Jupyter kernel handles library loads differently in a single cell vs separate cells

[chrahunt]

• Expected behavior: Libraries may be loaded in a single cell and used later.
• Observed behavior: Dependent libraries need to be loaded in separate cells.
• Cling version: 0.5~dev (nightly) ubuntu16 from 2017-08-30
• OS: Ubuntu 16.04.3

Here is a markdown-formatted reproduction of the Jupyter notebook available here.

First attempt (failure)

Libraries are in correct load order, but seem not to resolve correctly when there are inter-dependencies (boost_filesystem depends on boost_system).

.I /usr/include
.L /usr/lib/x86_64-linux-gnu/libboost_system.so.1.58.0
.L /usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.58.0

Separated into 2 cells per #148.

#include <boost/filesystem.hpp>
#include <iostream>

IncrementalExecutor::executeFunction: symbol '_ZN5boost6system16generic_categoryEv' unresolved while linking function '_GLOBAL__sub_I_cling_module_1'!
You are probably missing the definition of boost::system::generic_category()
Maybe you need to load the corresponding shared library?
IncrementalExecutor::executeFunction: symbol '_ZN5boost6system15system_categoryEv' unresolved while linking function '_GLOBAL__sub_I_cling_module_1'!
You are probably missing the definition of boost::system::system_category()
Maybe you need to load the corresponding shared library?

std::cout << static_cast<unsigned long>(boost::filesystem::file_size("/bin/sh")) << "\n";

IncrementalExecutor::executeFunction: symbol '_ZN5boost10filesystem6detail9file_sizeERKNS0_4pathEPNS_6system10error_codeE' unresolved while linking [cling interface function]!
You are probably missing the definition of boost::filesystem::detail::file_size(boost::filesystem::path const&, boost::system::error_code*)
Maybe you need to load the corresponding shared library?

Second attempt (success)

Restarted kernel then evaluated the cells below, which succeeds

.I /usr/include
.L /usr/lib/x86_64-linux-gnu/libboost_system.so.1.58.0

.L /usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.58.0

#include <boost/filesystem.hpp>
#include <iostream>

std::cout << static_cast<unsigned long>(boost::filesystem::file_size("/bin/sh")) << "\n";

154072





(std::basic_ostream<char, std::char_traits<char> > &) @0x7fa9b1eb3f40