On Sat, Nov 21, 2009 at 11:20 AM, Vladimir Prus <vladimir@codesourcery.com> wrote:
Alexander Arhipenko wrote:
Index: libs/filesystem/build/Jamfile.v2 =================================================================== --- libs/filesystem/build/Jamfile.v2 (revision 57802) +++ libs/filesystem/build/Jamfile.v2 (working copy) @@ -11,6 +11,7 @@ project boost/filesystem : source-location ../src : usage-requirements # pass these requirement to dependents (i.e. users) + <library>/boost/system <link>shared:<define>BOOST_FILESYSTEM_DYN_LINK=1 <link>static:<define>BOOST_FILESYSTEM_STATIC_LINK=1 ;
Alexander, do you actually need the above patch? Because boost.filesystem has boost.system in sources, you should not need to add it to usage requirements.
Could you clarify?
I have checked in two other changes in your patch. Thanks!
- Volodya
Hi Volodya, I thinks the filesystem's patch is required and will try to clarify why. Here is minimal example that reproduces the issue: #Jamfile.v2: exe foo : main.cpp /boost/filesystem ; //main.cpp: #include <boost/filesystem.hpp> int main(int argc, char* argv) { return 0; } In this case following error appears: main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (__imp_?get_system_category@system@boost@@YAABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'system_category''(void)" (??__Esystem_category@system@boost@@YAXXZ) The reason is: #include <boost/filesystem.hpp> --> includes <boost/path.hpp> --> includes <boost/system/system_error.hpp> --> includes <boost/system/error_code.hpp> File boost/system/error_code.hpp has following declarations: BOOST_SYSTEM_DECL const error_category & get_system_category(); BOOST_SYSTEM_DECL const error_category & get_generic_category(); So, when the header above is included in main.cpp, BOOST_SYSTEM_DECL unrolls to: __declspec(dllimport). And this causes the linker error. As a result, library that links boost::filesystem should link boost::system. Regards