m4/ac_define_dir.m4

   1 # ===========================================================================
   2 #             http://autoconf-archive.cryp.to/ac_define_dir.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AC_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
   8 #
   9 # DESCRIPTION
  10 #
  11 #   This macro sets VARNAME to the expansion of the DIR variable, taking
  12 #   care of fixing up ${prefix} and such.
  13 #
  14 #   VARNAME is then offered as both an output variable and a C preprocessor
  15 #   symbol.
  16 #
  17 #   Example:
  18 #
  19 #      AC_DEFINE_DIR([DATADIR], [datadir], [Where data are placed to.])
  20 #
  21 # LAST MODIFICATION
  22 #
  23 #   2008-04-12
  24 #
  25 # COPYLEFT
  26 #
  27 #   Copyright (c) 2008 Stepan Kasal <kasal@ucw.cz>
  28 #   Copyright (c) 2008 Andreas Schwab <schwab@suse.de>
  29 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
  30 #   Copyright (c) 2008 Alexandre Oliva
  31 #
  32 #   Copying and distribution of this file, with or without modification, are
  33 #   permitted in any medium without royalty provided the copyright notice
  34 #   and this notice are preserved.
  35
  36 AC_DEFUN([AC_DEFINE_DIR], [
  37   prefix_NONE=
  38   exec_prefix_NONE=
  39   test "x$prefix" = xNONE && prefix_NONE=yes && prefix=$ac_default_prefix
  40   test "x$exec_prefix" = xNONE && exec_prefix_NONE=yes && exec_prefix=$prefix
  41 dnl In Autoconf 2.60, ${datadir} refers to ${datarootdir}, which in turn
  42 dnl refers to ${prefix}.  Thus we have to use `eval' twice.
  43   eval ac_define_dir="\"[$]$2\""
  44   eval ac_define_dir="\"$ac_define_dir\""
  45   AC_SUBST($1, "$ac_define_dir")
  46   AC_DEFINE_UNQUOTED($1, "$ac_define_dir", [$3])
  47   test "$prefix_NONE" && prefix=NONE
  48   test "$exec_prefix_NONE" && exec_prefix=NONE
  49 ])