allow the use of asgard as a library

[mkstoyanov]

Major change in the build system and the potential usage:

• ASGarD can not be build and installed as a stand-alone library

  • does not work with custom build BLAS and HDF5, must use external installations
  • requires the -DCMAKE_INSTALL_PREFIX else it defaults to /usr/local and that's not desirable

• the installation can be tested with make test_install

• an ASGarD installation can be included in separate project

• the users have the ability to create a new PDE that exists outside of the main library

• for both cases, see the examples and specifically those in <CMAKE_INSTALL_PREFIX>/share/asgard/exmaples

PS: The install prefix defaults to <build-folder>/asgard_install/ to avoid issues with the system files in /usr/local

[mkstoyanov]

@quantumsteve We should add -DASGARD_BUILD_HDF5=ON to the failing build. I don't want ASGarD to build large third party projects unless the user explicitly asks for that.

I also want to figure out how to "install" the build HDF5 (and OpenBLAS) but that will take a while as I have to test build those a few times. I want to keep the project rolling, so if it takes too long, I will add the HDF5 install in another PR.

PS: The code can now install both HDF5 and OpenBLAS.

[mkstoyanov]

@stefan-schnake Take a look at the "example" of continuity2d and see if my language is fitting what we want to do.

Also, this may help a lot with your work.

[quantumsteve]

@quantumsteve We should add -DASGARD_BUILD_HDF5=ON to the failing build. I don't want ASGarD to build large third party projects unless the user explicitly asks for that.

buildscript's updated.