Clang链接器不会查看LD_LIBRARY_PATH
[英]Clang linker does not look into LD_LIBRARY_PATH
问题描述
I am trying to build and link a C++, cmake-based project with clang (3.0). 
我正在尝试使用clang（3.0）构建和链接基于C ++，cmake的项目。 This project links to several libraries that are installed in a custom directory /my/dir/. 此项目链接到安装在自定义目录/ my / dir /中的多个库。 This directory is included in the LD_LIBRARY_PATH and LIBRARY_PATH environment variables. 该目录包含在LD_LIBRARY_PATH和LIBRARY_PATH环境变量中。 Project builds and links fine with g++. 项目使用g ++构建和链接。
The link command generated and executed by cmake looks like the following: 由cmake生成并执行的链接命令如下所示：
/usr/bin/clang++ -O3 stuff.cpp.o -o stuff -rdynamic -lmylib
ld then complains with the following message: ld然后抱怨以下消息：
/usr/bin/ld: cannot find -lmylib
The link command above runs fine whenever I manually add -L/my/dir/ . 每当我手动添加-L/my/dir/时，上面的链接命令就可以正常运行。 Is there a way to link without specifying the -L flag? 有没有指定-L标志链接的方法？
1 个解决方案
解决方案1
7 2012-09-25 12:33:13
The $LD_LIBRARY_PATH environment variable (and its various alternatives on other UNIX-based platforms) is used at runtime , not link time , to find libraries. $LD_LIBRARY_PATH环境变量（及其在其他基于UNIX的平台上的各种替代方案）在运行时使用 ，而不是链接时 ，用于查找库。
Using -L is the correct approach and cannot be avoided. 使用-L是正确的方法，无法避免。
Note: A better approach under Linux (you don't specify your platform so I'm guessing) is to correctly configure a file in /etc/ld.so.conf.d/ and avoid using $LD_LIBRARY_PATH altogether. 注意：在Linux下更好的方法（你没有指定你的平台，所以我猜）是在/etc/ld.so.conf.d/正确配置文件，并避免使用$LD_LIBRARY_PATH 。
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