为什么不能LD找到在/etc/ld.so.conf文件路径库？ [英] Why can't ld find library from path in /etc/ld.so.conf?

问题描述

我要添加的/ opt / Vertica的/ lib64目录进入系统库的路径，所以我做以下步骤：结果
（1）添加的/ opt / Vertica的/ lib64目录到 /etc/ld.so.conf中，并运行 ldconfig的，结果
（2）检查它：

I want to add the /opt/vertica/lib64 into system library paths, so I do the following steps:
(1) Add the /opt/vertica/lib64 into/etc/ld.so.conf, and run ldconfig,
(2) Check it:

 bash# ldconfig -p | grep vertica
    libverticaodbc.so (libc6,x86-64) => /opt/vertica/lib64/libverticaodbc.so
    ......

但是当我运行 LD -lverticaodbc --verbose 命令：

==================================================
attempt to open /usr/x86_64-redhat-linux/lib64/libverticaodbc.so failed
attempt to open /usr/x86_64-redhat-linux/lib64/libverticaodbc.a failed
attempt to open /usr/local/lib64/libverticaodbc.so failed
attempt to open /usr/local/lib64/libverticaodbc.a failed
attempt to open /lib64/libverticaodbc.so failed
attempt to open /lib64/libverticaodbc.a failed
attempt to open /usr/lib64/libverticaodbc.so failed
attempt to open /usr/lib64/libverticaodbc.a failed
attempt to open /usr/x86_64-redhat-linux/lib/libverticaodbc.so failed
attempt to open /usr/x86_64-redhat-linux/lib/libverticaodbc.a failed
attempt to open /usr/lib64/libverticaodbc.so failed
attempt to open /usr/lib64/libverticaodbc.a failed
attempt to open /usr/local/lib/libverticaodbc.so failed
attempt to open /usr/local/lib/libverticaodbc.a failed
attempt to open /lib/libverticaodbc.so failed
attempt to open /lib/libverticaodbc.a failed
attempt to open /usr/lib/libverticaodbc.so failed
attempt to open /usr/lib/libverticaodbc.a failed
ld: cannot find -lverticaodbc

的 LD 没有找到 verticaodbc 从的/ opt / Vertica的/ lib64的。

任何人都可以提供一些线索？非常感谢！

Could anyone give some clues? Thanks very much!

推荐答案

LD 是静态的的连接。 ld.so 是的动态连接​​（和 ldconfig的＆放大器; LDD 都涉及到动态链接程序）。

ld is the static linker. ld.so is the dynamic linker (and ldconfig & ldd are related to the dynamic linker).

您需要添加 -L /选择/ Vertica的/ lib64目录/ 在你的 LD 参数的链接的时间（你通常应该链接的gcc 或 G ++ ）。实事求是地讲，这意味着编辑的基础设施建设-e.g.你的的Makefile - 增加了几十个字符

You need to add -L/opt/vertica/lib64/ to your ld arguments at link time (and you usually should link with gcc or g++). Practically speaking, this means editing your build infrastructure -e.g. your Makefile - to add a few dozen characters.

请参阅 ld.so（8）， LDD（1），的 LD（1），的 ldconfig的（8）

阅读也 Drepper的文章：如何写共享库的 程序库方法文档＆安培; 莱文的书：链接器和加载的

Read also Drepper's paper: How To Write Shared Libraries, Program Library HowTo & Levine's book: Linkers and Loaders

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