I am compiling the boardcom's driver now.
the driver had defined EXTRA_CFLAGS = -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) 
in the a.makefile.
and the a.makefile was included by b.makefile.
when in the b.makefile,
there is this command.
 $(CC) $(DEPS_OPT) $(CFLAGS) $(EXTRA_CFLAGS) -o $@ -c $< ;) 

I had add "echo $(EXTRA_CFLAGS)" before this line;but returns NULL;

so I suspicion the $(EXTRA_CFLAGS) hasn't been work.

I aslo try to add "export EXTRA_CFLAGS" in a.makefile,but it doesn't work either.

the problem has puzzled me for some days.

help me please~~



2010-08-03 



hacklu 



发件人： Américo Wang 
发送时间： 2010-08-03  16:32:08 
收件人： hacklu 
抄送： linux-kernel 
主题： Re: how about KBUILD_MODNAME 
 
On Tue, Aug 03, 2010 at 03:11:59PM +0800, hacklu wrote:
>
>I don't understand the macro KBUILD_MODNAME .
>when I compile a  driver program. It returns me "linux/pci.h:655: error: 'KBUILD_MODNAME' undeclared (first use in this function) "
>
>In the makefile I had used the "-D" options
>
You don't need to care about KBUILD_MODNAME, it is defined
internally by kbuild and passed to your module via "-DKBUILD_MODNAME=XXX"
automatically.
So, it looks like you didn't write your makefile correctly.
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