linux

Refactor option getting v2 #16945

Job	Run time
Arch Linux	20m 9s
Arch / PyPy	21m 21s
CUDA (on Arch)	7m 49s
Ubuntu Rolling (gcc, g++)	20m 12s
Fedora	21m 46s
Ubuntu Rolling (--unity=on -Ddefault_library=static, --no-unittests, gcc, g++)	13m 59s
Gentoo	22m 15s
Ubuntu Rolling (-Ddefault_library=both, --no-unittests, gcc, g++)	14m 34s
OpenSUSE	16m 53s
Ubuntu Rolling (clang, clang++)	22m 39s
Ubuntu Bionic	15m 9s
Ubuntu Rolling (--unity=on, --no-unittests, clang, clang++)	16m 23s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, 0, gcc, g++)	14m 21s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, --unity=on, gcc, g++)	14m 58s
	4h 2m 28s

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