... that means I want to have one project for both Keil and SDCC and just set the usage of one or the other compiler according to a define value.

So there are than specific codes adjusted for Keil and specific for SDCC.

It is working nice in aslong as I am using C. But SDCC assembler doesn't support defines neither macros. That means I have to have different files for SDCC and Keil and this would make my life really hard. Because if I change something in Keil assembler file, I must be sure that I change the same thing for SDCC assembler file.

And I even don't have to mention that I have to have different includes, file lists etc, etc.

greetings
Atti