无效的mex文件libarmadillo无法打开共享对象文件 [英] Invalid mex-file, libarmadillo, cannot open shared object file

问题描述

我知道有很多关于该主题的帖子，这可能是重复的，但我不这么认为.我的配置是:Matlab R2014b，clang 3.4，Ubuntu 14.04，armadillo-4.600.4.

I know there are a lot of posts about the topic, this might be a duplicate, but I don't think so. My config is: Matlab R2014b, clang 3.4, Ubuntu 14.04, armadillo-4.600.4.

我有一个Armadillo的本地安装(不是系统安装的，所以需要手动连接/链接)，在Matlab之外运行时效果很好. 我正在尝试使用Matlab中的Armadillo运行Mex文件.使用以下命令可以将其编译良好(简称为截断):

I have a local install (not system-wise, so including/linking manually) of Armadillo that works fine when outside of Matlab. I'm trying to run a Mex file using Armadillo from Matlab. It compiles fine using the command (truncated for short):

mex -compatibleArrayDims -outdir +mx -L/home/john/.local/arma/lib -larmadillo -I/home/john/.local/arma/include test_arma.cpp

问题是当我尝试运行它时，出现此错误:

Problem is when I try to run it I get this error:

Error using mx.test_arma
Invalid MEX-file '/path/to/+mx/test_arma.mexa64': libarmadillo.so.4: cannot open shared object file: No such file or directory

从启动Matlab的外壳程序中回显的环境变量LD_LIBRARY_PATH包含/home/john/.local/arma/lib(其中libarmadillo.so在其中)，我还使用setenv('LD_LIBRARY_PATH',...)在Matlab中手动添加了此路径.有什么我想念的吗?

The environment variable LD_LIBRARY_PATH echoed from the shell that started Matlab contains /home/john/.local/arma/lib (where libarmadillo.so is), and I also manually added this path within Matlab using setenv('LD_LIBRARY_PATH',...). Is there something I'm missing?

推荐答案

所以我找到了如何运行的方法.现在是段错误了:/而且我相当有信心这不是代码本身，因为我可以在Matlab之外编译和运行完全相同的代码.我将尝试找出问题所在，如果有问题，我将稍后在此发布我的冒险经历.

So I found out how to run it. Now it's segfaulting :/ And I'm fairly confident it's not the code itself, because I can compile and run the exact same code outside Matlab. I'll try to find out what's wrong, and if it's relevant, I'll post my adventures here later on.

针对运行问题； Matlab似乎使用变量LD_RUN_PATH在运行时加载共享库.在我的情况下，使用setenv将我的路径... /.local/arma/lib附加到LD_RUN_PATH可以达到目的.为您的评论/答案加油！

For the running problem; it seems that Matlab uses the variable LD_RUN_PATH for loading shared libraries at runtime. Appending my path ... /.local/arma/lib to LD_RUN_PATH using setenv did the trick in my case. Cheers for your comments/answers!

更新:我终于解决了这个问题，这是由于Matlab的BLAS/LAPACK库之间存在预期的字长不匹配(32/64位，即int32_t与int64_t)和犰狳的电话.我在此处发布了两种解决方案.

Update: I finally solved this, the problem was due to an expected word-size mismatch (32/64 bits, ie int32_t vs. int64_t) between Matlab's BLAS/LAPACK libraries and Armadillo's calls. There are two solutions that I posted here.

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