Date: Wed, 20 Oct 2004 10:36:00 -0400 (EDT)
From: "Richard B. Johnson" <root@chaos.analogic.com>
Reply-To: root@chaos.analogic.com
To: Linux kernel <linux-kernel@vger.kernel.org>
Subject: Module compilation
Message-ID: <Pine.LNX.4.61.0410201034590.12062@chaos.analogic.com>
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In Makefiles for compiling modules before the new
kernel build procedure, we would just build up
a gcc command-line with the correct parameters
and definitions, i.e. :

CC = gcc -Wall -O2 -etc -etc

DEFINES = -DMODULE -D__KERNEL__ -DONE=1 -DTWO=2 -DETC=etc

CC += $(DEFINES)

In this manner, one could dynamically change definitions
(-DEFINES) being passed to the compiler. The problem is
that the new compile procedure doesn't allow this. It
is possible to 'cheat' and add a string to CFLAGS like

CFLAGS += -DONE=1 -DTWO=2 -DETC=etc

...but it's not CFLAGS that needs to be modified, it's
a named variable that doesn't exist yet, perhaps "USERDEF",
or "DEFINES". I see that the normal "defines" is a constant 
called "CHECKFLAGS", so this isn't appropriate for user
modification.

Could whomever remade the kernel Makefile, please add
a variable, initially set to "", like CFLAGS_KERNEL, that
is exported and is always included on the compiler command-
line?


Cheers,
Dick Johnson
Penguin : Linux version 2.6.9 on an i686 machine (5537.79 GrumpyMips).
                  98.36% of all statistics are fiction.
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