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- #
- # Check to make sure that the build environment is sane.
- #
-
- # Copyright (C) 1996, 1997, 2000, 2001, 2003 Free Software Foundation, Inc.
-
- # This program 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 2, or (at your option)
- # any later version.
-
- # This program 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, write to the Free Software
- # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- # 02111-1307, USA.
-
- # serial 3
-
- # AM_SANITY_CHECK
- # ---------------
- AC_DEFUN([AM_SANITY_CHECK],
- [AC_MSG_CHECKING([whether build environment is sane])
- # Just in case
- sleep 1
- echo timestamp > conftest.file
- # Do `set' in a subshell so we don't clobber the current shell's
- # arguments. Must try -L first in case configure is actually a
- # symlink; some systems play weird games with the mod time of symlinks
- # (eg FreeBSD returns the mod time of the symlink's containing
- # directory).
- if (
- set X `ls -Lt $srcdir/configure conftest.file 2> /dev/null`
- if test "$[*]" = "X"; then
- # -L didn't work.
- set X `ls -t $srcdir/configure conftest.file`
- fi
- rm -f conftest.file
- if test "$[*]" != "X $srcdir/configure conftest.file" \
- && test "$[*]" != "X conftest.file $srcdir/configure"; then
-
- # If neither matched, then we have a broken ls. This can happen
- # if, for instance, CONFIG_SHELL is bash and it inherits a
- # broken ls alias from the environment. This has actually
- # happened. Such a system could not be considered "sane".
- AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
- alias in your environment])
- fi
-
- test "$[2]" = conftest.file
- )
- then
- # Ok.
- :
- else
- AC_MSG_ERROR([newly created file is older than distributed files!
- Check your system clock])
- fi
- AC_MSG_RESULT(yes)])
-