Problem We Have
While using VScode to debug code with openMP, there will be errors if you use gcc filename.c directly.
#include<stdio.h>
#include <omp.h>
int main()
{
#pragma omp parallel
{
printf("The parallel region is executed by thread%d\n",omp_get_thread_num());
}
}
Assume the fileneame of the code above is test.c
If you type gcc test.c in terminal and there will be an error like this:
And if you press F5 in VScode, similar error will happend:
This problem troubled me for a few minutes, editing launch.json seems not helpful.
Solution
Remember if we want to compile C code with OpenMP successfully in the command line, you have to input
gcc -fopenmp -o exe_name_withoutexe cfilename.c
But how to apply this command while debugging in VScode?
First, press Ctrl + Shift + P and type “tasks”
You will see some options like this:
Select Configure Default Test Task
Then click gcc.exe: build active file
VScode will create a default tasks.json automatically.
You need to change the contenets in the red box.
Replace them by
"-fopenmp",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe",
"${file}"
After that your tasks.json will looks like this:
Save it and return to test.c, press F5, it works!
