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Re: [Qemu-devel] [PATCH] build fix: xen on NetBSD/amd64
From: |
Christoph Egger |
Subject: |
Re: [Qemu-devel] [PATCH] build fix: xen on NetBSD/amd64 |
Date: |
Fri, 10 Jul 2009 10:19:31 +0200 |
User-agent: |
KMail/1.9.7 |
On Thursday 09 July 2009 21:21:06 Anthony Liguori wrote:
> Christoph Egger wrote:
> > Hi!
> >
> > Attached patch fixes this build error on NetBSD/amd64:
> >
> > hw/xen_blkif.h:20: warning: #pragma pack(psuh[, id], <n>) is not
> > supported on this target
> > hw/xen_blkif.h:36: warning: #pragma pack(pop[, id], <n>) is not supported
> > on this target
> >
> > Signed-off-by: Christoph Egger <address@hidden>
>
> You'll invoke the fury of malc for introducing an identifier that begins
> with '__' :-)
In NetBSD, there is this in <sys/cdefs.h> :
#if __GNUC_PREREQ__(2, 7)
#define __packed __attribute__((__packed__))
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
#elif defined(__PCC__)
#define __packed _Pragma("packed 1")
#define __aligned(x) _Pragma("aligned " __STRING(x))
#define __section(x) _Pragma("section " ## x)
#elif defined(__lint__)
#define __packed /* delete */
#define __aligned(x) /* delete */
#define __section(x) /* delete */
#else
#define __packed error: no __packed for this compiler
#define __aligned(x) error: no __aligned for this compiler
#define __section(x) error: no __section for this compiler
#endif
> There really isn't pragma pack on NetBSD? That's ashame.
No. Above defines are sufficient and portable.
Now you know where the __aligned define in my patch comes from. :-)
Christoph
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Re: [Qemu-devel] [PATCH] build fix: xen on NetBSD/amd64, Anthony Liguori, 2009/07/10