blocks|key|266351|text|"${src}.out"应该可以很好地工作，所以您可以编写set(NAME+"${src}.out")并在需要的任何地方使用${NAME}。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|266352|entityMap^0|0|C|T|M|1Q|7|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

<code>"${src}.out"</code> should work fine, so you can write <code>set(NAME "${src}.out")</code> and use <code>${NAME}</code> wherever you need to.

blocks|key|266400|text|如果您只想处理字符串值，请参阅@nonexplosive's+answer。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|266401|但是，如果希望在CMakeLists.txt中包含Cmake变量并将该变量设置为某个值，请使用：string()表示Cmake+3.0%2B+(https://cmake.org/cmake/help/v3.0/command/string.html)或set()表示Cmake+2.0%2B。|style|CODE|266402|您有两个选项的原因是因为较旧的cmake不支持CONCAT特性。|266403|示例CMakeLists.txt：|266404|cmake_minimum_required(VERSION+2.8.11)
project(Hello)
string(CONCAT+x+"hello"+"goodbye")
set(y+"hellogoodbye")
message(STATUS+"DEBUG:+x=${x}")
message(STATUS+"DEBUG:+y=${y}")|code-block|syntax|javascript|266405|完整标准输出：|266406|--+DEBUG:+x=hellogoodbye
--+DEBUG:+y=hellogoodbye
--+Configuring+done
--+Generating+done
--+Build+files+have+been+written+to:+/home/_______/testing/_______|266407|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/18003562/52074|1|https://cmake.org/cmake/help/v3.0/command/string.html|2|https://cmake.org/cmake/help/v2.8.12/cmake.html#command:set^0|F|M|0|0|8|E|1C|8|3H|5|1Y|1H|1|3H|5|2|0|N|6|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@$A|17|B|18|1|19]]|C|$]]|$1|D|3|E|5|6|7|1A|8|@$A|1B|B|1C|F|G]|$A|1D|B|1E|F|G]|$A|1F|B|1G|F|G]]|9|@$A|1H|B|1I|1|1J]|$A|1K|B|1L|1|1M]]|C|$]]|$1|H|3|I|5|6|7|1N|8|@$A|1O|B|1P|F|G]]|9|@]|C|$]]|$1|J|3|K|5|6|7|1Q|8|@]|9|@]|C|$]]|$1|L|3|M|5|N|7|1R|8|@]|9|@]|C|$O|P]]|$1|Q|3|R|5|6|7|1S|8|@]|9|@]|C|$]]|$1|S|3|T|5|N|7|1T|8|@]|9|@]|C|$O|P]]|$1|U|3|-4|5|6|7|1U|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]|12|$5|X|Y|Z|C|$10|13]]|14|$5|X|Y|Z|C|$10|15]]]]

if you just want to deal with a string value see <a href="https://stackoverflow.com/a/18003562/52074">@nonexplosive's answer</a>.

However if you wish to have a Cmake variable in your <code>CMakeLists.txt</code> and set that variable to some value do use either: [<code>string()</code>] for Cmake 3.0+ (<a href="https://cmake.org/cmake/help/v3.0/command/string.html" rel="noreferrer">https://cmake.org/cmake/help/v3.0/command/string.html</a>) or <a href="https://cmake.org/cmake/help/v2.8.12/cmake.html#command:set" rel="noreferrer"><code>set()</code></a> for Cmake 2.0+.

The reason you have two options is because older cmake doesn't support the <code>CONCAT</code> feature.

Example CMakeLists.txt:

<pre><code>cmake_minimum_required(VERSION 2.8.11)
project(Hello)
string(CONCAT x "hello" "goodbye")
set(y "hellogoodbye")
message(STATUS "DEBUG: x=${x}")
message(STATUS "DEBUG: y=${y}")
</code></pre>

Full stdout:

<pre><code>-- DEBUG: x=hellogoodbye
-- DEBUG: y=hellogoodbye
-- Configuring done
-- Generating done
-- Build files have been written to: /home/_______/testing/_______
</code></pre>

blocks|key|266439|text|三种典型的CMake字符串连接方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|266440|虽然这个问题的答案最好是通过set或string来处理，但如果您想要连接带有任意字符的字符串，还有第三种可能性是list。|offset|length|style|CODE|266441|set()|266442|只需像bash中那样组合字符串|266443|set(FILE+file)
set(FILE_TXT+${FILE}.txt)
message(STATUS+"FILE_TXT:+${FILE_TXT}")|code-block|syntax|javascript|266444|字符串(CONCAT)|266445|将所有输入参数连接在一起，并将结果存储在命名的输出变量中。|266446|string(CONCAT++[...])|266447|string(CONCAT+MULTI+"xxxx"+"YYYY"+"xxxx")
message(STATUS+"MULTI:+${MULTI}")|266448|列表(追加)|266449|将元素追加到列表中。|266450|list(APPEND++[+...])|266451|当涉及到编译器标志之类的东西时，这是首选的工具。CMake中的列表只是用分号分隔的字符串，当您引用它们时，您会得到用分号连接的列表。|266452|list(APPEND+FLAGS+"-D+option1")
list(APPEND+FLAGS+"-D+option2")
list(APPEND+FLAGS+"-D+option3")
list(JOIN+FLAGS+"+"+FLAGS)
message(STATUS+"FLAGS:+"+${FLAGS})|266453|entityMap|0|LINK|mutability|MUTABLE|url|https://cmake.org/cmake/help/latest/command/string.html#concat|1|https://cmake.org/cmake/help/latest/command/list.html?highlight=list#append^0|0|E|3|I|6|1K|4|0|0|0|0|0|0|0|L|0|0|0|0|0|0|K|1|0|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1J|8|@$D|1K|E|1L|F|G]|$D|1M|E|1N|F|G]|$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1R|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1S|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|1T|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1U|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1V|8|@]|9|@$D|1W|E|1X|1|1Y]]|A|$]]|$1|W|3|X|5|N|7|1Z|8|@]|9|@]|A|$O|P]]|$1|Y|3|Z|5|6|7|20|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|21|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|22|8|@]|9|@$D|23|E|24|1|25]]|A|$]]|$1|14|3|15|5|6|7|26|8|@]|9|@]|A|$]]|$1|16|3|17|5|N|7|27|8|@]|9|@]|A|$O|P]]|$1|18|3|-4|5|6|7|28|8|@]|9|@]|A|$]]]|19|$1A|$5|1B|1C|1D|A|$1E|1F]]|1G|$5|1B|1C|1D|A|$1E|1H]]]]

<h2>Three typical CMake string concatenation methods</h2>
While the answer to this particular question will be best handled via <code>set</code> or <code>string</code>, there is a third possibility which is <code>list</code> if you want to join strings with an arbitrary character.
<h3>set()</h3>
Just combine strings like in bash
<pre><code>set(FILE file)
set(FILE_TXT ${FILE}.txt)
message(STATUS &quot;FILE_TXT: ${FILE_TXT}&quot;)
</code></pre>
<h3>string(CONCAT)</h3>
Concatenate all the input arguments together and store the result in the named output variable.
<a href="https://cmake.org/cmake/help/latest/command/string.html#concat" rel="noreferrer">string(CONCAT [...])</a>
<pre><code>string(CONCAT MULTI &quot;xxxx&quot; &quot;YYYY&quot; &quot;xxxx&quot;)
message(STATUS &quot;MULTI: ${MULTI}&quot;)
</code></pre>
<h3>list(APPEND)</h3>
Appends elements to the list.
<a href="https://cmake.org/cmake/help/latest/command/list.html?highlight=list#append" rel="noreferrer">list(APPEND [ ...])</a>
When it comes to things like compiler flags, this is the tool of choice. Lists in CMake are just semicolon separated strings and when you quote them, you get the list joined with semicolons.
<pre><code>list(APPEND FLAGS &quot;-D option1&quot;)
list(APPEND FLAGS &quot;-D option2&quot;)
list(APPEND FLAGS &quot;-D option3&quot;)
list(JOIN FLAGS &quot; &quot; FLAGS)
message(STATUS &quot;FLAGS: &quot; ${FLAGS})
</code></pre>

blocks|key|49870|text|这只是某种程度上的相关，但我在寻找如何连接路径时找到了这个答案，以便当一个路径以斜杠结尾，另一个以斜杠开头时，您不会得到双斜杠或重复斜杠？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|49871|如果SOME_VAR="/foo/"和SOME_OTHER_VAR="/bar/"|offset|length|style|CODE|49872|FILE(TO_CMAKE_PATH+"${SOME_VAR}/${SOME_OTHER_VAR}")+|code-block|syntax|javascript|49873|将为您提供/foo/bar/|49874|如果您希望它给出本地路径分隔符(即windows中的反斜杠)，则使用TO_NATIVE_PATH而不是TO_CMAKE_PATH|49875|entityMap^0|0|2|G|J|M|0|0|5|9|0|Y|E|1F|D|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]|$D|W|E|X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@$D|13|E|14|F|G]|$D|15|E|16|F|G]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$]]

This is only sort of related, but I found this answer when looking for how do you concatenate paths so that you don't get double or duplicate slashes if one ends in a slash and the other begins with one?

if <code>SOME_VAR="/foo/"</code> and <code>SOME_OTHER_VAR="/bar/"</code>

<pre><code>FILE(TO_CMAKE_PATH "${SOME_VAR}/${SOME_OTHER_VAR}") 
</code></pre>

will give you <code>/foo/bar/</code>

if you want it to give you native path delimiters (i.e. backslashes in windows), then use <code>TO_NATIVE_PATH</code> instead of <code>TO_CMAKE_PATH</code>

Is there a way to concatenate strings in cmake?

I have a folder that only contains .cpp files with main methods. I thought this would be easy by just using a foreach through all src files. This is what I've got this far:

<pre><code>project(opengl-tutorial)
cmake_minimum_required(VERSION 2.8)

aux_source_directory(. SRC_LIST)

add_definitions(
 --std=c++11
)

foreach (src ${SRC_LIST})
 # name = ${src} + ".out"
 add_executable(${name} ${src})
 target_link_libraries(${name} GL GLU GLEW glfw)
endforeach(src ${SRC_LIST})
</code></pre>

How can I do what's described in the comment?

How do you concatenate string in cmake

编译器

在cmake中有没有连接字符串的方法？我有一个文件夹，其中只包含带有main方法的.cpp文件。我认为只需使用foreach遍历所有src文件，这会很容易。这就是我到目前为止所得到的：project(opengl-tutorial)cmake_minimum_required(VERSION 2.8)aux_sourc...

问如何在cmake中连接字符串
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在cmake中连接字符串EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在cmake中连接字符串
EN