make `./build-support/factor.sh make-target` /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o: In function `_start': /build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:115: undefined reference to `main' collect2: ld returned 1 exit status ./build-support/factor.sh: line 207: ./factor-word-size: No such file or directory make[1]: Entering directory `/home/chris/src/factor/factorcode' make[1]: *** No rule to make target `unknown'. Stop. make[1]: Leaving directory `/home/chris/src/factor/factorcode' make: *** [default] Error 2