Refused by Ulrich Drepper:
http://sourceware.org/ml/libc-alpha/2011-07/msg00046.html

We have to keep it until gcc handles this better.

2009-11-06  Petr Baudis <pasky@suse.cz>

	* include/sys/uio.h: Change __vector to __iovec to avoid clash
	with altivec.

diff --git a/include/sys/uio.h b/include/sys/uio.h
index 8c2b016..bfaec59 100644
--- a/include/sys/uio.h
+++ b/include/sys/uio.h
@@ -2,12 +2,12 @@
 #include <misc/sys/uio.h>
 
 /* Now define the internal interfaces.  */
-extern ssize_t __readv (int __fd, __const struct iovec *__vector,
+extern ssize_t __readv (int __fd, __const struct iovec *__iovec,
 			int __count);
-extern ssize_t __libc_readv (int __fd, __const struct iovec *__vector,
+extern ssize_t __libc_readv (int __fd, __const struct iovec *__iovec,
 			     int __count);
-extern ssize_t __writev (int __fd, __const struct iovec *__vector,
+extern ssize_t __writev (int __fd, __const struct iovec *__iovec,
 			 int __count);
-extern ssize_t __libc_writev (int __fd, __const struct iovec *__vector,
+extern ssize_t __libc_writev (int __fd, __const struct iovec *__iovec,
 			      int __count);
 #endif