1# =========================================================================== 2# http://www.gnu.org/software/autoconf-archive/ax_expand_prefix.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_EXPAND_PREFIX 8# 9# DESCRIPTION 10# 11# When $prefix and $exec_prefix are still set to NONE then set them to the 12# usual default values - being based on $ac_default_prefix. - this macro 13# can be AC_REQUIREd by other macros that need to compute values for 14# installation directories. It has been observed that it was done wrong 15# over and over again, so this is a bit more safe to do. 16# 17# remember - setting exec_prefix='${prefix}' needs you interpolate 18# directories multiple times, it is not sufficient to just say 19# MYVAR="${datadir}/putter" but you do have to run `eval` a few times, 20# sth. like MYVAR=`eval "echo \"$MYVAR\""` done atleast two times. 21# 22# The implementation of this macro simply picks up the lines that would be 23# run at the start of AC_OUTPUT anyway to set the prefix/exec_prefix 24# defaults. Between AC_INIT and the first command to AC_REQUIRE this macro 25# you can set the two variables to something explicit instead. Probably, 26# any command to compute installation directories should be run _after_ 27# AM_INIT_AUTOMAKE 28# 29# LICENSE 30# 31# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> 32# 33# This program is free software; you can redistribute it and/or modify it 34# under the terms of the GNU General Public License as published by the 35# Free Software Foundation; either version 3 of the License, or (at your 36# option) any later version. 37# 38# This program is distributed in the hope that it will be useful, but 39# WITHOUT ANY WARRANTY; without even the implied warranty of 40# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 41# Public License for more details. 42# 43# You should have received a copy of the GNU General Public License along 44# with this program. If not, see <http://www.gnu.org/licenses/>. 45# 46# As a special exception, the respective Autoconf Macro's copyright owner 47# gives unlimited permission to copy, distribute and modify the configure 48# scripts that are the output of Autoconf when processing the Macro. You 49# need not follow the terms of the GNU General Public License when using 50# or distributing such scripts, even though portions of the text of the 51# Macro appear in them. The GNU General Public License (GPL) does govern 52# all other use of the material that constitutes the Autoconf Macro. 53# 54# This special exception to the GPL applies to versions of the Autoconf 55# Macro released by the Autoconf Archive. When you make and distribute a 56# modified version of the Autoconf Macro, you may extend this special 57# exception to the GPL to apply to your modified version as well. 58 59#serial 7 60 61AC_DEFUN([AX_EXPAND_PREFIX],[dnl 62 # The prefix default can be set in configure.ac (otherwise it is /usr/local) 63 test "x$prefix" = xNONE && prefix=$ac_default_prefix 64 # Let make expand exec_prefix. Allows to override the makevar 'prefix' later 65 test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' 66]) 67