CMake only build option that does not rely on Conan package manager

[kwryankrattiger]

The motivation to this is to allow the XMS mesher to integrate with package management ecosystems that are not Conan. Would this be something you would be willing to merge?

I have done a first pass for this here:
XMS Mesher
XMS Interp
XMS Graph
XMS Core

Some issues that I ran into while doing this:

• C++14 assumptions not handled in Boost.Geometry
  • Fixed by moving Linux builds to C++14
• XMS library naming was inconsistent with library linking (ie. exported as xmscorelib -> linked as xmscore)
  • Fixed my changing project names, this doesn't feel like a desirable approach

[kwryankrattiger]

Note: The branch with these changes is kitware_superbuild

I made another round of updates that I think cleans up selecting building for Conan vs Conda vs CMake. I also added CMake code to export targets and install -config.cmake files to enable find_package for the different XMS packages.

• IS_<XXX>_BUILD is now XMS_BUILD_MODE with selections as CONAN/CONDA/CMAKE.
• IS_PYTHON_BUILD is now ENABLE_PYTHON which is more consistent with the rest of the CMake ecosystem.
• BUILD_SHARED_LIBS is now an option, by default it still builds as static but having a shared library option is nice to have.
• Fixed install directory for python modules to follow standard conventions for installing python interfaces next to project
  • lib/python-/site-packages/xms/

The two issues above are still issues.

[kwryankrattiger]

Note: The branch with these changes is kitware_superbuild

I made another round of updates that I think cleans up selecting building for Conan vs Conda vs CMake. I also added CMake code to export targets and install -config.cmake files to enable find_package for the different XMS packages.

If I have time I may re-work these to install to lib/xms/components and then install a xms-config.cmake that handles configuring the components.

ie.

find_package(XMS COMPONENTS Core Grid Interp Mesher)

add_library(foo PUBLIC XMS::Core ...)

for now the find_package requires an extra NAMES xms field or the CMAKE_PREFIX_PATH to be set.

• IS_<XXX>_BUILD is now XMS_BUILD_MODE with selections as CONAN/CONDA/CMAKE.
• IS_PYTHON_BUILD is now ENABLE_PYTHON which is more consistent with the rest of the CMake ecosystem.
• BUILD_SHARED_LIBS is now an option, by default it still builds as static but having a shared library option is nice to have.

The two issues above are still issues.