Hello. I am relatively new to boost. I am trying to compile boost-1.52 in a windows server 2008R2 using visual studio 2012 express. I got an error linking random dll: random_device.obj : error LNK2019: unresolved external symbol __imp__CryptAcquireContextA@20 referenced in function "public: __thiscall boost::random::random_device::impl::impl(class std::basic_string const &)" (??0impl@random_device@random@boost@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) The same error repeats for 'CryptReleaseContext', 'CryptGenRandom' and 'CryptEnumProvidersA'. The problem does not happend if I add '<toolset>msvc:<linkflags>advapi32.lib' to the requirements in random/build/Jamfile.v2. Anyone has seen this before? -- Juan Carlos Franzoy Licenciado en Sistemas