[Xen-devel] [PATCH for-4.6] xen/public: arm: Use __typeof__ rather than typeof

[Julien Grall <julien.grall@xxxxxxxxxx>]

The keyword typeof is not portable:

/usr/src/freebsd/sys/xen/hypervisor.h:93:2: error: implicit declaration
of function 'typeof' is invalid in C99
[-Werror,-Wimplicit-function-declaration]

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

---
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Keir Fraser <keir@xxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>

    This patch is a candidate to backport in Xen 4.6, 4.5 and 4.4.

    It would be nice to get this small fix before Xen 4.6 is released.
    Without it, it's not possible to build ARM software including Xen
    headers with -std=c99.
---
 xen/include/public/arch-arm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index faad68d..ba3cd42 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -191,7 +191,7 @@
 #define XEN_GUEST_HANDLE_PARAM(name)    __guest_handle_ ## name
 #define set_xen_guest_handle_raw(hnd, val)                  \
     do {                                                    \
-        typeof(&(hnd)) _sxghr_tmp = &(hnd);                 \
+        __typeof__(&(hnd)) _sxghr_tmp = &(hnd);             \
         _sxghr_tmp->q = 0;                                  \
         _sxghr_tmp->p = val;                                \
     } while ( 0 )
-- 
2.1.4


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