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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/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 at least 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
- #
- # LICENSE
- #
- # Copyright (c) 2008 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 3 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, see <https://www.gnu.org/licenses/>.
- #
- # 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 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.
-
- #serial 10
-
- 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}'
- ])
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