[coreboot] CONFIG_ about which messages to compile in

ron minnich rminnich at gmail.com
Tue Feb 10 18:08:41 CET 2009

On Tue, Feb 10, 2009 at 9:03 AM, Peter Stuge <peter at stuge.se> wrote:
> Mart Raudsepp wrote:
>> The log level is now given with an argument, so it's trickier to
>> get the code excluded from the binary completely.
> Maybe split it up then? (But _only_ statics within the printk code!)

Actually it's not that hard.

You have a global , MAXLOGLEVEL. Turn printk into something like this:

#define printk(a, b, ...) if (a <= MAXLOGLEVEL) print(blah blah)

and then let the compiler optimize it all out.

It's kind of like if (0) { etc. etc. }

>> Likely can coerce gcc to do that with specially crafted code.
> I would prefer to avoid that.

This is very non-special


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