linux-kernel - headersinstall of kvm.h does not work

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Message-Id: <200803071326.06682.borntraeger@de.ibm.com>
Date:	Fri, 7 Mar 2008 13:26:06 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Avi Kivity <avi@...ranet.com>
Cc:	Sam Ravnborg <sam@...nborg.org>, kvm-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: headersinstall of kvm.h does not work

Hello Avi,

in commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6 you changed 
include/linux/Kbuild:
----snip----
KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM
Currently, make headers_check barfs due to <asm/kvm.h>, which <linux/kvm.h>
includes, not existing.  Rather than add a zillion <asm/kvm.h>s, export 
kvm.h only if the arch actually supports it.
[...]
 unifdef-y += keyboard.h
-unifdef-y += kvm.h
+unifdef-$(CONFIG_HAVE_KVM) += kvm.h
 unifdef-y += llc.h
 unifdef-y += loop.h
----snip------

This patch does not work. Kbuild (scripts/Makefile.headersinst) does not 
check the config file, so kvm.h is never installed.

Sam is there an easy way to allow constructs like "unifdef-$(CONFIG_FOO)"?

Thanks

Christian

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