m4/progtest.m4

   1 # Search path for a program which passes the given test.
   2 # Ulrich Drepper <drepper@cygnus.com>, 1996.
   3
   4 # serial 1
   5
   6 dnl AM_PATH_PROG_WITH_TEST(VARIABLE, PROG-TO-CHECK-FOR,
   7 dnl   TEST-PERFORMED-ON-FOUND_PROGRAM [, VALUE-IF-NOT-FOUND [, PATH]])
   8 AC_DEFUN(AM_PATH_PROG_WITH_TEST,
   9 [# Extract the first word of "$2", so it can be a program name with args.
  10 set dummy $2; ac_word=[$]2
  11 AC_MSG_CHECKING([for $ac_word])
  12 AC_CACHE_VAL(ac_cv_path_$1,
  13 [case "[$]$1" in
  14   /*)
  15   ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
  16   ;;
  17   *)
  18   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  19   for ac_dir in ifelse([$5], , $PATH, [$5]); do
  20     test -z "$ac_dir" && ac_dir=.
  21     if test -f $ac_dir/$ac_word; then
  22       if [$3]; then
  23         ac_cv_path_$1="$ac_dir/$ac_word"
  24         break
  25       fi
  26     fi
  27   done
  28   IFS="$ac_save_ifs"
  29 dnl If no 4th arg is given, leave the cache variable unset,
  30 dnl so AC_PATH_PROGS will keep looking.
  31 ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
  32 ])dnl
  33   ;;
  34 esac])dnl
  35 $1="$ac_cv_path_$1"
  36 if test -n "[$]$1"; then
  37   AC_MSG_RESULT([$]$1)
  38 else
  39   AC_MSG_RESULT(no)
  40 fi
  41 AC_SUBST($1)dnl
  42 ])