dolfin team mailing list archive

[Johannes Ring <johannr@xxxxxxxxx>]

On Tue, Sep 27, 2011 at 10:04 AM, Kristian Ølgaard
<k.b.oelgaard@xxxxxxxxx> wrote:
> On 27 September 2011 09:25, Johannes Ring <johannr@xxxxxxxxx> wrote:
>> On Tue, Sep 27, 2011 at 9:19 AM, Garth N. Wells <gnw20@xxxxxxxxx> wrote:
>>> This change will break the buildbots until Boost is updated on the buildbots.
>>
>> Yes, I'm working on this now (two fixed, two to go).
>
> A simple question related to this, to help understanding the
> CMakeLists.txt file better.
>
> I installed libboost-mpi-dev and everything worked fine. This seems a
> bit strange to me since I'm running boost version 1.42.0, but looking
> in the CMakeLists.txt file I see the lines:
>
> set(Boost_ADDITIONAL_VERSIONS 1.43 1.43.0 1.44 1.44.0 1.45 1.45.0 1.46
> 1.46.0 1.46.1)
>
> if (DOLFIN_ENABLE_MPI AND MPI_FOUND)
>  find_package(Boost 1.36 COMPONENTS filesystem program_options system
> thread iostreams mpi REQUIRED)
> else()
>  find_package(Boost 1.36 COMPONENTS filesystem program_options system
> thread iostreams REQUIRED)
> endif()
> find_package(Boost 1.36 COMPONENTS filesystem program_options system
> thread iostreams REQUIRED)
>
> If 1.42 or 1.42.0 was in the list of ADDITIONAL_VERSIONS, or if '1.36'
> was '1.42', I could understand it. But if '1.36' works as a minimum
> requirement, then why bothering setting additional versions?

The 1.36 is the minimum required version for DOLFIN, while the
Boost_ADDITIONAL_VERSIONS variable is used to help CMake find newer
versions of Boost that wasn't available when CMake 2.8.0 was released
(see FindBoost.cmake).

Johannes