tools/missing-macros/src/m4/progtest.m4

   1 # progtest.m4 serial 6 (gettext-0.18)
   2 dnl Copyright (C) 1996-2003, 2005, 2008-2010 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6 dnl
   7 dnl This file can can be used in projects which are not available under
   8 dnl the GNU General Public License or the GNU Library General Public
   9 dnl License but which still want to provide support for the GNU gettext
  10 dnl functionality.
  11 dnl Please note that the actual code of the GNU gettext library is covered
  12 dnl by the GNU Library General Public License, and the rest of the GNU
  13 dnl gettext package package is covered by the GNU General Public License.
  14 dnl They are *not* in the public domain.
  15
  16 dnl Authors:
  17 dnl   Ulrich Drepper <drepper@cygnus.com>, 1996.
  18
  19 AC_PREREQ([2.50])
  20
  21 # Search path for a program which passes the given test.
  22
  23 dnl AM_PATH_PROG_WITH_TEST(VARIABLE, PROG-TO-CHECK-FOR,
  24 dnl   TEST-PERFORMED-ON-FOUND_PROGRAM [, VALUE-IF-NOT-FOUND [, PATH]])
  25 AC_DEFUN([AM_PATH_PROG_WITH_TEST],
  26 [
  27 # Prepare PATH_SEPARATOR.
  28 # The user is always right.
  29 if test "${PATH_SEPARATOR+set}" != set; then
  30   echo "#! /bin/sh" >conf$$.sh
  31   echo  "exit 0"   >>conf$$.sh
  32   chmod +x conf$$.sh
  33   if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
  34     PATH_SEPARATOR=';'
  35   else
  36     PATH_SEPARATOR=:
  37   fi
  38   rm -f conf$$.sh
  39 fi
  40
  41 # Find out how to test for executable files. Don't use a zero-byte file,
  42 # as systems may use methods other than mode bits to determine executability.
  43 cat >conf$$.file <<_ASEOF
  44 #! /bin/sh
  45 exit 0
  46 _ASEOF
  47 chmod +x conf$$.file
  48 if test -x conf$$.file >/dev/null 2>&1; then
  49   ac_executable_p="test -x"
  50 else
  51   ac_executable_p="test -f"
  52 fi
  53 rm -f conf$$.file
  54
  55 # Extract the first word of "$2", so it can be a program name with args.
  56 set dummy $2; ac_word=[$]2
  57 AC_MSG_CHECKING([for $ac_word])
  58 AC_CACHE_VAL([ac_cv_path_$1],
  59 [case "[$]$1" in
  60   [[\\/]]* | ?:[[\\/]]*)
  61     ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
  62     ;;
  63   *)
  64     ac_save_IFS="$IFS"; IFS=$PATH_SEPARATOR
  65     for ac_dir in ifelse([$5], , $PATH, [$5]); do
  66       IFS="$ac_save_IFS"
  67       test -z "$ac_dir" && ac_dir=.
  68       for ac_exec_ext in '' $ac_executable_extensions; do
  69         if $ac_executable_p "$ac_dir/$ac_word$ac_exec_ext"; then
  70           echo "$as_me: trying $ac_dir/$ac_word..." >&AS_MESSAGE_LOG_FD
  71           if [$3]; then
  72             ac_cv_path_$1="$ac_dir/$ac_word$ac_exec_ext"
  73             break 2
  74           fi
  75         fi
  76       done
  77     done
  78     IFS="$ac_save_IFS"
  79 dnl If no 4th arg is given, leave the cache variable unset,
  80 dnl so AC_PATH_PROGS will keep looking.
  81 ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
  82 ])dnl
  83     ;;
  84 esac])dnl
  85 $1="$ac_cv_path_$1"
  86 if test ifelse([$4], , [-n "[$]$1"], ["[$]$1" != "$4"]); then
  87   AC_MSG_RESULT([$][$1])
  88 else
  89   AC_MSG_RESULT([no])
  90 fi
  91 AC_SUBST([$1])dnl
  92 ])