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# Build options for memory and multithreading
## Investigate
* Check exactly how much memory is needed for everything.
* Take note of which parts use threading (solving, genptable, other?).
## Prepare code
* Use define / ifdef or similar to compile and build tables only for the
parts to be used.
* If threads = 1, use a much simpler version of the solve method. Remember
that checking if enough solutions have been found is the first thing to
do in singlethread (no locking).
* Do not include pthread if threads = 1.
* Only one optimal solver should be compiled.
* Some simple steps may also need alternatives with smaller tables
(e.g. for staying sub 1Gb). For example dr and drfin.
* If necessary, work out alternatives to "twophase" for low-resource versions.
## Makefile
* Figure out how to change these options via makefile. For example: one
variable for the maximum allowed ram and one for the number of threads.
* (Optional) use a configure script?
* (Optional) interactive installation script?
## Automate
* Scout for resources during installation and choose best configuration
automatically.
* How to do this in Linux / POSIX?
* How to do this in Windows?
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