install tests and functions to run them * configure.ac (octtestsdir): New variable. * build-aux/common.mk (octtestsdir): New variable. (do_subst_default_vals): Substitute it. (test-file-commands): New macro. (%.cc-tst:%.cc, %.yy-tst:%.yy, %.ll-tst:%.ll): New rules. * libinterp/Makefile.am (TST_FILES_SRC, TST_FILES, libinterptestsdir, nobase_libinterptests_DATA): New variables. * defaults.in.h (OCTAVE_OCTTESTSDIR): New macro. * liboctave/Makefile.am (LIBOCTAVE_TST_SRC, TST_FILES_SRC, TST_FILES, liboctavetestsdir, nobase_liboctavetests_DATA): New variables. * toplev.cc (Foctave_config_info): Include octtestsdir in the struct. * fntests.m: Look in topbuilddir for C++ test files. * __run_test_suite__.m: New function, extracted from test/fntests.m. Look for -tst files, not .cc files. Don't report -tst files that are missing tests (there won't be any). * __prog_output_assert__.m, __printf_assert__.m: New functions, extracted from __run_test_suite__.m and renamed from prog_output_assert and printf_assert. Change all uses. * scripts/testfun/module.mk (testfun_FCN_FILES): Include new files in the list. * test/Makefile.am (GENERATED_BC_OVERLOADS_DIRS, GENERATED_BC_OVERLOADS_FILES, fixedtestsdir, nobase_fixedtests_DATA): New variables. (CLEANFILES): Include $(GENERATED_BC_OVERRLOADS_FILES) in the list. (clean-local): Use $(GENERATED_BC_OVERLOADS_DIRS). * build_bc_overload_tests.sh: New options, --list-files, --list-dirs, and --list-classes. * test/classes/module.mk (classes_FCN_FILES): Include recently added .m files in the list. * test.m: Use "var" argument for exist in tests.

new file mode 100644
--- /dev/null
+++ b/scripts/testfun/__printf_assert__.m
@@ -0,0 +1,27 @@
+## Copyright (C) 2005-2012 David Bateman
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn  {Function File} {} __printf_assert__ (@dots{})
+## Undocumented internal function.
+## @end deftypefn
+
+function __printf_assert__ (varargin)
+  global _assert_printf;
+  _assert_printf = cat (2, _assert_printf, sprintf (varargin{:}));
+endfunction