Various fixes to enable most tests on BSD. #119

Job	Run time
Baseline (ubuntu-20.04, gcc, g++, python3.6)	27s
Baseline (ubuntu-20.04, gcc, g++, python3.7)	36s
avx	10s
Baseline (ubuntu-20.04, gcc, g++, python3)	18s
arm-arm	22s
arm-thumb	23s
Baseline (ubuntu-20.04, clang, clang++, python3.6)	27s
Baseline (ubuntu-20.04, clang, clang++, python3.7)	25s
Coverage	26s
Pylint	16s
Baseline (ubuntu-20.04, clang, clang++, python3)	18s
PyPy	42s
Baseline (ubuntu-22.04, gcc, g++, python3.7)	26s
x86	22s
Baseline (ubuntu-22.04, gcc, g++, python3)	23s
aarch64	25s
Baseline (ubuntu-latest, gcc, g++, python3.7)	45s
armhf-arm	28s
armhf-thumb	42s
Baseline (ubuntu-latest, gcc, g++, python3)	19s
mips64el	32s
mipsel	26s
powerpc64le	26s
riscv64	24s
powerpc64	31s
	10m 59s

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