full cmake 2/N: integral classes and AM configuration #939

Job	Run time
Repo • macos-latest: clang++ Release	11m 38s
Repo • ubuntu-20.04: g++-10 Release	26m 51s
Repo • macos-latest: clang++ Debug	12m 3s
Repo • ubuntu-20.04: g++-10 Debug	22m 4s
Export • ubuntu-gnu	13m 12s
Export • windows-clang-cl	17m 27s
Export • macos-clang	15m 42s
Export • ubuntu-intel	17m 39s
	2h 16m 36s

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