factor: remove unreachable SQUFOF code at compile time

It was a little confusing as to whether the SQUFOF algorithm was
enabled, and in fact there were no options available to enable it.
Therefore clarify the 3 configurable behaviors for the code to
3 defines at the top of the program, and only include the SQUFOF
code if enabled at compile time.

$ size src/factor-before
   text    data     bss
  93997    1412    2504
$ size src/factor-after
   text    data     bss
  87885    1404    2504

* src/factor.c: Only include the SQUFOF factor code
when enabled via the USE_SQUFOF define.
* doc/coreutils.texi (factor invocation): Update note about
factor limits, as we can factor 128 bit numbers without GMP.

0 files changed, 0 insertions, 0 deletions