防止 IBM Visual Age C/C++ 中的符号被剥离对于 AIX
我正在构建一个共享库，我使用 IBM 的 VisualAge C/C++ 编译器将其动态加载（使用 dlopen）到我的 AIX 应用程序中。不幸的是，它似乎删除了必要的符号：
rtld: 0712-002 fatal error: exiting. rtld: 0712-001 Symbol setVersion__Q2_3CIF17VersionReporterFRCQ2_3std12basic_stringXTcTQ2_3std11char_traitsXTc_TQ2_3std9allocatorXTc__ was referenced from module ./object/AIX-6.1-ppc/plugins/plugin.so(), but a runtime definition of the symbol was not found.
共享库和加载共享库的应用程序都针对包含错误消息中提到的 VersionReporter 的静态库进行编译/链接。
要链接共享库，我使用以下选项：-bM:SRE -bnoentry -bexpall 要链接应用程序，我使用此选项： -brtl
是否有一个选项可以用来防止此符号在应用程序中被删除？我尝试过使用 IBM 文档中所述的 -nogc ，但这会导致共享库格式无效或应用程序无法链接（取决于我将其与哪一个一起使用）。
I'm building a shared library which I dynamically load (using dlopen) into my AIX application using IBM's VisualAge C/C++ compiler. Unfortunately, it appears to be stripping out necessary symbols:
rtld: 0712-002 fatal error: exiting. rtld: 0712-001 Symbol setVersion__Q2_3CIF17VersionReporterFRCQ2_3std12basic_stringXTcTQ2_3std11char_traitsXTc_TQ2_3std9allocatorXTc__ was referenced from module ./object/AIX-6.1-ppc/plugins/plugin.so(), but a runtime definition of the symbol was not found.
Both the shared library and the application which loads the shared library compile/link against the static library which contains the VersionReporter mentioned in the error message.
To link the shared library I'm using these options: -bM:SRE -bnoentry -bexpall
To link the application, I'm using this option: -brtl
Is there an option I can use to prevent this symbol from being stripped in the application? I've tried using -nogc as stated in the IBM docs, but that causes the shared library to be in an invalid format or the application to fail to link (depending on which one I use it with).
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
是的。这与特定语言或编译器没有真正的联系。例如，相同的通用技术也用于 gcc。 -bI:foo.exp 用于告诉链接器 foo.exp 中列出的符号将来自顶部的名称。同样，-BE:dog.exp 用于告诉链接器，dog.exp 中列出的符号已导出并可供其他人使用。
您可以看到 /bin/ldd 和 /bin/dump 可用于查看这些符号。
Yes. This is not really connected to a particular language or compiler. The same general technique is used for gcc for example. -bI:foo.exp is used to tell the linker that the symbols listed in foo.exp will come from the name at the top. Likewise, -BE:dog.exp is used to tell the linker that the symbols listed in dog.exp are exported and can be used by others.
You can see /bin/ldd and /bin/dump can be used to review these symbols.
我想通了。诀窍是使用导出列表，以便插件中使用但二进制文件中未使用的符号不会被删除。
然后在链接应用程序时使用： -brtl -bexpfull -bE:version.exp
这里有更多信息： 在 AIX 上开发和移植 C 和 C++ 应用程序。
I figured this out. The trick is to use an export list so that symbols used in the plugin but not used in the binary aren't stripped out.
And then when linking the application use: -brtl -bexpfull -bE:version.exp
There's more information here: Developing and Porting C and C++ Applications on AIX.