Re: [PATCH 2/4] Core support for --combine -fwhole-program

From: David Woodhouse <dwmw2@infradead.org>
To: Josh Triplett <josht@us.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] Core support for --combine -fwhole-program
Date: Thu, 24 Aug 2006 18:33:23 +0100	[thread overview]
Message-ID: <1156440803.3012.170.camel@pmac.infradead.org> (raw)
In-Reply-To: <1156440438.3418.25.camel@josh-work.beaverton.ibm.com>

On Thu, 2006-08-24 at 10:27 -0700, Josh Triplett wrote:
> Would the generation and use of preprocessed source files ($x.c -> $x.i)
> help solve the "standard CFLAGS" problem here, and allow a subsequent
> single compilation of the entire kernel (sans modules) with --combine
> -fwhole-program?

Not for stuff like CFLAGS_raid6altivec1.o := -maltivec -mabi-altivec

Stuff which is _purely_ #defines, such as...
	ncr53c8xx-flags-$(CONFIG_SCSI_ZALON) \
	                := -DCONFIG_NCR53C8XX_PREFETCH -DSCSI_NCR_BIG_ENDIAN \
	                        -DCONFIG_SCSI_NCR53C8XX_NO_WORD_TRANSFERS
	CFLAGS_ncr53c8xx.o      := $(ncr53c8xx-flags-y) $(ncr53c8xx-flags-m)

... can probably be done differently anyway.

It's not entirely unreasonable to treat files with their own CFLAGS just
as we have to treat .S files -- compile them separately, then link.

-- 
dwmw2