[kea-dev] configure: error: Linking with -lboost_system is not enough: please make sure libboost_system is installed

[Francis Dupont]

> Okay, I had saw new docs earlier and was confused:
> 
>           When header-only Boost error code is not available or wanted, the
>           Boost system library is required too.
> 
> What does "wanted" mean here?

=> you don't want to use the heaer-only version, for instance because
it doesn't work well, e.g., Fedora 22.

> As an example with a 1.54.0 install of boost headers, the configure 
> fails with:

=> it should not fail but unfortunately it is not possible to catch
all failure cases.

> In file included from conftest.cpp:41:
> /udir/jreed/pkg/include/boost/system/error_code.hpp:516:54: 
> boost/../libs/system/src/error_code.cpp: No such file or directory

=> this is the standard way for the header-only error code to fail
(it happens on all old versions of boost).

> How to get this header-only Boost error code support?

=> recent enough boost version.

> What version of boost provides it with headers-only?

=> this info is in the 4009 ticket. I believe it is >= 1.56.0.

> (How can we improve this documentation?)

=> find all supported systems where configure can't get working parameters
and update the per-system wiki pages. Note the most frequent case is
the libboost_system not installed and after it is the library is installed
on a not standard location.

Regards

Francis Dupont <fdupont at isc.org>