Imported http://autoconf-archive.cryp.to/ release 2007-02-14.

1 files changed, 72 insertions, 0 deletions

diff --git a/m4/ax_expand_prefix.m4 b/m4/ax_expand_prefix.m4
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+##### http://autoconf-archive.cryp.to/ax_expand_prefix.html
+#
+# SYNOPSIS
+#
+#   AX_EXPAND_PREFIX
+#
+# DESCRIPTION
+#
+#   When $prefix and $exec_prefix are still set to NONE then set them
+#   to the usual default values - being based on $ac_default_prefix. -
+#   this macro can be AC_REQUIREd by other macros that need to compute
+#   values for installation directories. It has been observed that it
+#   was done wrong over and over again, so this is a bit more safe to
+#   do.
+#
+#   remember - setting exec_prefix='${prefix}' needs you interpolate
+#   directories multiple times, it is not sufficient to just say
+#   MYVAR="${datadir}/putter" but you do have to run `eval` a few
+#   times, sth. like MYVAR=`eval "echo \"$MYVAR\""` done atleast two
+#   times.
+#
+#   The implementation of this macro simply picks up the lines that
+#   would be run at the start of AC_OUTPUT anyway to set the
+#   prefix/exec_prefix defaults. Between AC_INIT and the first command
+#   to AC_REQUIRE this macro you can set the two variables to something
+#   explicit instead. Probably, any command to compute installation
+#   directories should be run _after_ AM_INIT_AUTOMAKE
+#
+# LAST MODIFICATION
+#
+#   2006-10-13
+#
+# COPYLEFT
+#
+#   Copyright (c) 2006 Guido U. Draheim <guidod@gmx.de>
+#
+#   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 of the
+#   License, 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.
+#
+#   As a special exception, the respective Autoconf Macro's copyright
+#   owner gives unlimited permission to copy, distribute and modify the
+#   configure scripts that are the output of Autoconf when processing
+#   the Macro. You need not follow the terms of the GNU General Public
+#   License when using or distributing such scripts, even though
+#   portions of the text of the Macro appear in them. The GNU General
+#   Public License (GPL) does govern all other use of the material that
+#   constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the
+#   Autoconf Macro released by the Autoconf Macro Archive. When you
+#   make and distribute a modified version of the Autoconf Macro, you
+#   may extend this special exception to the GPL to apply to your
+#   modified version as well.
+
+AC_DEFUN([AX_EXPAND_PREFIX],[dnl
+  # The prefix default can be set in configure.ac (otherwise it is /usr/local)
+  test "x$prefix" = xNONE && prefix=$ac_default_prefix
+  # Let make expand exec_prefix. Allows to override the makevar 'prefix' later
+  test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+])