linux-kernel - RE: kvm-userspace build break (linux/types.h)

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Date:	Fri, 20 Feb 2009 11:00:40 +0800
From:	"Zhang, Xiantao" <xiantao.zhang@...el.com>
To:	Joerg Roedel <joro@...tes.org>,
	Hollis Blanchard <hollisb@...ibm.com>
CC:	kvm-devel <kvm@...r.kernel.org>,
	Jaswinder Singh Rajput <jaswinder@...radead.org>,
	Avi Kivity <avi@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: kvm-userspace build break (linux/types.h)

For x86 and ia64,  linux/types.h will be hacked to asm/types.h when syncing the source. 
You may consult kernel/x86/hack-module.awk to get the answer.  
Xiantao

Joerg Roedel wrote:
> On Thu, Feb 19, 2009 at 03:50:14PM -0600, Hollis Blanchard wrote:
>> A recent kernel merge breaks kvm-userspace build:
>>         make[1]: Entering directory
>>         `/root/hollisb/kvm-userspace.git/libkvm' gcc -m64
>>         -D__x86_64__ -MMD -MF ./.libkvm.d -g -fomit-frame-pointer
>>                          -Wall  -fno-stack-protector   -I
>>                         
>>         /root/hollisb/kvm-userspace.git/kernel/include   -c -o
>>         libkvm.o libkvm.c In file included from
>>         /usr/include/bits/fcntl.h:24, from /usr/include/fcntl.h:34,
>>         from libkvm.c:30: /usr/include/sys/types.h:46: error:
>> conflicting types for 'loff_t' /usr/include/linux/types.h:30: error:
>> previous declaration of 'loff_t' was here
>> /usr/include/sys/types.h:62: error: conflicting types for 'dev_t'
>> /usr/include/linux/types.h:13: error: previous declaration of
>> 'dev_t' was here         [...]     
>> 
>> I built like so:
>>         ./configure
>>         make -C kernel LINUX=/path/to/kvm.git sync
>>         make
>> 
>> The problem appears to be 00bfddaf7f68a6551319b536f052040c370756b0
>> and 
>> cef3767852a9b1a7ff4a8dfe0969e2d32eb728df, both from Jaswinder Singh
>> Rajput <jaswinder@...radead.org>:
>>         -#include <asm/types.h>
>>         +#include <linux/types.h>
>> 
>> With these changes, libkvm.c ends up
>> including /usr/include/linux/types.h, instead of the
>> intended ../kernel/include/linux/types.h.
> 
> I had the same problem some weeks ago. IIRC I fixed it with some
> include reordering in libkvm.h.
> 
> Joerg

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