linux-kernel - RE: module builds need improvement / top Makefile not good enough

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Date:	Mon, 5 Mar 2007 12:03:24 -0500
From:	"Stuart MacDonald" <stuartm@...necttech.com>
To:	"'FN'" <zzzz444@....net>, "'Oleg Verych'" <olecom@...wer.upol.cz>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: module builds need improvement / top Makefile not good enough

From: On Behalf Of FN
> Currently I face the following situation -- I try to build 2 drivers
> from the same Makefile
> -----------
> CWD := $(shell pwd)
> obj-m := driver1.o driver2.o
> driver1-y := d1/d2/d3/f1.o d1/d2/f2.o
> driver2-y := d1/d5/file1.o d1/d6/file2.o
CFLAGS_f1.o := -DMASK=0x123
CFLAGS_file1.o := -DMASK=0x123
CFLAGS_f2.o := -DMASK=0x456
CFLAGS_file2.o := -DMASK=0x456
> ----------
> There are 2 problems here
> 1) kbuild is forcing me to declare EXTRA_CFLAGS in global scope and 
>    I can't build my drivers properly because the MASKs are 
> incompatible. 

Fixed your makefile for you. See Documentation/kbuild/modules.

..Stu

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