commit 18ad0de6513bf8a8e4ba757c069e6806d07920f8
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Oct 23 14:53:12 2018 -0300

    Fix tst-preadvwritev2 build failure on HURD
    
    Commit 7a16bdbb9ff41 uses IOV_MAX, which is not defined on hurd.
    
    Checked on a build for i686-gnu.
    
            * misc/tst-preadvwritev2-common.c (IOV_MAX): Define if not
            defined.

diff --git a/misc/tst-preadvwritev2-common.c b/misc/tst-preadvwritev2-common.c
index 50b9da3fea..3098b4ae0b 100644
--- a/misc/tst-preadvwritev2-common.c
+++ b/misc/tst-preadvwritev2-common.c
@@ -37,6 +37,11 @@
 #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT \
 			 | RWF_APPEND)
 
+/* Generic uio_lim.h does not define IOV_MAX.  */
+#ifndef IOV_MAX
+# define IOV_MAX 1024
+#endif
+
 static void
 do_test_with_invalid_fd (void)
 {