about pr_debug

[lx]

thank you.
But the Makefile is so simple and Not use "cc".
#################################
obj-m   := task_01.o

KDIR:=/lib/modules/`uname -r`/build
PWD:=$(shell pwd)

default:
    echo $KDIR
    $(MAKE) -C $(KDIR) M=$(PWD) modules
#################################

So, how to add "CFLAGS"?


2014-06-25 16:20 GMT+08:00 Bjørn Mork <bjorn at mork.no>:

> Varka Bhadram <varkabhadram at gmail.com> writes:
>
> > refer this :https://www.kernel.org/doc/local/pr_debug.txt
>
> That seems a little outdated since it doesn't mention the extremely
> useful dynamic debug feature.  So please read
> https://www.kernel.org/doc/Documentation/dynamic-debug-howto.txt
> as well.
>
> The ability to dynamically switch on and off debug messages per callsite
> is extremely useful.  And it also enables you to switch on some extra
> info you often want, like function names, without having to explictly
> put them into every format string.
>
> I recommend setting CONFIG_DYNAMIC_DEBUG and taking a look at
> /sys/kernel/debug/dynamic_debug/control if you ever do any kernel
> development.
>
>
>
> Bjørn
>
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