Re: OT: [avr-gcc-list] How to make to variants with one makefile?

[James Hsu]

Anton Erasmus wrote:

> I have a single set of source that supports a number of different versions of
> a PCB with some differences in capabilities. I also use either an ATmega8 on one
> PCB or an ATMega16 or ATMega32 on the other PCBs. Currently I have to define
> the MCU as well as one other define in the makefile.
>
>  
Yikes, thats a fun approach. Then again, the stuff I'm working on is 
even sloppier...

You really should look at the GNU Make info page. I'm pretty much 
learning this stuff as I go along and
since Make isn't going to go anywhere anytime soon, I figure it's a 
pretty good investment of time. Anyhow,
try something like this:


PCBOPT = opt1 opt2
MMCU = atmega8 atmega16 atmega32

TARGETS := $(foreach pcbopt, $(PCBOPT), $(foreach mmcu, $(MMCU), 
$(pcbopt)_$(mmcu)))

tmp:    $(TARGETS)

$(TARGETS):
   @echo address@hidden

which spits out:

address@hidden:~$ make
opt1_atmega8.rom
opt1_atmega16.rom
opt1_atmega32.rom
opt2_atmega8.rom
opt2_atmega16.rom
opt2_atmega32.rom

James