id summary reporter owner description type status milestone component version severity resolution keywords cc 13171 Linker error when using boost::process::posix::use_vfork Ton van den Heuvel "Trying to build the following code using GCC 7.1.1 and Boost 1.64.0 fails: {{{ #include namespace bp = boost::process; int main(void) { bp::child c(""ls"", bp::posix::use_vfork); c.wait(); return 0; } }}} The following linker error is generated: {{{ In function 'boost::process::detail::posix::executor >, boost::fusion::filter_view&, boost::process::detail::posix::use_vfork_ const&> const, boost::process::detail::is_initializer > > > >::operator()()': spawn_simple.cpp:(.text._ZN5boost7process6detail5posix8executorINS_6fusion10joint_viewINS4_5tupleIJNS2_12exe_cmd_initIcEEEEENS4_11filter_viewIKNS6_IJRA6_KcRNS2_8null_outILi1ELin1EEERKNS2_10use_vfork_EEEENS1_14is_initializerIN4mpl_3argILin1EEEEEEEEEEclEv[_ZN5boost7process6detail5posix8executorINS_6fusion10joint_viewINS4_5tupleIJNS2_12exe_cmd_initIcEEEEENS4_11filter_viewIKNS6_IJRA6_KcRNS2_8null_outILi1ELin1EEERKNS2_10use_vfork_EEEENS1_14is_initializerIN4mpl_3argILin1EEEEEEEEEEclEv]+0x31): undefined reference to `boost::process::detail::posix::executor >, boost::fusion::filter_view&, boost::process::detail::posix::use_vfork_ const&> const, boost::process::detail::is_initializer > > > >::invoke(mpl_::bool_, mpl_::bool_)' }}} Given that Boost Process is a header-only library, why is the linker complaining about unresolved symbols in {{{boost::process::...::invoke()}}}?" Bugs new To Be Determined process Boost 1.64.0 Problem