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Diffstat (limited to 'build-aux/m4/m4-rename.m4')
| -rw-r--r-- | build-aux/m4/m4-rename.m4 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/build-aux/m4/m4-rename.m4 b/build-aux/m4/m4-rename.m4 new file mode 100644 index 00000000..4062cdec --- /dev/null +++ b/build-aux/m4/m4-rename.m4 @@ -0,0 +1,45 @@ +# -*- Autoconf -*- +# m4-rename.m4 -- Test the abilities of rename. +# Written by Eric Blake <ebb9@byu.net> +# +# Copyright (C) 2008, 2010, 2013 Free Software Foundation, Inc. +# +# This file is part of GNU M4. +# +# GNU M4 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. +# +# GNU M4 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 this program. If not, see <http://www.gnu.org/licenses/>. + +# serial 1 + +# M4_RENAME +# --------- +# Detect platforms like mingw where rename can't move open files. +AC_DEFUN([M4_RENAME], +[AC_CACHE_CHECK([whether an open file can be renamed], + [M4_cv_func_rename_open_file_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], + [FILE *f = fopen ("conftest.1", "w+"); + int result = rename ("conftest.1", "conftest.2"); + fclose (f); remove ("conftest.1"); remove ("conftest.2"); + return result;])], + [M4_cv_func_rename_open_file_works=yes], + [M4_cv_func_rename_open_file_works=no], + [M4_cv_func_rename_open_file_works='guessing no'])]) +if test "$M4_cv_func_rename_open_file_works" = yes ; then + M4_rename_open_works=1 +else + M4_rename_open_works=0 +fi +AC_DEFINE_UNQUOTED([RENAME_OPEN_FILE_WORKS], [$M4_rename_open_works], + [Define to 1 if a file can be renamed while open, or to 0 if not.]) +]) |