linux

Refactor option getting v2 #16932

Job	Run time
Arch Linux	20m 22s
CUDA (on Arch)	7m 15s
Arch / PyPy	19m 45s
Fedora	17m 51s
Gentoo	22m 14s
OpenSUSE	16m 39s
Ubuntu Rolling (gcc, g++)	20m 7s
Ubuntu Bionic	14m 56s
Ubuntu Rolling (--unity=on -Ddefault_library=static, --no-unittests, gcc, g++)	13m 36s
Ubuntu Rolling (-Ddefault_library=both, --no-unittests, gcc, g++)	14m 13s
Ubuntu Rolling (clang, clang++)	21m 45s
Ubuntu Rolling (--unity=on, --no-unittests, clang, clang++)	15m 10s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, 0, gcc, g++)	14m 9s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, --unity=on, gcc, g++)	13m 43s
	3h 51m 45s

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