I am relatively new in programming using the C-language. So to lay it all out, I am still kind of clueless of what is happening. Now, may I ask why I can't seem to create an exe file and run the code?
Actually, the first time I tried executing it, it worked. However, to make sure that it is working, I repeated it and then it didn't work anymore.
To make things clearer:
I use Mac
Mac OS Big Sur
In this particular case, gcc is the compiler
I also tried using Code::Blocks also prior to this; however, I have similar issues -- after I built and ran my first "hello world" program, it didn't run the same program anymore after it. I also tried reinstalling it, but it still has the same issues.
I'm really frustrated that this is happening because I cannot move on to the next lessons in my class. :(
Thank you very much! I hope someone would help a newbie here. :))
Gcc by default names executables a.out. So you can check if that file has been created by running ls a.out and looking through the results.
If it has been made, you can run it from the command line with ./a.out.
If you want to name the executables something else, then when calling gcc, add the flag -o followed by the name you want. E.g. if you want filename.c to compile to filename.exe, then you would write gcc -o filename.exe filename.c. Then you can run it from the command line with ./filename.exe. I think if you give it the .exe file extension you should also be able to run it by clicking it in the Windows file explorer.
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New to the site. I am hoping you can help me as I've been beating my head against the wall on this one for a month now.
This is for work, and we are kind of proprietary but I will try to share as much information as possible. We have MPC5674F microcontroller on our main development board. To write code before, we used Microsoft Visual Studio 2008 along with a makefile and gcc compiler to create a .s19 file that is then flashed onto the board. Before, Visual Studio would not recognize make command. I went into C:\MinGW folder and found 3 different make.exe type files. There is gnatmake.exe, mingw32-make.exe and regular make.exe in C:\MinGW\msys\1.0\bin. I also found a regular make.exe in an NXP folder from the S32Design Studio. All of those make commands give me different result. If I change one that is by MinGW, then it gets stuck in the makefile saying The system cannot find the path specified to an echo.exe command, even though I can once again go into command window and type echo and it outputs ECHO is on. If I use just make.exe from either NXP of the other folder from MinGW, it compiles without errors but there is no file output, or even the process of how it compiled. In our makefile we specify to output each file that it compiles and nothing happens. If I use gnatmake.exe It gets stuck at command gcc -c -Ietc\ -I- -x ada etc\makefile where it says there is illegal character and target_name is an Ada 2020 feature. Not sure what any of those mean.
I managed to somehow previously get this to compile before, but since then the PC (Windows 10) had to be wiped and reinstalled. Guys that have set this up are long since retired (before I started) so I am hoping you guys can help me out.
Okay so I managed to get it to work. How, I am not entirely sure. I did wind up editing my commands for linux inside the makefile to have quotes around them because Windows kept removing slashes from the path written in the makefile. Also I provided a path to the Unix utilities and the make.exe to C:\MinGW\msys\1.0\bin instead of C:\MinGW\bin. I also had to add the same path to the $Path variable in Environmental Variable The code compiles now and seems to work after flashing it onto our system. My hope now is the instructions I wrote for anyone else to do this will work and I didn't forget something.
I am very new to coding, it being only 3 weeks until I have started to learn to code. I write very small codes as of now (like only 20-30 lines, maximum 44) Whenever I write a code, then run it, as you might know, that if I have written a code for finding if the number is prime or not, I have to write in the terminal, ./prime and then press enter, then input a number.
But, when I do that in my VS code software, when I write, ./prime and then press enter, it shows:
bash: ./prime: No such file or directory.
I observed that my teacher is using that terminal in git bash, so I installed GitHub and used git bash for it, still, this problem was occurring. My brother predicted that you might not be saving the file, do that and then play it on the terminal. I even did that, but still, it was happening. And this is happening with every code I am typing, all the 44 code files.
Idk if this is happening because I have missed to download a particular file of mingw, or is there a different method to do that, for windows(my OS), because my teacher uses mac
You need to compile your code before you execute.
In terminal run command gcc prime.c -o prime and then you are good to go with ./prime
If I am to compile my code in the terminal, I would do:
cc -std=c99 -Wall -Werror ....
If I'm to run my code in the terminal I would do:
./testprogram text.txt 1000 1000
The numbers and the text file is significant to the program.
Hopefully that gives some insight into the version of c I'm using and how to execute my program. Now: how do you debug this with visual studio code? I have installed the c/c++ extension.
Every time I try to start debug it asks me to chose between two environments:
c++ (GDB/LLDB)
c++ (windows).
My first problem is that non of those two options are just plain c, but maybe I just don't know better and there isn't much difference. Never the less, I gamble on one of the environment, usually the first one, then I'm asked to pick between:
two gcc-9 build and debug active file,
one gcc build and debug active file,
and defult configuration.
I usually pick the defult config one and that leads me to the launch.json page. I put in my program directory: "${workspaceFolder}/testprogram.c" and error.. :
Unable to start debugging. Launch options string provided by the project system is invalid. Unable to determine path to debugger. Please specify the "MIDebuggerPath" option.
Nothing I've tried so far or any googling have helped so hopefully someone with a lot of experience would be able to help out here. Thanks in advance.
I'm learning how to use Data Display Debugger (DDD) for my C/C++ programs. The Help reference for DDD shows some sample outputs, including the following graphic graph / charting example. I'm trying to reproduce the exercise, but I'm having difficulty. The way it should work is I would compile cxxtest.c with debugger options, and the DDD tool would actually graph the variable array of interest during a step debugging session, in both 2D and 3D. Wow, if it works.
The cxxtest.c program is included in the DDD repository, ddd-3.3.12.tar.gz. I'm trying to compile and run that program but I keep getting stuck. I can't figure out how to generate a config.h file, so I can link in necessary support files (e.g. bool.h) to compile cxxtest.c
Files I see in the DDD repository, relating to config include:
config-info
config.h.in
config.texi
configinfo.C
configinfo.h
configure
configure.in
None of them seem to offer much help on how to generate a config.h file.
Anybody know how to generate a config.h file ?
Update: As I continue to work this one, the whole thing seems odd. The program , cxxtest.C , has a .C suffix, but there are distinctly C++ elements in there, #include <iostream> If I block the config.h thing, change the suffix to .cpp and compile I get a whole bunch of different errors. Not sure what the intent was here.
As for README content, I do see some instructions on how to compile the entire DDD tool, and it's quite lengthy. It's not clear on if preparing / configuring and compiling the DDD tool will also compile this particular test file. I guess I can wade thru the make files and scripts and see if this file every gets mentioned. (sigh!)
Actually I'm considering converting the entire file over to pure .c via rewrite. Note, the original file is visible here...
Note: I'm working in Virtualbox Ubuntu desktop for now... Ultimately I'd like to use the DDD tool to analyze key arrays in some digital signal processing (DSP) programs I'm working on.
Update #2:
I tried two different things here. First I built a C version of a file with the plot routines copied from the original cxxtest.c program. I converted all the calls to pure C. I could easily see the data in the DDD data window in text format. When I select the data set and then choose plot, I get a popup "DDD: Starting Plot... Starting gnuplot..." The system just hangs there.
Second, I did a complete clean install of the ddd tool. I had to install a few dependencies, and correct a few known bugs (e.g. #include <cstdio> ) but was successful at both $ ./configure && make and $ make check . The make check command does correctly build and compile cxxtest.c . When I run the file and do the steps to plot the dr and ir array variables, I get the same failure as above.
System hang. A search of the failure indicates this has been reported for years, apparently without resolve. Not quite sure how to proceed. This appears to be a total fail. I cannot reproduce the DDD test to plot graphical output. Anybody else make progress on this one?
Note: with this edit, I'm also removing the How do I generate config.h? from the title. That's not really the key issue here.
Anybody know how to generate a config.h file ?
Yes: just run the configure script provided. A typical sequence for building open source software is:
./configure && make
I'm currently on Windows Vista Basic.
I have recently started on Eclipse, and for that I was required to install cygwin.
After that I made an edit in the PATH environment variable in "My Computer>Properties>Advanced Settings". In order to check the functionality, I started cmd-prompt and types
C:>gcc
This gives the following output: ACCESS IS DENIED
I know it's a security permission problem, but I don't know where exactly to do the change in the security settings. Last time I tried it started showing "error-illegal operation" and some error code.
You can not use gcc in your cmd. you must use it in cygwin shell that installed when you install cygwin
You can use gcc without using the cygwin shell !!
But you will probably end up with some configuration problems,
such as not having the correct dll's in the right places.
Another common error that can occur, is if you have multiple instances
of cygwin installed, the search paths get confused and the gcc system
can't find relevant compiler or tries to use the wrong compiler.
All the same this is very possible, I've done it myself hundreds of time,
when testing compilers I have written.
You might want to try invoking 'cc1.exe' for c, or 'cc1plus.exe' for c++,
remember to copy the cygwin dll's into the same directory as cc1 or cc1plus,
Other than that it could be your user account permissions.
Hope this helps.
/Tony