blocks|key|1688154|text|在GCC中，您可以使用已弃用的属性声明函数，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1688155|void+myfunc()+__attribute__+((deprecated));|code-block|syntax|javascript|1688156|当在.c文件中使用该函数时，这将触发编译时警告。|1688157|你可以在http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html的“诊断指南”中找到更多信息。|offset|length|1688158|entityMap|0|LINK|mutability|MUTABLE|url|http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html^0|0|0|0|4|1A|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

In GCC you can declare your function with the attribute deprecated like this:

<pre><code>void myfunc() __attribute__ ((deprecated));
</code></pre>

This will trigger a compile-time warning when that function is used in a .c file.

You can find more info under "Diagnostic pragmas" at 
<a href="http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html" rel="noreferrer">http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html</a>

blocks|key|1473151|text|在处理可移植项目时，在某些情况下，您几乎不可避免地需要为一系列平台提供一段预处理的替代方案。#ifdef+this+#ifdef那个等等。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1473152|在这样的部分中，您可以很好地有条件地定义一种弃用符号的方法。我的偏好通常是定义一个“警告”宏，因为大多数工具链都支持自定义编译器警告。然后，您可以继续使用一个特定的警告宏，用于弃用等。对于支持专用弃用方法的平台，您可以使用该宏来代替警告。|1473153|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Dealing with portable projects it's almost inevitable that you at some point need a section of preprocessed alternatives for a range of platforms. #ifdef this #ifdef that and so on. 

In such a section you could very well conditionally define a way to deprecate symbols. My preference is usually to define a "warning" macro since most toolchains support custom compiler warnings. Then you can go on with a specific warning macro for deprecation etc.
For the platforms supporting dedicated deprecation methods you can use that instead of warnings.

blocks|key|1473215|text|这应该能起到作用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1473216|#ifdef+__GNUC__
#define+DEPRECATED(func)+func+__attribute__+((deprecated))
#elif+defined(_MSC_VER)
#define+DEPRECATED(func)+__declspec(deprecated)+func
#else
#pragma+message("WARNING:+You+need+to+implement+DEPRECATED+for+this+compiler")
#define+DEPRECATED(func)+func
#endif

...

//don't+use+me+any+more
DEPRECATED(void+OldFunc(int+a,+float+b));

//use+me+instead
void+NewFunc(int+a,+double+b);|code-block|syntax|javascript|1473217|但是，如果函数返回类型的名称中有逗号，例如std::pair<int,+int>，则会遇到问题，因为这将被预处理程序解释为将2个参数传递给已弃用的宏。在这种情况下，您必须对返回类型进行类型定义。|offset|length|style|CODE|1473218|编辑:更简单(但可能不太兼容)版本的here。|1473219|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/21265197/2651243^0|0|0|L|J|0|I|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@]|9|@$I|12|J|13|1|14]]|A|$]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

This should do the trick:

<pre><code>#ifdef __GNUC__
#define DEPRECATED(func) func __attribute__ ((deprecated))
#elif defined(_MSC_VER)
#define DEPRECATED(func) __declspec(deprecated) func
#else
#pragma message("WARNING: You need to implement DEPRECATED for this compiler")
#define DEPRECATED(func) func
#endif

...

//don't use me any more
DEPRECATED(void OldFunc(int a, float b));

//use me instead
void NewFunc(int a, double b);
</code></pre>

However, you will encounter problems if a function return type has a commas in its name e.g. <code>std::pair&lt;int, int&gt;</code> as this will be interpreted by the preprocesor as passing 2 arguments to the DEPRECATED macro. In that case you would have to typedef the return type.

Edit: simpler (but possibly less widely compatible) version <a href="https://stackoverflow.com/a/21265197/2651243">here</a>.

I have a method in an interface that I want to deprecate with portable C++.
When I Googled for this all I got was a Microsoft specific solution; <a href="https://docs.microsoft.com/en-us/cpp/preprocessor/deprecated-c-cpp?view=vs-2017" rel="noreferrer"><code>#pragma deprecated</code></a> and <a href="https://docs.microsoft.com/en-us/cpp/cpp/deprecated-cpp?view=vs-2017" rel="noreferrer"><code>__declspec(deprecated)</code></a>.
A second prize solution would be to <code>ifdef</code> a MSVC and a GCC solution.

C++ mark as deprecated

编译器

我的接口中有一个方法，我想用可移植的C++将其弃用。当我在谷歌上搜索这个的时候，我得到的只是一个微软特有的解决方案：和。二等奖的解决方案是ifdef一个MSVC和一个GCC解决方案。

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