Jenkins won't compile C program on WSL - jenkins

Question

I just started learning how Jenkins works and at this moment I'm trying to build a Jenkins Pipeline Job on a WSL2 Ubuntu that automatically compiles my program main.c and runs it using ./a.out command.
This is my Jenkinsfile:
pipeline {
agent any
stages {
stage('Build') {
steps {
cd /mnt/e/dev/jenkins
gcc -Wall main.c
}
}
stage('Test') {
steps {
./a.out
}
}
stage('Deploy') {
steps {
}
}
}
}
As you can see, my main.c is stored inside the E:\dev\jenkins Windows directory, and before compiling it, I'll need to cd into that directory. After compilation, being in the same directory, I'm trying to run the program, through the Test stage.
The problem is, whenever I click on "Build now", my builds fail, outputting an error like this:
Started by user Mario Mateaș
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 8: expecting '}', found 'main' # line 8, column 27.
gcc -Wall main.c
^
1 error
at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:309)
at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:149)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:119)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:131)
at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:349)
at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:225)
at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:191)
at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:233)
at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:189)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:966)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:626)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:602)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:579)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:323)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:293)
at groovy.lang.GroovyShell.parseClass(GroovyShell.java:677)
at groovy.lang.GroovyShell.parse(GroovyShell.java:689)
at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:142)
at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:127)
at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:571)
at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:523)
at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:334)
at hudson.model.ResourceController.execute(ResourceController.java:99)
at hudson.model.Executor.run(Executor.java:440)
Finished: FAILURE
Also, if needed, that's how my main.c looks like:
#include <stdio.h>
int main(int argc, char **argv) {
if (argc != 2) {
printf("Invalid number of arguments.\n");
return -1;
}
FILE *f = fopen(argv[1], "r");
if (f == NULL) {
printf("Could not open specified file.\n");
return -2;
}
char buff[100];
while (!feof(f)) {
fgets(buff, 100, f);
printf("%s\n", buff);
}
return 0;
}
What can be the problem? Any help would be appreciated. Thank you!