Call engOpen in C code, launch functionnal matlab engine but hangs on C process

Question

Nathan Arbeid 2021-12-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1606060-call-engopen-in-c-code-launch-functionnal-matlab-engine-but-hangs-on-c-process

回答： Douglas 2024-5-1

采纳的回答： Nathan Arbeid

Hello, I'm testing matlab engine library with engdemo.c exemple.

Compiling the code directly with gcc:

$ export LD_LIBRARY_PATH="matlabroot/bin/glnxa64"

$ mv matlabroot/sys/os/glnxa64/libstdc++.so.6 matlabroot/sys/os/glnxa64/libstdc++.so.6.old (get rid of the clunky matlabroot/sys/os/glnxa64/libstdc++.so.6 in a dirty way and use /usr/lib/x86_64-linux-gnu/libstdc++.so.6 instead)

$ gcc -o engdemo -L matlabroot/bin/glnxa64 -lmx -leng -lm -lmex -lmat engdemo.c -Imatlabroot/extern/include

But when I run the executable, it calls engOpen(), launch a matlab command window but then hang inside the function. If I manually quit the matlab command window engOpen release the process but return NULL.

Thanks for your help!

EDIT: explicit "get rid of the clunky matlabroot/sys/os/glnxa64/libstdc++.so.6 in a dirty way and use /usr/lib/x86_64-linux-gnu/libstdc++.so.6 instead" sentence with the command used.

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Yongjian Feng 2021-12-9

Again, not a good idea. You renamed the libstdc++ shipped with matlab to force the process to use the system libstdc++. This will force matlab to use that lib as well. It can cause trouble.

Nathan Arbeid 2021-12-14