blocks|key|3538769|text|它意味着将“未定义”符号的用法(例如，一段代码在共享库中调用函数的点)与实际符号(例如，共享库文件中的实际函数的代码)的位置匹配，根据需要加载库。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3538770|术语既用于编译时与静态库的链接，也用于运行时的动态库。|3538771|在C%2B%2B中，如果库尚未加载，解析共享库中变量的符号应该会构造该库中的所有内容。|3538772|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

It means to match a usage of an "undefined" symbol (e.g. a point where a piece of code calls a function in a shared library) with the location of the actual symbol (e.g. an actual function's code in a shared library file), loading libraries as needed.

The terminology is used for both linking with static libraries at compile time and dynamic libraries at run time.

In C++, resolving a symbol for a variable in a shared library should construct everything in that library if the library was not already loaded.

blocks|key|3538777|text|较大的程序由单独编译的模块组成。您可以决定将数据库内容放在一个模块中，在另一个模块中打印，将用户界面放在另一个模块中。第一步将每个模块编译成一个所谓的对象文件。一种中间的步骤。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3538778|最后一步是将所有这些对象“链接”在一起，链接器可能会得出这样的结论:一个对象中的符号试图访问另一个对象中的值或函数，却发现它不存在。在这种情况下，链接器无法“解析”引用。|3538779|解析的实际‘动作’是计算链接器必须放在一个模块中的地址，以便它能够正确地访问另一个模块中的某个内容。|3538780|注意，这通常是在编译语言(如C、C%2B%2B等)和链接时出现的问题。它出现在最后一个实例中，在所有模块都被转换为对象之后。|3538781|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Larger programs consists of modules, compiled separately. You might decide putting you database things in one, printing in other, and the user interface in another modules. The first steps compile each module into a so-called object file. A sort of intermediate step.

The final step is to 'link' all these objects together, and it can happen that the linker comes to the conclusion that a symbol in one object is trying to access a value or function in another and finds it doesn't exist. In that case the linker is no able to 'resolve' the reference.

The actual 'action' of resolving is calculating the address the linker has to put in one module, so that it can access correctly something in another module.

Note that is typically a problem that appears in compiled languages like C, C++ and such, and at the time of linking. It appears at the last instance, after all modules have been converted to objects.

blocks|key|3538821|text|声明的函数(例如，在标头中)，但未实现的函数(编译器不知道该函数的功能)将在lib中得到处理。这就是“解析符号”的意思。“符号”是由库导出的函数的名称。当在代码或导入的库中找不到函数的实现时，链接器将“无法解析符号”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3538822|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Functions that are declared (in headers for instance) but not implemented (what the function does is unknown to the compiler) will be looked after in the libs. Thats what means "resolving symbols". The "symbols" are the names given to the functions being exported by the libs. The linker will "fail to resolve a symbol" whenever the implementation of a function cannot be found in the code or in any imported lib.

The man page for ld-linux.so refers to resolving symbols but doesn't explain this concept.

<a href="http://man7.org/linux/man-pages/man8/ld.so.8.html" rel="nofollow noreferrer">http://man7.org/linux/man-pages/man8/ld.so.8.html</a>

I think the phrase in question is also used outside of ld and linux.

What does it mean to resolve a symbol? I've seen this phrase a lot but I've never seen a definition.

What led to this question is that I'm sure if resolving a symbol for a variable will guarantee construction of the variable or if resolving a symbol just notes the existence of a variable. The question is related to this one:

<a href="https://stackoverflow.com/questions/24917581/force-eager-initialization-of-static-variables-in-dynamically-linked-libs">Force Eager Initialization of Static Variables in Dynamically Linked Libs</a>

What does it mean to resolve a symbol?

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。

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因此，ld-linux.so的手册页提到了解析符号，但并没有解释这个概念。我认为这个短语也是在ld和linux之外使用的。解析一个符号意味着什么？我见过很多这句话，但我从未见过一个定义。导致这个问题的原因是，我确信，解析变量的符号是否会保证变量的构造，或者解析符号只会注意到变量的存在。这个问题与此有关：

问解析一个符号意味着什么？
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问解析一个符号意味着什么？EN