从LD中隐藏共享对象中的符号 [英] Hide symbol(s) in Shared Object from LD

问题描述

我有两个第三方库偶尔会导出相同的符号名称。当可执行文件加载时， ld 通常会选择错误的文件，结果导致崩溃。我不能做太多关于这些库的内容，所以可能有一种方法来指导 ld 如何找到适当的imlementation？

OS - Solaris 10，我的程序是由autoconf / autotools / gcc构建的，冲突的库是 libclntsh （Oracle驱动程序的一部分）和OpenLDAP。遗憾的是，我不能使用Oracle的LDAP客户端实现 - 它缺少OpenLDAP的许多功能。

编辑：链接如下：libclntsh.so-> A.so- > MAIN <-B.so <-libldap_r.so

解决方案

如果您不需要在两个共享库中链接编译时间（从你的问题中不清楚），你可以使用共享库 -Bdirect 。这将记录共享库中所有符号的位置;如果在运行时出现符号的第二个定义（来自其他共享库），它将被忽略。

I have two third-party libraries occasionally having the same symbol name exported. When the executable is loaded, ld usually picks the wrong one and I getting crash as a result. I cannot do too much about the content of these libraries, so may be there is a way to instruct ld how to find the proper imlementation ?

OS - Solaris 10, my program is built by autoconf/autotools/gcc, conflicting libraries are libclntsh (part of Oracle driver) and OpenLDAP. Unfortuinately, I cannot use Oracle's implementation of LDAP client - it lacks many features OpenLDAP has.

Edited: The linkage is as following: libclntsh.so->A.so->MAIN<-B.so<-libldap_r.so

解决方案

If you don't need to link in both shared libraries at compile time (which isn't clear from your question), you can use -Bdirect for the shared library. This will record for all symbols from the shared library where they had been found; if then at run-time a second definition of the symbol appears (from the other shared library), it will be ignored.

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