Add debug tracing for CURL_CHECK_DEF

#endif

    ]])

  ],[

    echo " " >&6

    echo "DEBUG: preproc IF-ACTION branch for $1 -----" >&6

    echo "DEBUG: ------- preproc source follows: " >&6

    sed 's/^/| /' conftest.$ac_ext >&6

    (eval "$ac_cpp conftest.$ac_ext") 2>conftest.yang2 1>conftest.yang1

    echo "DEBUG: ------- preproc STDOUT follows: " >&6

    sed 's/^/| /' conftest.yang1 >&6

    echo "DEBUG: ------- preproc STDERR follows: " >&6

    sed 's/^/| /' conftest.yang2 >&6

    echo "DEBUG: ------- preproc STDERR ends in above line. " >&6

    echo "DEBUG: ------- shell tmp_exp follows: " >&6

    tmp_exp=`eval "$ac_cpp conftest.$ac_ext" 2>/dev/null | \

      "$GREP" CURL_DEF_TOKEN 2>/dev/null | \

      "$SED" 's/.*CURL_DEF_TOKEN[[ ]]//' 2>/dev/null | \

      "$SED" 's/[["]][[ ]]*[["]]//g' 2>/dev/null`

    echo "DEBUG: $tmp_exp"  >&6

    if test "$tmp_exp" = "$1"; then

      tmp_exp=""

      echo "DEBUG: $tmp_exp"  >&6

    fi

    echo "DEBUG: ------- shell tmp_exp ends in above line. " >&6

  ],[

    echo " " >&6

    echo "DEBUG: preproc ELSE-ACTION branch for $1 -----" >&6

    echo "DEBUG: ------- preproc source follows: " >&6

    sed 's/^/| /' conftest.$ac_ext >&6

    (eval "$ac_cpp conftest.$ac_ext") 2>conftest.yang2 1>conftest.yang1

    echo "DEBUG: ------- preproc STDOUT follows: " >&6

    sed 's/^/| /' conftest.yang1 >&6

    echo "DEBUG: ------- preproc STDERR follows: " >&6

    sed 's/^/| /' conftest.yang2 >&6

    echo "DEBUG: ------- preproc STDERR ends in above line. " >&6

  ])

  rm -f conftest.yang1

  rm -f conftest.yang2

  if test -z "$tmp_exp"; then

    AS_VAR_SET([ac_HaveDef], [no])

    ifelse($3,,[AC_MSG_RESULT([no])])