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Date: Fri, 25 Aug 2006 21:35:15 +0100 From: David Woodhouse <dwmw2@...radead.org> To: Rob Landley <rob@...dley.net> Cc: linux-kernel@...r.kernel.org, linux-tiny@...enic.com, devel@...top.org Subject: Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine On Fri, 2006-08-25 at 16:11 -0400, Rob Landley wrote: > BusyBox has been doing this for months now: "build at once" is one of our > config options. I'd like to point out that gcc eats needs several hundred > megabytes of ram to do this and you have no useful progress indicator between > starting and ending. But the result is definitely smaller. It isn't that bad when you're only building a few files at a time -- I wouldn't suggest doing it for the whole kernel. And you get a nice progress indicator at the moment -- a new warning about global register variables every time it eats a new file, due to GCC PR27899 :) > We also tell the linker "--sort-common --gc-sections" which may or may not > apply here... We want --gc-sections (which requires -ffunction-sections -fdata-sections to be useful) but that's a separate issue. We were doing it a long time ago for the FR-V kernel; Marcelo has been looking at it recently for other architectures. -- dwmw2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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