makeCompiler creates posix binaries
LD mkzenboot
/home/stephen/Downloads/.rockbox/rockbox/rbutil/mkzenboot/buildposix/utils.o: In function `inflate_to_buffer':
/home/stephen/Downloads/.rockbox/rockbox/rbutil/mkzenboot/utils.c:129: undefined reference to `inflateInit_'
/home/stephen/Downloads/.rockbox/rockbox/rbutil/mkzenboot/utils.c:139: undefined reference to `inflate'
/home/stephen/Downloads/.rockbox/rockbox/rbutil/mkzenboot/utils.c:146: undefined reference to `inflateEnd'
collect2: ld returned 1 exit status
make: *** [mkzenboot] Error 1