System Variables / GCC compiler variables- pointer to documentation?

Using Arduino Programming Questions
1

Can anyone advise on a link to documentation on the system Variables produced by the operating system?

Thanks to SukkoPera I am aware that ARDUINO holds the ide build number.

I have seen references to DATE and TIME preprocessor directives.

2

Google 'DATE'?

3

Very useful.

Is the "ARDUINO" variable the only one added which appears to be not from the generic cc compiler?

4

david-:
Is the "ARDUINO" variable the only one added which appears to be not from the generic cc compiler?

F_CPU

and one of these depending on target : AVR_ATmega168, AVR_ATmega368, ...

Try this : const.pde ยท GitHub

5

Exactly what I was looking for.

Thanks.