linux

Introduce user-defined wrapdb source #17141

Job	Run time
Arch Linux	19m 39s
Arch / PyPy	19m 50s
CUDA (on Arch)	7m 8s
Fedora	17m 27s
Gentoo	21m 51s
OpenSUSE	16m 25s
Ubuntu Rolling (gcc, g++)	19m 54s
Ubuntu Bionic	15m 2s
Ubuntu Rolling (--unity=on -Ddefault_library=static, --no-unittests, gcc, g++)	13m 26s
Ubuntu Rolling (-Ddefault_library=both, --no-unittests, gcc, g++)	14m 46s
Ubuntu Rolling (clang, clang++)	22m 9s
Ubuntu Rolling (--unity=on, --no-unittests, clang, clang++)	15m 45s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, 0, gcc, g++)	13m 50s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, --unity=on, gcc, g++)	13m 44s
	3h 50m 56s

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