Hello all: I haven't heard anything back about this patch. As far as I know, boost python will not work with gcc 4.x and the visibility flags without changes similar to this. Is this the correct place to post such a patch? Is there some other known workaround that I am not aware of? Thanks, Allen Allen Bierbaum wrote:

It looks like the current version of Boost.Python has a small bug when using the visibility options of gcc 4.0 (i.e. -fvisibility=hidden). I have attached a patch that will fix the problem. It looks like when the code was originally added to test for the GCC version it didn't take into account non 3.x version numbers. This patch should take care of that.

Note: This bug rears its head by hiding the extern C initmodule() when you compile a Boost.Python module with "-fvisibility=hidden". Thus the module fails to import into python because the symbol is not found.

Hopefully this should fix things up for everyone.

-Allen

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Index: boost/python/module_init.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/python/module_init.hpp,v retrieving revision 1.6 diff -u -r1.6 module_init.hpp --- boost/python/module_init.hpp 20 Sep 2004 12:47:31 -0000 1.6 +++ boost/python/module_init.hpp 23 Aug 2005 21:27:15 -0000 @@ -42,7 +42,7 @@ } \ void init_module_##name()

-# elif (defined(__GNUC__) && __GNUC__ >= 3 && __GNUC_MINOR__ >=5) +# elif (defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >=5)))

# define BOOST_PYTHON_MODULE_INIT(name) \ void init_module_##name(); \ @@ -64,6 +64,6 @@

# endif

-# endif +# endif

#endif // MODULE_INIT_DWA20020722_HPP Index: boost/python/detail/config.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/python/detail/config.hpp,v retrieving revision 1.37 diff -u -r1.37 config.hpp --- boost/python/detail/config.hpp 29 Nov 2004 21:32:14 -0000 1.37 +++ boost/python/detail/config.hpp 23 Aug 2005 21:27:15 -0000 @@ -69,10 +69,10 @@ #if defined(BOOST_PYTHON_DYNAMIC_LIB)

# if !defined(_WIN32) && !defined(__CYGWIN__) \ - && defined(__GNUC__) && __GNUC__ >= 3 && __GNUC_MINOR__ >=5 \ + && defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >=5)) \ && !defined(BOOST_PYTHON_GCC_SYMBOL_VISIBILITY) # define BOOST_PYTHON_USE_GCC_SYMBOL_VISIBILITY -# endif +# endif

# if defined(BOOST_PYTHON_USE_GCC_SYMBOL_VISIBILITY) # if defined(BOOST_PYTHON_SOURCE)

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