Add Boost.Geometry to dependencies

[jeremy-murphy]

No description provided.

[jeremy-murphy]

@grafikrobot , did I add it correctly?

Or is BGL the first library to depend on Boost.Geometry and test this part of the build system?

[grafikrobot]

@grafikrobot , did I add it correctly?

Yes.

Or is BGL the first library to depend on Boost.Geometry and test this part of the build system?

Don't know.

[jeremy-murphy]

  The link interface of target "boost_geometry" contains:

    Boost::crc

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

OK, so this is a bug in Boost.Geometry?

[jeremy-murphy]

@pdimov do you maintain Boost.CRC? Do you know if this problem is with Geometry or CRC?

[pdimov]

It's not a problem in CRC. It's caused by Geometry listing CRC as a dependency in its CMakeLists.txt here:

https://github.com/boostorg/geometry/blob/8aaf504091cfb46541b0a014cb0778c4d7754b51/CMakeLists.txt#L27

but it doesn't actually depend on CRC.

[jeremy-murphy]

@pdimov thanks for answering. But... why does that cause this error, just because it doesn't actually use it?

[pdimov]

Because only the actual dependencies are installed by depinst, so libs/crc is empty and the target Boost::crc doesn't exist.

[jeremy-murphy]

Thanks for the explanation. PR to fix Boost.Geometry: boostorg/geometry#1437

[jeremy-murphy]

Made redundant by new implementation that doesn't use Boost.Geometry.