Build system modernization #60

Job	Run time
build-autoconf-windows	15m 0s
build-cmake-unix (ubuntu-latest, ON)	18m 1s
build-cmake-unix (macos-latest, OFF)	8m 45s
build-cmake-windows (static, OFF, ON)	21m 14s
build-autoconf (macos-latest)	3m 27s
build-cmake-windows (shared, ON, OFF)	21m 54s
build-autoconf (ubuntu-latest)	8m 31s
	1h 36m 52s

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