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[Qemu-devel] [PATCH] linux-user: Fix compilation when F_SETPIPE_SZ isn't

From: Peter Maydell
Subject: [Qemu-devel] [PATCH] linux-user: Fix compilation when F_SETPIPE_SZ isn't defined
Date: Thu, 30 Jun 2016 17:33:49 +0100

Older kernels don't have F_SETPIPE_SZ and F_GETPIPE_SZ (in
particular RHEL6's system headers don't define these). Add
ifdefs so that we can gracefully fall back to not supporting
those guest ioctls rather than failing to build.

Signed-off-by: Peter Maydell <address@hidden>
Reported by an anonymous IRC user...

 linux-user/syscall.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 6ad8239..165fd06 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5598,10 +5598,12 @@ static int target_to_host_fcntl_cmd(int cmd)
        case TARGET_F_SETOWN_EX:
            return F_SETOWN_EX;
+#ifdef F_SETPIPE_SZ
         case TARGET_F_SETPIPE_SZ:
             return F_SETPIPE_SZ;
         case TARGET_F_GETPIPE_SZ:
             return F_GETPIPE_SZ;
             return -TARGET_EINVAL;

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