Re: [Qemu-devel] [PATCH] fix qemu build with nas installed

[Christoph Egger <Christoph.Egger@amd.com>]

On 09/21/11 12:16, Stefan Hajnoczi wrote:
> On Wed, Sep 21, 2011 at 10:34 AM, Christoph Egger
> <Christoph.Egger@amd.com>  wrote:
>>
>> When NAS (http://nas.sf.net) is installed then there
>> is an existing audio/audio.h. Then when compiling
>> qemu, #include "audio/audio.h" takes the one from NAS
>> and causes the build to fail.
>>
>> So rename audio/audio.h to audio/qaudio.h and adjust
>> all users.
>>
>> Signed-off-by: Christoph Egger<Christoph.Egger@amd.com>
>>
>> diff --git a/arch_init.c b/arch_init.c
>> index 9a5a0e3..516c4c0 100644
>> --- a/arch_init.c
>> +++ b/arch_init.c
>> @@ -32,7 +32,7 @@
>>   #include "monitor.h"
>>   #include "sysemu.h"
>>   #include "arch_init.h"
>> -#include "audio/audio.h"
>> +#include "audio/qaudio.h"
>
> It's not looking for system headers so why is
> /usr/include/audio/audio.h getting picked up instead of
> ./audio/audio.h?
>
> If it was #include<audio/audio.h>  I could understand but I suspect we
> have a mess of include paths that the compiler is searching and it
> would be nice to fix that instead.

The include pathes passed to the compiler are always pre-pended.
So the compiler searches headers in third-party packages first.
I haven't found the place in configure where this happens.

Christoph

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