Messages in this thread | | | Date | Sat, 17 Oct 2009 20:25:12 +0200 | From | Pavel Machek <> | Subject | Re: 32-rc1: "CROSS_COMPILE changed" message breaks compilation |
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On Sun 2009-10-11 23:27:57, Sam Ravnborg wrote: > On Mon, Sep 28, 2009 at 09:25:36PM +0200, Pavel Machek wrote: > > Hi! > > > > > > After update to 2.6.32-rc1, I'm getting > > > > > > > > "Makefile:197: *** CROSS_COMPILE changed from "ccache" to to "ccache ". Use "make mrproper" to fix it up. Stop. > > > > > > > > Note that the message has typo in it ("to to")... What is worse, the > > > > message triggers even when I try to run make mrproper. Ouch. > > > > > > The massage is changed in kbuild-fixes.git - but it addresses only ARCH= > > > > > > As a followup to your other mails: > > > The reason to use "make mrproper" is that when ARCH or CROSS_COMPILE changes > > > you have generally either decided to build for a new architecture or > > > you have changed the way you build the kernel (new toolchain or whatever). > > > So to clean up using "make mrproper" is perfectly justified. > > > > > > The target group that uses CROSS_COMPILE to enable ccache are using > > > CROSS_COMPILE is a way it is not designed for so they should expect that it > > > is not a perfect match. > > > > What is the recommended way to run ccache, then? > ccache is a frontend to gcc - so I would have expected > you would use: > > make CC="ccache gcc" > > Or does ccache also benefit ld and as and the other that receive > the $(CROSS_COMPILE) prefix?
You are right that I don't strictly need ccache for anything but cc.
But anyway, check was buggy; I had CROSS_COMPILE="ccache ", and the space at the end broke it. Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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