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

[Christoph Egger]

On 09/21/11 12:16, Stefan Hajnoczi wrote:
> On Wed, Sep 21, 2011 at 10:34 AM, Christoph Egger
> <address@hidden>  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<address@hidden>
> >
> > 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

--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85689 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632