[Qemu-devel] [PATCH] Add compat eventfd header

["Michael S. Tsirkin" <mst@redhat.com>]

Support build on RHEL 5.X where we have syscall for eventfd but not
userspace wrapper.

(cherry-picked from commit 9e3269181e9bc56feb43bcd4e8ce0b82cd543e65
 in qemu-kvm.git).

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 compat/sys/eventfd.h |   13 +++++++++++++
 configure            |    4 +++
 2 files changed, 16 insertions(+), 0 deletions(-)
 create mode 100644 compat/sys/eventfd.h

diff --git a/compat/sys/eventfd.h b/compat/sys/eventfd.h
new file mode 100644
index 0000000..f55d96a
--- /dev/null
+++ b/compat/sys/eventfd.h
@@ -0,0 +1,13 @@
+#ifndef _COMPAT_SYS_EVENTFD
+#define _COMPAT_SYS_EVENTFD
+
+#include <unistd.h>
+#include <syscall.h>
+
+
+static inline int eventfd (int count, int flags)
+{
+    return syscall(SYS_eventfd, count, flags);
+}
+
+#endif
diff --git a/configure b/configure
index 856b41e..d757a6a 100755
--- a/configure
+++ b/configure
@@ -891,6 +891,9 @@ sparc64-bsd-user \
 "
 fi
 
+#compat headers
+QEMU_CFLAGS="$QEMU_CFLAGS -idirafter $source_path/compat"
+
 if test x"$show_help" = x"yes" ; then
 cat << EOF
 
-- 
1.7.5.53.gc233e