Linking mex files to boost libraries

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Oliver Woodford 2014-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/132145-linking-mex-files-to-boost-libraries

评论： Oliver Woodford 2014-6-3

Boost libraries have awkward names. They depend on all sorts of things: compiler version, library type, boost version, etc. E.g.: libboost_system-vc100-mt-1_51.lib. To help with this, boost functions tell the linker what libraries to include using a directive such as:

#pragma comment(lib, "libboost_system-vc100-mt-1_51.lib")

Now this is fine if the linker knows where to find the library. However, I'm building a mex file as follows:

mex -LMY_BOOST_LIB_DIR my_mex.cpp

(where MY_BOOST_LIB_DIR is correct for my system) and I get the error:

LINK : fatal error LNK1104: cannot open file 'libboost_system-vc100-mt-1_51.lib'

However, when I use:

mex -LMY_BOOST_LIB_DIR -llibboost_system-vc100-mt-1_51 my_mex.cpp

it works fine.

The issue is that I want to use MSVC's (as I'm on a Windows PC using that compiler) autolinking feature, but MATLAB's mex function doesn't appear to be passing the linker directory information through. Do you know a way round this?

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José-Luis 2014-6-2

Also, beware that Matlab uses boost itself. This means that their version of boost is polluting the path. This makes for all kinds of fun when linking to another release.

I had that problem once and my solution was to give the entire path when linking. I was not using mex though.

Oliver Woodford 2014-6-3