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   1 # ===========================================================================
   2 #       http://www.gnu.org/software/autoconf-archive/ax_with_prog.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_WITH_PROG([VARIABLE],[program],[VALUE-IF-NOT-FOUND],[PATH])
   8 #
   9 # DESCRIPTION
  10 #
  11 #   Locates an installed program binary, placing the result in the precious
  12 #   variable VARIABLE. Accepts a present VARIABLE, then --with-program, and
  13 #   failing that searches for program in the given path (which defaults to
  14 #   the system path). If program is found, VARIABLE is set to the full path
  15 #   of the binary; if it is not found VARIABLE is set to VALUE-IF-NOT-FOUND
  16 #   if provided, unchanged otherwise.
  17 #
  18 #   A typical example could be the following one:
  19 #
  20 #     AX_WITH_PROG(PERL,perl)
  21 #
  22 #   NOTE: This macro is based upon the original AX_WITH_PYTHON macro from
  23 #   Dustin J. Mitchell <dustin@cs.uchicago.edu>.
  24 #
  25 # LICENSE
  26 #
  27 #   Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
  28 #   Copyright (c) 2008 Dustin J. Mitchell <dustin@cs.uchicago.edu>
  29 #
  30 #   Copying and distribution of this file, with or without modification, are
  31 #   permitted in any medium without royalty provided the copyright notice
  32 #   and this notice are preserved. This file is offered as-is, without any
  33 #   warranty.
  34
  35 #serial 16
  36
  37 AC_DEFUN([AX_WITH_PROG],[
  38     AC_PREREQ([2.61])
  39
  40     pushdef([VARIABLE],$1)
  41     pushdef([EXECUTABLE],$2)
  42     pushdef([VALUE_IF_NOT_FOUND],$3)
  43     pushdef([PATH_PROG],$4)
  44
  45     AC_ARG_VAR(VARIABLE,Absolute path to EXECUTABLE executable)
  46
  47     AS_IF(test -z "$VARIABLE",[
  48         AC_MSG_CHECKING(whether EXECUTABLE executable path has been provided)
  49         AC_ARG_WITH(EXECUTABLE,AS_HELP_STRING([--with-EXECUTABLE=[[[PATH]]]],absolute path to EXECUTABLE executable), [
  50             AS_IF([test "$withval" != yes && test "$withval" != no],[
  51                 VARIABLE="$withval"
  52                 AC_MSG_RESULT($VARIABLE)
  53             ],[
  54                 VARIABLE=""
  55                 AC_MSG_RESULT([no])
  56                 AS_IF([test "$withval" != no], [
  57                   AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[])
  58                 ])
  59             ])
  60         ],[
  61             AC_MSG_RESULT([no])
  62             AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[])
  63         ])
  64     ])
  65
  66     popdef([PATH_PROG])
  67     popdef([VALUE_IF_NOT_FOUND])
  68     popdef([EXECUTABLE])
  69     popdef([VARIABLE])
  70 ])