1# statesave.m4 serial 2 2 3# Copyright (C) 2000-2012 Free Software Foundation, Inc. 4 5# This program is free software: you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation, either version 3 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18# AC_STATE_SAVE(FILE) 19# ------------------- 20# Save the shell variables and directory listing. AT_CHECK_ENV uses these to 21# confirm that no test modifies variables outside the Autoconf namespace or 22# leaves temporary files. AT_CONFIG_CMP uses the variable dumps to confirm 23# that tests have the same side effects regardless of caching. 24# 25# The sed script duplicates uniq functionality (thanks to 'info sed 26# uniq' for the recipe), in order to avoid a MacOS 10.5 bug where 27# readdir can list a file multiple times in a rapidly changing 28# directory, while avoiding yet another fork. 29m4_defun([AC_STATE_SAVE], 30[(set) 2>&1 | sort >state-env.$1 31ls | sed '/^at-/d;/^state-/d;/^config\./d 32 h 33 :b 34 $b 35 N 36 /^\(.*\)\n\1$/ { 37 g 38 bb 39 } 40 $b 41 P 42 D' >state-ls.$1 43])# AC_STATE_SAVE 44