Compilation Error

[FathiMahdi]

I am having the following error when compiling on ubuntu:

/usr/bin/ld: libcrc.o:(.bss+0x0): multiple definition of `crc_table'; hex2bin.o:(.bss+0x1e8): first defined here
collect2: error: ld returned 1 exit status
make: *** [Makefile:23: hex2bin] Error 1