Extracting Boost Python does not copy an obscurely included header

Hi,

I'm not sure if this is a bug or not, as it's quite obscure.

Example using Boost 1.79.0: https://gist.github.com/foundry-markf/89e0d9893ecf6614821e4d55188be158

In short, extracting and building Boost Python using bcp, results in an error failing to find a header:

In file included from libs/python/src/object/inheritance.cpp:7:
In file included from ./boost/graph/breadth_first_search.hpp:26:
./boost/graph/two_bit_color_map.hpp:106:10: fatal error: 'boost/graph/detail/empty_header.hpp' file not found
#include BOOST_GRAPH_MPI_INCLUDE(<boost/graph/distributed/two_bit_color_map.hpp>)
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./boost/graph/detail/mpi_include.hpp:13:36: note: expanded from macro 'BOOST_GRAPH_MPI_INCLUDE'
#define BOOST_GRAPH_MPI_INCLUDE(x) <boost/graph/detail/empty_header.hpp>
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

This header is rather obscurely included, from its definition

#if defined BOOST_GRAPH_USE_MPI
#define BOOST_GRAPH_MPI_INCLUDE(x) x
#else
#define BOOST_GRAPH_MPI_INCLUDE(x) <boost/graph/detail/empty_header.hpp>
#endif

and use

#include BOOST_GRAPH_MPI_INCLUDE(< boost / graph / distributed / two_bit_color_map.hpp >)

so I'm not surprised at the error.

The question here is should bcp cope with this?

I've included in the gist, a workaround, by specifying the missing header on the module list, so this is not a blocker for me.

Thanks.

boostorg / bcp

Extracting Boost Python does not copy an obscurely included header #13