Getting an error when trying to compile a c file using gcc

Question

I tried looking everywhere to see if theres an answer but it seems that people have encountered the similar problem but none of the solutions that I read have worked.

Im using gcc as my compiler

I am familiar with c++ but never encountered a problem like this on c++, but, Im just trying to do a simple printf and scanf for user input and printing out the results.

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int num1, num2;

    printf("Enter two integers: \n");
    scanf("%d%d",&num1,&num2);

    printf("your two integers are: %d and %d \n", num1,num2 );

return 0;
}

the error that I get in the terminal:

Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

thank you in advanced!

The error message mentions clang. Are you sure you're using gcc? — sneep
– sneep, Commented Sep 7, 2018 at 1:35
gcc -c main.c , gcc -o main main.c, and i tried gcc -o main main.o ,still same error — theRat
– theRat, Commented Sep 7, 2018 at 1:36
@sneep gcc might be a symlink to clang, for compatibility. — Barmar
– Barmar, Commented Sep 7, 2018 at 1:39

Jonathan Leffler · Accepted Answer · 2018-09-07 03:59:45Z

1

I think I figured it out, and it might have been an outdated gcc, so I just typed these commands in the terminal and it fixed it.

brew update

brew install gcc

brew cleanup

Thank you for your help. Honestly I am not sure if it was that fixed it but that that is the only thing that I ran.

edited Sep 7, 2018 at 3:59

Jonathan Leffler

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answered Sep 7, 2018 at 3:27

theRat

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