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From: David Miller <>
Subject: Re: Kbuild change breaks the ppc64 build
Date: Thu, 08 Feb 2007 04:00:03 -0800 (PST)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

From: Paul Mackerras <>
Date: Thu, 8 Feb 2007 22:10:54 +1100

> Commit 5de043f4bd11a9e0a3e8daec7d1905da575a76b7 breaks the build on
> 64-bit powerpc because we no longer get the -m64 flag passed to gcc.
> There is code in arch/powerpc/Makefile which adds (or used to add)
> -m64 to AS, LD and CC if we are running on a 64-bit machine (which I
> am) and have a biarch toolchain (which I do).  Without -m64, the
> toolchain assumes 32-bit and all sorts of things break spectacularly.
> I haven't yet tracked down exactly why this commit has this effect,
> since I find it takes considerable time and effort to understand
> Kbuild.

It's this commit:

commit 5de043f4bd11a9e0a3e8daec7d1905da575a76b7
Author: Oleg Verych <>
Date:   Tue Feb 6 02:18:21 2007 +0100

    [PATCH] kbuild: improve option checking, Kbuild.include cleanup
     GNU binutils, root users, tmpfiles, external modules ro builds must
     be fixed to do the right thing now.
    Cc: Roman Zippel <>
    Cc: Sam Ravnborg <>
    Cc: Horst Schirmeier <>
    Cc: Jan Beulich <>
    Cc: Daniel Drake <>
    Cc: Andi Kleen <>
    Cc: Randy Dunlap <>
    Signed-off-by: Oleg Verych <>
    Signed-off-by: Linus Torvalds <>

Linus and Oleg tried to fix it with various subsequent changes
to scripts/Kbuild.include, but it's still broken.

For some reason $(call ...) invocations add spaces.  I tried
another test case:

define test
 $(shell echo -n)

VAR:=$(call test)

	@echo "\'$(VAR)\'"

And this always prints:


even with GNU Make version 3.81

If I put a $(strip ...) around the define, the space is
still there.  If I put the $(strip ...) around VAR's
$(call), the space goes away.

  reply	other threads:[~2007-02-08 12:00 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-08 11:10 Paul Mackerras
2007-02-08 12:00 ` David Miller [this message]
2007-02-08 12:35   ` Oleg Verych
2007-02-08 14:12   ` Michal Ostrowski
2007-02-08 12:47 ` Oleg Verych
2007-02-08 13:17   ` David Miller
2007-02-08 13:45     ` final (Re: Kbuild change breaks the ppc64 build) Oleg Verych

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