linux-kernel - Re: [tip:x86/build] x86, vdso: Error out if the vdso contains external references

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Date:	Tue, 27 Jul 2010 22:25:55 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	andi@...stfloor.org, tglx@...utronix.de
Subject: Re: [tip:x86/build] x86, vdso: Error out if the vdso contains external
 references

Stephen Rothwell wrote:
> Hi,
> 
> On Fri, 18 Jun 2010 22:16:05 GMT "tip-bot for H. Peter Anvin" <hpa@...ux.intel.com> wrote:
>> diff --git a/arch/x86/vdso/checkundef.sh b/arch/x86/vdso/checkundef.sh
>> new file mode 100755
>> index 0000000..490be1c
>> --- /dev/null
>> +++ b/arch/x86/vdso/checkundef.sh
>> @@ -0,0 +1,10 @@
>> +#!/bin/sh
>> +nm="$1"
>> +file="$2"
>> +"$nm" "$file" | grep '^ *U' > /dev/null 2>&1
> 
> Quoting $nm here doesn't work if you are building with ccache like this:
> 
> make CROSS_COMPILE="ccache ...."

Hmmm... in some ways I'm not sure if that's a feature or a bug, but I 
guess it's the only way currently provided.  Sigh.

	-hpa
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