util/compatfd.c: Only include <sys/syscall.h> if CONFIG_SIGNALFD

util/compatfd.c includes <sys/syscall.h> so that the CONFIG_SIGNALFD
code can use SYS_signalfd. Guard the #include with CONFIG_SIGNALFD
to avoid portability issues on hosts like Haiku which do not
provide that header file.

Signed-off-by: David Carlier <[email protected]>
Reviewed-by: Peter Maydell <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>
Message-id: [email protected]
[PMM: Expanded commit message]
Reviewed-by: Peter Maydell <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>

Author: devnexen

util/compatfd.c

@@ -16,7 +16,9 @@
 #include "qemu/osdep.h"
 #include "qemu/thread.h"
 
+#if defined(CONFIG_SIGNALFD)
 #include <sys/syscall.h>
+#endif
 
 struct sigfd_compat_info
 {