run it, even if you're in the same directory as the program - you run it with ./<filename>
When you do run your program, it appears to just exit as soon as you start it - we can't help much with that without knowing what the program does or see some code.
You can do some debugging, e.g. after the program just exits run echo $? to see if it exited with a particular exit value, or run your program using the strace tool to see what it does (or do it the usual way, insert printf debugging, or debug it with gdb)
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I attempted to follow through on VS Code's method on making C++ code work on their editor. I did this successfully on my laptop but when I tried compiling it, I was met with the error:
* Executing task: C/C++: g++.exe build active file
Starting build...
C:\msys64\mingw64\bin\g++.exe -fdiagnostics-color=always -g "C:\Users\salty\Documents\Programming\C++ Scripts\myProgram\main.cpp" -o "C:\Users\salty\Documents\Programming\C++ Scripts\myProgram\main.exe"
'cmd' is not recognized as an internal or external command,
operable program or batch file.
Build finished with error(s).
* The terminal process failed to launch (exit code: -1).
* Terminal will be reused by tasks, press any key to close it.
This is the entire error message plus extra things in my editor.
If I try and copy and paste the command in the message into Windows Power Shell, it actually works (New .exe file appeared in the correct directory and runs without fault).
These are my environment variables for User, and these are my System variables.
I've tried uninstalling and re-installing and changing the paths around. I'm new to C++ programming and how compilers work in general, but I'm not sure why VS Studio says it doesn't recognize cmd among others it could've not recognized.
Why is it giving me this error?
Edit: I believe I didn't include a return 0; line in the program. Correcting this did not fix the issue.
I am not sure what I poked into place or if I just was too incompetent to realize something, however adding %SystemRoot%\system32 to my PSModulePath environment variables somehow fixed the issue, and since that action I have yet to replicate the compile error.
I don't know if adding that variable to my environments permanently fixed it or VS Studio needed a moment to process some things. Thanks anyways!
I installed flatpak using guix, but it segfaulted on startup. I wanted to debug it, but guix installs a wrapper script for flatpak, so I get this error when trying to run it under gdb:
"/home/user/.guix-profile/bin/flatpak": not in executable format: file format not recognized
and I tried to edit the wrapper script to call gdb, but this wrapper script is not even editable by root, because it is owned by root and has read-only permissions.
Simply copy the script to your current working directory:
cp /home/user/.guix-profile/bin/flatpak .
Mark it as writable:
chmod +w flatpak
Edit the script with your favourite text editor, to replace the string exec -a with exec gdb --args.
And finally, run it with any arguments you provided before, when it misbehaved:
./flatpak remote-add flathub https://flathub.org/repo/flathub.flatpakrepo
In this particular case, this wasn't immediately super-useful, because a debug symbol output hasn't been built for this package. But at least I could get a backtrace out of gdb.
I get the following error:
Exception occurred executing command line.
Cannot run program "C:/OMNEST-5.5.1/samples/enera/lteAdvanced/enera.exe" (in directory "C:\OMNEST-5.5.1\samples\enera\lte"): CreateProcess error=2, The System cannot find the file.
I already built the project many times. I have tried to make a simplier already given example from omnet just to check if this is working. It is working. But if I copy this example in my Project it also doesn't work, so there is sth wrong with my Project file. But it seems to be correct. I just have one Connection and kept it really really simple. But it doesn't work. I have installed Omnest and inet correctly.
The most likely cause is that the EXE file cannot find the omnet++ dynamic libraries it tries the load. And the most likely reason is that you are trying to execute the executable from a CMD prompt instead of from the shell provided by the mingwenv.cmd script.
Everything you do in OMNeT++ (including starting the simulations) must be run from the mingwenv shell.
I wrote a simple C++ program that requires some input to run. In the terminal I simply run in ./myProgram < fileWithData.txt. However I could not figure out how to specify and input file for the target executed in Xcode. I used the command line project. Of course I could use a different target, for example run Terminal.app and then pass it the executable with the input file but then I can no longer debug it.
This question: Cannot get lldb to read file input explains how to set the input path in lldb, but I could not find a way to specify lldb commands that are executed before the process is started.
I don't think there's a way to do this entirely from within Xcode. However if you set the Run Scheme in Xcode to the launch mode "Wait for executable to be launched," hit run, and then run your program from Terminal.app with the appropriate piping, the Xcode-embedded lldb will connect to it.
I created a c++ programm that works with ros. The first step would be to open a roscore in a terminal and move on from there. I do so with system("roscore &");
I compiled my file and can run it just fine with ./file.
However, I want to be able to run it as an application (double click). I created a .desktop file and the program shows up in my application list. When i start it though, all I get is a terminal that opens with the message
sh: 1: roscore: not found
etc.
The same applies for the roslaunch commands. I also fork and exec a roslaunch command, which does not work as well.
I tried system("ls"); which worked. All cout messages work as well.
Any idea what is wrong here?
roscore executable is not located in std paths (/bin:/usr/bin:). Use the absolute path - system("/path/to/roscore &")