blocks|key|1902466|text|make+-d|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1902467|应该会给你足够的信息来调试你的makefile。|unstyled|1902468|注意:分析输出需要花费一些时间和精力，但将输出加载到您最喜欢的编辑器中并进行搜索将会有很大帮助。|1902469|如果指定您感兴趣的特定目标，则可以大大减少调试输出量。因此，如果您只对dodgy目标感兴趣，而不是只对make+-d感兴趣，那么可以尝试：|offset|length|style|CODE|1902470|make+clean
make+-d+dodgy|1902471|(当然，假设您有一个clean目标)。|1902472|make+--debug与make+-d相同，但您也可以指定：|1902473|make+--debug=FLAGS|1902474|其中，标志可以是：|1902475|用于所有调试的|1902476|a+(对于basic+debugging.|unordered-list-item|1902477|v，与|1902478|a相同；对于basic+debugging.|1902479|v，与make+--debug).|1902480|b相同；对于隐式rules.|1902481|j，basic+debugging.|1902482|i用于隐式调用；对于makefile重新生成过程中的信息，与information.|1902483|m相同。|1902484|1902485|1902486|看起来make+--debug=b是满足您需求的最佳选择，如以下文字记录所示：|1902487|pax@paxbox>+cat+makefile
c:a+b
++++touch+c

pax@paxbox>+touch+a+b+;+make
touch+c

pax@paxbox>+make
make:+'c'+is+up+to+date.

pax@paxbox>+touch+a+;+make+--debug=b
GNU+Make+3.81
Copyright+(C)+2006++Free+Software+Foundation,+Inc.+Blah,+blah,+blah.
Reading+makefiles...
Updating+goal+targets....
+Prerequisite+'a'+is+newer+than+target+'c'.
Must+remake+target+'c'.
touch+c
Successfully+remade+target+file+'c'.|1902488|entityMap^0|0|0|0|Z|5|1F|7|0|0|A|5|0|0|C|D|7|0|0|0|0|0|1|0|0|1|1|0|1|1|0|1|3|C|1|0|1|1|0|1|1|0|1|1|0|1|1|0|0|3|E|0|0^^$0|@$1|2|3|4|5|6|7|1P|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|1Q|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|1R|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|1S|8|@$K|1T|L|1U|M|N]|$K|1V|L|1W|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|1X|8|@]|9|@]|A|$B|C]]|$1|Q|3|R|5|F|7|1Y|8|@$K|1Z|L|20|M|N]]|9|@]|A|$]]|$1|S|3|T|5|F|7|21|8|@$K|22|L|23|M|N]|$K|24|L|25|M|N]]|9|@]|A|$]]|$1|U|3|V|5|6|7|26|8|@]|9|@]|A|$B|C]]|$1|W|3|X|5|F|7|27|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|F|7|28|8|@]|9|@]|A|$]]|$1|10|3|11|5|12|7|29|8|@$K|2A|L|2B|M|N]]|9|@]|A|$]]|$1|13|3|14|5|12|7|2C|8|@$K|2D|L|2E|M|N]]|9|@]|A|$]]|$1|15|3|16|5|12|7|2F|8|@$K|2G|L|2H|M|N]]|9|@]|A|$]]|$1|17|3|18|5|12|7|2I|8|@$K|2J|L|2K|M|N]|$K|2L|L|2M|M|N]]|9|@]|A|$]]|$1|19|3|1A|5|12|7|2N|8|@$K|2O|L|2P|M|N]]|9|@]|A|$]]|$1|1B|3|1C|5|12|7|2Q|8|@$K|2R|L|2S|M|N]]|9|@]|A|$]]|$1|1D|3|1E|5|12|7|2T|8|@$K|2U|L|2V|M|N]]|9|@]|A|$]]|$1|1F|3|1G|5|12|7|2W|8|@$K|2X|L|2Y|M|N]]|9|@]|A|$]]|$1|1H|3|-4|5|F|7|2Z|8|@]|9|@]|A|$]]|$1|1I|3|-4|5|F|7|30|8|@]|9|@]|A|$]]|$1|1J|3|1K|5|F|7|31|8|@$K|32|L|33|M|N]]|9|@]|A|$]]|$1|1L|3|1M|5|6|7|34|8|@]|9|@]|A|$B|C]]|$1|1N|3|-4|5|F|7|35|8|@]|9|@]|A|$]]]|1O|$]]

<pre><code>make -d
</code></pre>

should give you more than enough information to debug your makefile.

Be warned: it will take some time and effort to analyze the output but loading the output into your favorite editor and doing searches will assist a lot.

You can greatly reduce the amount of debugging output if you specify the specific target you're interested in. So if you're only interested in the <code>dodgy</code> target, instead of just <code>make -d</code> which may make a hundred different things, try:

<pre><code>make clean
make -d dodgy
</code></pre>

(assuming you have a <code>clean</code> target of course).

The <code>make --debug</code> is identical to <code>make -d</code> but you can also specify:

<pre><code>make --debug=FLAGS
</code></pre>

where flags can be:

<ul>
<li><code>a</code> for all debugging (same as <code>make -d</code> and <code>make --debug</code>).</li>
<li><code>b</code> for basic debugging.</li>
<li><code>v</code> for slightly more verbose basic debugging.</li>
<li><code>i</code> for implicit rules.</li>
<li><code>j</code> for invocation information.</li>
<li><code>m</code> for information during makefile remakes.</li>
</ul>

It looks like <code>make --debug=b</code> is the best option for what you need, as shown in the following transcript:

<pre><code>pax@paxbox&gt; cat makefile
c:a b
 touch c

pax@paxbox&gt; touch a b ; make
touch c

pax@paxbox&gt; make
make: 'c' is up to date.

pax@paxbox&gt; touch a ; make --debug=b
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc. Blah, blah, blah.
Reading makefiles...
Updating goal targets....
 Prerequisite 'a' is newer than target 'c'.
Must remake target 'c'.
touch c
Successfully remade target file 'c'.
</code></pre>

blocks|key|1902540|text|你在找Make的“演练”吗？它将打印出make正在做什么，而不是实际这样做，让您看到发生了什么。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1902541|这个标志是-n，像make+-n一样使用它。|offset|length|style|CODE|1902542|entityMap^0|0|5|2|9|7|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]|$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|I|$]]

Are you looking for Make's "dry run"? It will print out what make is doing without actually doing so, allowing you to see what happens.

The flag is <code>-n</code>, use it like <code>make -n</code>.

blocks|key|495422|text|还有一个带有调试器和更好的跟踪/错误输出的GNU+make：Remake|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|495423|495424|演示第1部分：https://vimeo.com/232710891+|unordered-list-item|495425|演示第2部分：https://vimeo.com/97397484|495426|495427|这两个虽然仍然相关，但都有点老了。|495428|entityMap|0|LINK|mutability|MUTABLE|url|http://bashdb.sourceforge.net/remake/|1|https://vimeo.com/232710891|2|https://vimeo.com/97397484^0|U|6|0|0|0|7|R|1|0|7|Q|2|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|-4|5|6|7|12|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|13|8|@]|9|@$A|14|B|15|1|16]]|C|$]]|$1|H|3|I|5|G|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|J|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1C|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]|W|$5|P|Q|R|C|$S|X]]]]

There's also GNU make with a debugger and better trace/error output: <a href="http://bashdb.sourceforge.net/remake/" rel="nofollow noreferrer">Remake</a>

<ul>
<li>demo part 1: <a href="https://vimeo.com/232710891" rel="nofollow noreferrer">https://vimeo.com/232710891</a> </li>
<li>demo part 2: <a href="https://vimeo.com/97397484" rel="nofollow noreferrer">https://vimeo.com/97397484</a></li>
</ul>

Both of these, while still relevant, are a bit old.

blocks|key|495556|text|我通常做的不是像之前的回答者说的那样使用-d。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|495557|我也不是：|495558|495559|使用-p打印数据库，以查看创建了哪些规则。如果您有第二个展开规则，并且正在动态创建规则，尤其是递归make。|ordered-list-item|495560|大量使用$(info)函数。|495561|使用这篇DrDobbs文章Debugging+Makefiles|offset|length|495562|中描述的提示和技巧|495563|下面是我用来打印值的一些代码：|495564|define+pv
$(info+$(1)+[$(origin+$(1))]+:+>%7C$($(1))%7C<)
endef

define+pva
$(foreach+t,$(1),$(call+pv,$(t)))
endef

define+itemizer
$(foreach+t,$($(1)),$(info+$(t)))
endef|code-block|syntax|javascript|495565|entityMap|0|LINK|mutability|MUTABLE|url|http://www.drdobbs.com/tools/debugging-makefiles/197003338^0|0|0|0|0|0|D|J|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|17|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|18|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|19|8|@]|9|@$L|1A|M|1B|1|1C]]|A|$]]|$1|N|3|O|5|6|7|1D|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1E|8|@]|9|@]|A|$]]|$1|R|3|S|5|T|7|1F|8|@]|9|@]|A|$U|V]]|$1|W|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]]]

What I usually do is not go using -d as previous answerers said.

I either:

<ol>
<li>Use -p to print the database, to see what rules have been created. This is handy if you have second expansion rules and are creating rules on the fly, especially recursive make.</li>
<li>Heavy use of $(info) function.</li>
<li>Use the tips and trick described in this DrDobbs article <a href="http://www.drdobbs.com/tools/debugging-makefiles/197003338" rel="noreferrer">Debugging Makefiles</a></li>
</ol>

Below is some code I'm using for printing out values:

<pre><code>define pv
$(info $(1) [$(origin $(1))] : &gt;|$($(1))|&lt;)
endef

define pva
$(foreach t,$(1),$(call pv,$(t)))
endef

define itemizer
$(foreach t,$($(1)),$(info $(t)))
endef
</code></pre>

blocks|key|514283|text|有几次我也使用了this+(旧的但仍在运行的)交互式make+debugger，由John+Graham-Cumming开发|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|514284|entityMap|0|LINK|mutability|MUTABLE|url|http://www.cmcrossroads.com/article/interactive-gnu-make-debugger^0|8|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Few times I've also used <a href="http://www.cmcrossroads.com/article/interactive-gnu-make-debugger" rel="nofollow">this</a> (old but still working) interactive make debugger by John Graham-Cumming

blocks|key|514074|text|我正在使用make+gnu+make+template来定义每个目标的make规则；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|514075|模板就像编写规则的宏，这里对它们进行了解释：https://www.gnu.org/software/make/manual/html_node/Eval-Function.html|offset|length|514076|当您有一个make系统，其中包含一个核心makefile来为每个项目类型生成所有规则时，这个特性很有用；如果它说要做一个共享库，那么它会为其他类型的目标编写编译共享库的规则；依此类推。|514077|在本例中:如果将SHOW_RULES=1添加到make命令行，它还会显示由PROGRAM_target_setup_template生成的规则的文本；以及生成规则本身(使用eval)。|514078|+#+this+one+defines+the+target+for+real
+$(foreach+prog,+$(TARGETS),+$(eval+$(call+PROGRAM_target_setup_template,$(prog))))

+ifneq+"$(SHOW_RULES)"+""
+$(foreach+prog,+$(TARGETS),+$(info+$(call+PROGRAM_target_setup_template,$(prog))))
+endif|code-block|syntax|javascript|514079|514080|$(调用...+)调用template|unordered-list-item|514081|$(info+...+)打印模板替换的结果；(+eval将调用输出的解析并添加到当前的make文件中)|514082|514083|有关我的make文件的更多信息，请单击此处：http://mosermichael.github.io/cstuff/all/projects/2011/06/17/make-system.html|514084|entityMap|0|LINK|mutability|MUTABLE|url|https://www.gnu.org/software/make/manual/html_node/Eval-Function.html|1|http://mosermichael.github.io/cstuff/all/projects/2011/06/17/make-system.html^0|0|M|1X|0|0|0|0|0|0|0|0|0|M|25|1|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|F|3|G|5|6|7|1C|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1D|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1E|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1G|8|@]|9|@]|A|$]]|$1|S|3|T|5|R|7|1H|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1J|8|@]|9|@$D|1K|E|1L|1|1M]]|A|$]]|$1|X|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14]]|15|$5|10|11|12|A|$13|16]]]]

i am using make gnu make templates to define the make rules per target; 

Templates are like macros that write rules, they are explained here <a href="https://www.gnu.org/software/make/manual/html_node/Eval-Function.html" rel="nofollow">https://www.gnu.org/software/make/manual/html_node/Eval-Function.html</a>

this feature is useful when you have a make system that includes a core makefile to generate all rules per project type; if it says to do a shared library then it writes the rules to compile a shared library; etc. for other types of targets.

in this example: if you add SHOW_RULES=1 to the make command line it also shows the text of the rules that are generated by the PROGRAM_target_setup_template ; along with generating the rules themselves (with eval).

<pre><code> # this one defines the target for real
 $(foreach prog, $(TARGETS), $(eval $(call PROGRAM_target_setup_template,$(prog))))

 ifneq "$(SHOW_RULES)" ""
 $(foreach prog, $(TARGETS), $(info $(call PROGRAM_target_setup_template,$(prog))))
 endif
</code></pre>

<ul>
<li>$(call ... ) invokes the template</li>
<li>$(info ... ) prints the result of template substitution; ( eval would have invoked parsing of the output and addition to the current make file )</li>
</ul>

More about my make files here: <a href="http://mosermichael.github.io/cstuff/all/projects/2011/06/17/make-system.html" rel="nofollow">http://mosermichael.github.io/cstuff/all/projects/2011/06/17/make-system.html</a>

Is there a command line way in <code>make</code> to find out which of the prerequisites of a target is not updated?

Debugging GNU make

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

教程

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云智能顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云AI代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

功能1上新10个字符

功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符。

功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符。

功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符

功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符

功能4上新

文章&问答评论现已支持表情

全新交互，全新视觉，新增快捷键、悬浮工具栏、高亮块等功能并同时优化现有功能，全面提升创作效率和体验

社区富文本编辑器全新改版！诚邀体验～ 

精选全网热门MCP server，让你的AI更好用 🚀

💥开发者 MCP广场重磅上线！

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

聚焦“写作效率、视觉美观与运行性能”三方面进行全面升级，为您提供更高效、稳定的创作环境

社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

社区新版编辑器体验调研

在make中有没有一种命令行的方式来找出目标的哪些先决条件没有更新？

问调试GNU make
EN

回答 6

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问调试GNU makeEN

回答 6

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问调试GNU make
EN