A possibility like #ifdef in HAL files?

Hi,
is there a possibility to define a value (like #define in C) and then use something like #ifdef in the HAL files?
For example you want to use nearly a same config on two machines/computers and they decide only in a very few points.

HALcmd has no logic commands built in.
You could use HAL to load say a python program though and use the python program to do the logic.
Might be akward, might be ok - depends on what you really want to do.

You can use HALTCL files:

linuxcnc.org/docs/devel/html/hal/haltcl.html

Oh yes - I forgot about that.

Not really what I was looking for, but thanks!