Vladimir Prus wrote:
Robert Ramey wrote:
a) how do we insure that that if a program uses several libraries each of which in turn uses the common utf8 module, we don't get multiply defined symbols at
The "common" files will be included into a wrapper file (one for each library), with different namespaceses:
namespace boost { namespace program_options { #include "../../libs/detail/utf8/utf8_codecvt.cpp"
wll this work without a problem? The first lines of utf8_codecvt_facet.cpp (my copy) contain: #include <boost/config.hpp> #ifdef BOOST_NO_STD_WSTREAMBUF #error "wide char i/o not supported on this platform" #else #include <cassert> #include <cstddef> #include <boost/utf8_codecvt_facet.hpp> So the above will expand to something like: namespace boost { namespace program_options { // #include "../../libs/detail/utf8/utf8_codecvt.cpp" #include <boost/config.hpp> #ifdef BOOST_NO_STD_WSTREAMBUF #error "wide char i/o not supported on this platform" #else #include <cassert> #include <cstddef> #include <boost/utf8_codecvt_facet.hpp> // } // program_options // } // boost which would but all the lowerlevel includes in the program options namespace as well. Idon't see how that can work. Robet Ramey