multiple definition of readbuf

[chriscamacho]

$ make
clang -o ch341eeprom ch341eeprom.c ch341funcs.c -lusb-1.0
/usr/bin/x86_64-unknown-linux-gnu-ld: /tmp/ch341funcs-24799d.o:(.bss+0x8): multiple definition of `readbuf'; /tmp/ch341eeprom-8bc6e9.o:(.bss+0x0): first defined here
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [Makefile:2: default] Error 1

thought I'd just try compiling before buying a programmer, haven't had chance to look at the code...