符号版本和对dlsym [英] symbol versioning and dlsym

问题描述

我使用加载pthread库在我的程序的dlopen ，并获取处理程序在pthread_create 和在pthread_join 使用则dlsym 。

I load the pthread library in my program using dlopen, and fetch handlers to pthread_create and pthread_join using dlsym.

我怎么能保证，无论是处理程序的兼容版本？我不在乎，如果符号的新版本或旧版本。我只是想，不管在pthread_create 我用用好工作在pthread_join ，我得到的。

How can I ensure that both the handlers are of a compatible version? I do not care if the symbols are of new version or old versions. I just want that whatever pthread_create I use to work well with the pthread_join that I get.

我知道有一个 dlvsym 来，我可以通过明确的版本号，但我不关心具体的版本号，因为我希望我的code是独立库的版本。

I know there is a dlvsym to which I can pass explicit version number, but I do not care about exact version numbers as I want my code to be independent of library versions.

推荐答案

该版本存在的唯一理由是在ABI兼容性差的企图与反对的古的glibc的版本编译的程序，这将没有实际工作反正。 （他们已经在某种程度上，据我可以告诉大家，不能兼容默默打破ABI至少一次。）只是忽略它。

The only reason the versioning exists is for a poor attempt at ABI-compatibility with programs compiled against ancient versions of glibc, which will not actually work anyway. (They've silently broken the ABI at least once in a way that, as far as I can tell, cannot be compatible.) Just ignore it.

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