CODEWITHSUNDEEP
swigdynamic-linking
V.S.
V.S.

Reputation: 3004

Linking scope of loaded symbols when using swig to wrap C++ for python

I have a C++ library that I am wrapping with SWIG to make accessible in python. It is my understanding (from experience) that when SWIG wraps a C++ library in python, upon loading it places the C++ library symbols in a "local" scope. That is - a scope which does not enable future dynamically linked libraries to find the symbols.

(I'm getting this definition of "local" from man dlopen(3) )

Is there any way to get SWIG to place these symbols into the "global" scope, such that any future dynamically linked libraries can find them?

Upvotes: 2

Views: 414

Answers (1)

Flexo - Save the data dump
Flexo - Save the data dump

Reputation: 88711

You can make python dlopen shared objects with the RTLD_GLOBAL flag by calling setdlopenflags in sys, e.g.:

sys.setdlopenflags(dl.RTLD_NOW | dl.RTLD_GLOBAL)

before your module is loaded. (There's a discussion on swig-users about this)

Upvotes: 2

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