curl-compilers.m4

    ac_var_strip_word="no"
    for word2 in [$2]; do
      if test "$word1" = "$word2"; then
        ac_var_strip_word="yes"
      fi
    done
    if test "$ac_var_strip_word" = "no"; then
      ac_var_stripped="$ac_var_stripped $word1"
    fi
  done
  dnl squeeze whitespace out of result
  [$1]=`eval echo $ac_var_stripped`
])