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diff --git a/ChangeLog b/ChangeLog
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+2011-04-21  Eric Blake  <eblake@redhat.com>
+
+	passfd: fix test regression on Linux
+	* modules/passfd-tests (configure.ac): Correct socketpair check.
+
+	passfd: speed up configure and drop unused code
+	* m4/afunix.m4 (gl_SOCKET_AFUNIX): Rename...
+	* m4/passfd.m4 (gl_PASSFD): ...to something more fitting of
+	its use.  Drop test for setting unused HAVE_UNIXSOCKET_SCM_RIGHTS.
+	Instead of probing at configure for unix_scm_rights_bsd44_way,
+	instead probe for CMSG_FIRSTHDR at compile time.  Simplify BSD 4.3
+	check to a struct member probe.
+	* lib/passfd.c (includes): Nothing here requires <sys/un.h>.
+	(sendfd, recvfd): Update preprocessor checks.
+	* modules/passfd (Files): Reflect rename, and drop unused file.
+	(Depends-on): Drop unused dependency.
+
+	passfd: allow compilation on mingw
+	* modules/sys_socket (Depends-on): Add sys_uio.
+	* lib/sys_socket.in.h [!@HAVE_SYS_SOCKET_H@]: Use it for struct
+	iovec and a minimal struct msghdr.
+	* m4/afunix.m4 (gl_SOCKET_AFUNIX): Detect recvmsg/sendmsg.
+	* tests/test-sys_socket.c (main): Enhance test.
+	* lib/passfd.c (include): Drop <sys/uio.h>; <sys/sockets.h> is
+	guaranteed to provide what we need.
+	(sendmsg, recvmsg): Declare fallbacks if we lack sendmsg.
+	* modules/passfd-tests (Depends-on): Add sys_wait.
+	* tests/test-passfd.c (main): Skip test on mingw, for now.
+	* doc/posix-headers/sys_socket.texi (sys/socket.h): Document the
+	partial 'struct msghdr' implementation.
+
+	sys_uio: new module
+	* modules/sys_uio: New module.
+	* modules/sys_uio-tests: Likewise.
+	* lib/sys_uio.in.h: New file.
+	* m4/sys_uio_h.m4: Likewise.
+	* tests/test-sys_uio.c: Likewise.
+	* doc/posix-headers/sys_uio.texi (sys/uio.h): Document it.
+	* MODULES.html.sh (systems lacking POSIX:2008): Likewise.
+
 2011-04-20  Jim Meyering  <meyering@redhat.com>
 
 	useless-if-before-free: avoid false-positive