Build and link to Cloud-J in MUSICA Fortran Library

[lizziel]

I am seeking guidance on modifying the build of MUSICA Fortran Library to build and link to Cloud-J photolysis.

Acceptance Criteria
Build and link to Cloud-J library when building MUSICA Fortran Library

Ideas
Cloud-J repo will require work to not require unlimited stack frame size, as documented in geoschem/Cloud-J#20.

[K20shores]

One weird thing we do is to link TUVx directly with our non fortran target. I forget why, honestly, but I know it was necessary.

However, all of our libraries are compiled into a single static or shared library. To do this, all of our downstream projects define an object library which contains all of their sources. This allows us to directly compile the sources so we end up with a single file. Sadly, cmake doesn't offer any other way (that I'm aware of) to combine multiple libraries into one.

musica/src/CMakeLists.txt

Lines 76 to 100 in e1d6f9d

	####################
	# TUVX
	if(MUSICA_ENABLE_TUVX)
	enable_language(Fortran)
	# include the sources directly into musica
	target_sources(musica
	PRIVATE
	$<TARGET_OBJECTS:tuvx_object>
	)
	# but grab the include directories needed for tuvx
	target_link_libraries(musica
	PUBLIC
	tuvx_object
	)
	target_include_directories(tuvx
	PUBLIC
	$<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>
	$<INSTALL_INTERFACE:${MUSICA_INSTALL_INCLUDE_DIR}>
	)
	add_subdirectory(tuvx)
	endif()

We only did this to have a single musica.a library, but it isn't necessary. All you have to do is ensure that musica publicly links to cloud-j and then add it as an install target alongside musica in our packaging instructions.