possibly undefined macro: AC_MSG_ERROR If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation.

这个错误通常发生在使用Autoconf时，它表示在宏中引用了未定义的宏。要解决这个问题，你可以按照以下步骤进行操作：

1. 确保你已经正确地定义了相关的宏。检查你的代码中是否存在拼写错误或语法错误。
2. 确保你已经正确地包含了相关的宏定义文件。检查你的代码中是否包含了正确的头文件或宏定义文件。
3. 如果你确定你的代码是正确的，并且仍然收到该错误消息，请检查你的Autoconf版本。有些版本可能对宏定义有限制或不支持某些特定的宏。

如果以上步骤仍然无法解决问题，建议你查阅Autoconf的官方文档，寻找相关的解决方案或者向开发社区寻求帮助。

相关问题

<FrameLayout android:id="@+id/fl_retry" android:layout_width="match_parent" android:layout_height="150dp" android:layout_centerInParent="true" android:layout_gravity="bottom" android:layout_margin="10dp" android:background="@drawable/bnav_tab_background" android:visibility="gone" tools:visibility="visible"> <LinearLayout android:id="@+id/ll_retry" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:gravity="center" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/bnav_shape_du" android:gravity="center" android:text="@string/du" android:textColor="#d2d2d2" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:text="@string/retry_text" android:textColor="#3385ff" /> </LinearLayout> </FrameLayout> 以上代码出现 This `LinearLayout` layout or its `FrameLayout` parent is possibly unnecessary; transfer the `background` attribute to the other view 帮我改一下

<Layout
android:id="@+id/fl_retry"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_centerInParent="true"
android:layout_margin="10dp"
android:visibility="gone"
tools:visibility="visible">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/bnav_shape_du"
android:gravity="center"
android:text="@string/du"
android:textColor="#d2d2d2" />

<TextView
android:id="@+id/tv_retry_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="@string/retry_text"
android:textColor="#3385ff" />
</FrameLayout>

根据警告信息，将背景属性转移到其他视图上，这里我将背景属性移植到了第一个 TextView 上，同时将第二个 TextView 加入了 ID，方便在代码中引用。

[Place 30-575] Sub-optimal placement for a clock-capable IO pin and MMCM pair. If this sub optimal condition is acceptable for this design, you may use the CLOCK_DEDICATED_ROUTE constraint in the .xdc file to demote this message to a WARNING. However, the use of this override is highly discouraged. These examples can be used directly in the .xdc file to override this clock rule. < set_property CLOCK_DEDICATED_ROUTE BACKBONE [get_nets sys_clk_IBUF] > sys_clk_IBUF_inst (IBUF.O) is locked to IOB_X1Y74 instance_name/inst/mmcm_adv_inst (MMCME2_ADV.CLKIN1) is provisionally placed by clockplacer on MMCME2_ADV_X1Y2 The above error could possibly be related to other connected instances. Following is a list of all the related clock rules and their respective instances. Clock Rule: rule_mmcm_bufg Status: PASS Rule Description: An MMCM driving a BUFG must be placed on the same half side (top/bottom) of the device instance_name/inst/mmcm_adv_inst (MMCME2_ADV.CLKFBOUT) is provisionally placed by clockplacer on MMCME2_ADV_X1Y2 and instance_name/inst/clkf_buf (BUFG.I) is provisionally placed by clockplacer on BUFGCTRL_X0Y31

Based on the provided information, it seems that there is a sub-optimal placement for a clock-capable IO pin and MMCM pair in your design. If this condition is acceptable, you can use the CLOCK_DEDICATED_ROUTE constraint in the .xdc file to demote the message to a WARNING. However, using this override is highly discouraged.

To override this clock rule, you can add the following line in the .xdc file:

set_property CLOCK_DEDICATED_ROUTE BACKBONE [get_nets sys_clk_IBUF]

Please note that this error could possibly be related to other connected instances. The related clock rule "rule_mmcm_bufg" seems to be passing, but it's important to review all the clock rules and their respective instances to ensure proper placement.

If you have any further questions or need additional assistance, feel free to ask.