2 # m4-rename.m4 -- Test the abilities of rename.
3 # Written by Eric Blake <ebb9@byu.net>
5 # Copyright (C) 2008, 2010, 2013 Free Software Foundation, Inc.
7 # This file is part of GNU M4.
9 # GNU M4 is free software: you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation, either version 3 of the License, or
12 # (at your option) any later version.
14 # GNU M4 is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
19 # You should have received a copy of the GNU General Public License
20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
26 # Detect platforms like mingw where rename can't move open files.
28 [AC_CACHE_CHECK([whether an open file can be renamed],
29 [M4_cv_func_rename_open_file_works],
30 [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
31 [FILE *f = fopen ("conftest.1", "w+");
32 int result = rename ("conftest.1", "conftest.2");
33 fclose (f); remove ("conftest.1"); remove ("conftest.2");
35 [M4_cv_func_rename_open_file_works=yes],
36 [M4_cv_func_rename_open_file_works=no],
37 [M4_cv_func_rename_open_file_works='guessing no'])])
38 if test "$M4_cv_func_rename_open_file_works" = yes ; then
39 M4_rename_open_works=1
41 M4_rename_open_works=0
43 AC_DEFINE_UNQUOTED([RENAME_OPEN_FILE_WORKS], [$M4_rename_open_works],
44 [Define to 1 if a file can be renamed while open, or to 0 if not.])