/tmp/ccoph9kE.o: In function `main':
l6.c:(.text.startup+0x0): multiple definition of `main'
/tmp/ccNTJdNw.o:main.c:(.text.startup+0x0): first defined here
/tmp/ccNTJdNw.o: In function `main':
main.c:(.text.startup+0x15): undefined reference to `l6'
collect2: error: ld returned 1 exit status