15:25:56 josse@C2D:/d/Games/Diablo 2$ ls *.c
read-bits.c  read-bits2.c
15:26:18 josse@C2D:/d/Games/Diablo 2$ gcc -Wall -Wextra -std=c99 read-bits2.c -o read-bits2
/tmp/cc5tYRyl.o:read-bits2.c:(.text+0x0): multiple definition of `_bit_string'
/tmp/cc5tYV7C.o:read-bits.c:(.text+0x0): first defined here
/tmp/cc5tYRyl.o:read-bits2.c:(.text+0xc5): multiple definition of `_main'
/tmp/cc5tYV7C.o:read-bits.c:(.text+0xc4): first defined here
collect2: ld returned 1 exit status