Trouble mixing .s .c files

[fuhsnn]

asmfn.s

.text
.globl asmfn
asmfn:
  movl $-123, %eax
  ret
.section .note.GNU-stack,"",@progbits

main.c

#include <stdio.h>
extern int asmfn(void);
int main() {
  printf("%d\n", asmfn());
}

run chibicc asmfn.s main.c got undefined reference to asmfn