Missing __attribute__ ((__visibility__("default"))) with Clang on FreeBSD 11.1 #173

Dear Boost.Python developpers,

First of all, thank you for your wonderfull work. I am using boost.python for several years with great satisfaction.

The issue is mostly described in the title: if we use the flag -fvisibility=hidden, the "init" function of a module is not visible and thus can not be loaded in python.

The issue is not present on Linux and gcc, because attribute ((visibility("default"))) is added to the declaration of this function.

A quick and dirty workaround is to compile the code with the BOOST_PYTHON_USE_GCC_SYMBOL_VISIBILITY flag (see boost/python/config/detail.hpp).

I hope this helps.

Best regards,

Thomas Helfer