Date: Fri, 10 May 2002 15:35:46 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org, <cvs-committers@FreeBSD.org> Subject: RE: cvs commit: src/sys/boot/i386/boot2 Makefile Message-ID: <20020510151516.Q7524-100000@gamplex.bde.org> In-Reply-To: <XFMail.20020510000808.jhb@FreeBSD.org>
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On Fri, 10 May 2002, John Baldwin wrote: > AFAICT, the problem is that gcc 3.1 is not properly respecting the > -fno-align-foo arguments. My guess is that this is a bug in gcc, but > I have no idea if it is a bug in general or if it is i386-specific. Using > alignment values greater than 4 noticably bloated the binary further, but > values <= 4 make no difference. (no-align-foo is supposedly equivalent to > align-foo=1, and align-foo=0 is some MD default value). Alignment to 4-byte boundaries only accounts for half of the bloat. I get the following amounts free with gcc-old and various alignment options: -malign-foo=0 (default) 148 -malign-foo=1 116 (bloat = 32) -malign-foo=2 20 (bloat = 128) -malign-foo=3 -108 (bloat = 256) -malign-foo=4 -428 (bloat = 576) Unbreaking the Makefile to include <bsd.kern.mk> so that my -mno-align-long-strings flag is put in CFLAGS and fixing the syntax errors exposed by -ansi gives: -malign-foo=0 -mno-align-long-strings 212 (bloat = -64) Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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