The logs say:
configure:44820: checking whether rename honors trailing slash on destination
configure:44854: xlc -o conftest -g -D_THREAD_SAFE conftest.c >&5
configure:44854: $? = 0
configure:44854: ./conftest
configure:44854: $? = 1
configure: program exited with status 1
gl_cv_func_rename_slash_dst_works=${gl_cv_func_rename_slash_dst_works=no}
gl_cv_func_rename_slash_src_works=${gl_cv_func_rename_slash_src_works=no}
2010-07-30 Bruno Haible <br...@clisp.org>
rename: Update regarding AIX.
* doc/posix-functions/rename.texi: Mention bug on AIX 7.1.
* m4/rename.m4 (gl_FUNC_RENAME): Update comment.
Reported by Rainer Tammer.
--- doc/posix-functions/rename.texi.orig Fri Jul 30 21:06:35 2010
+++ doc/posix-functions/rename.texi Fri Jul 30 12:13:23 2010
@@ -15,7 +15,7 @@
@item
This function does not reject trailing slashes on the destination for
non-directories on some platforms, as in @code{rename("file","new/")}:
-Solaris 10, Cygwin 1.5.x, mingw.
+AIX 7.1, Solaris 10, Cygwin 1.5.x, mingw.
@item
This function does not reject trailing slashes on symlinks to
non-directories on some platforms, as in
--- m4/rename.m4.orig Fri Jul 30 21:06:35 2010
+++ m4/rename.m4 Fri Jul 30 21:06:32 2010
@@ -1,4 +1,4 @@
-# serial 21
+# serial 22
# Copyright (C) 2001, 2003, 2005-2006, 2009-2010 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
@@ -19,7 +19,7 @@
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([lstat])
- dnl Solaris 10 mistakenly allows rename("file","name/").
+ dnl Solaris 10, AIX 7.1 mistakenly allow rename("file","name/").
dnl NetBSD 1.6 mistakenly forbids rename("dir","name/").
dnl FreeBSD 7.2 mistakenly allows rename("file","link-to-file/").
dnl The Solaris bug can be worked around without stripping
