--- /dev/null
+# ===========================================================================
+# http://
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_VCS_CHECKOUT
+#
+# DESCRIPTION
+#
+# Discover whether or not we are operating with a tree which
+# has been checked out of a version control system.
+#
+#
+# LICENSE
+#
+# Copyright (C) 2012 Brian Aker
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#
+# * The names of its contributors may not be used to endorse or
+# promote products derived from this software without specific prior
+# written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#serial 1
+
+AC_DEFUN([AX_VCS_CHECKOUT],[
+ AC_CACHE_CHECK([for vcs checkout], [ac_cv_vcs_checkout], [
+ AS_IF([test -d ".bzr"],[ac_cv_vcs_checkout=yes])
+ AS_IF([test -d ".svn"],[ac_cv_vcs_checkout=yes])
+ AS_IF([test -d ".hg"], [ac_cv_vcs_checkout=yes])
+ AS_IF([test -d ".git"],[ac_cv_vcs_checkout=yes])
+ ])
+
+ AS_IF([test "$ac_cv_vcs_checkout" = yes], [
+ ])
+ ])