fixing CMakeLists for non-x86 architectures #804

Job	Run time
build_python_27 (ubuntu-20.04, yes)	2m 14s
build_python_27 (ubuntu-20.04, no)	2m 13s
build (3.5, yes, ubuntu-20.04)	2m 11s
mypy	17s
test_c_linux (0, x64)	55s
build_python_27 (windows-latest, yes)	3m 28s
test_c_linux (0, x32)	1m 2s
build (3.5, no, ubuntu-20.04)	2m 0s
build_python_27 (windows-latest, no)	3m 19s
test_c_linux (1, x64)	1m 12s
build (3.6, yes, ubuntu-20.04)	2m 7s
test_c_windows (x64)	47s
test_c_linux (1, x32)	55s
build (3.6, no, ubuntu-20.04)	2m 6s
test_c_windows (win32)	52s
build (3.7, yes, ubuntu-20.04)	2m 8s
build (3.7, no, ubuntu-20.04)	2m 0s
build (3.8, yes, ubuntu-20.04)	1m 54s
build (3.8, no, ubuntu-20.04)	1m 54s
build (3.9, yes, ubuntu-20.04)	1m 57s
build (3.9, no, ubuntu-20.04)	1m 55s
build (3.10, yes, ubuntu-20.04)	1m 55s
build (3.10, no, ubuntu-20.04)	1m 59s
build (3.11, yes, ubuntu-20.04)	1m 35s
build (3.11, no, ubuntu-20.04)	1m 41s
build (3.12-dev, yes, ubuntu-20.04)	1m 43s
build (3.12-dev, no, ubuntu-20.04)	1m 48s
build (3.11, yes, macos-12)	3m 4s
build (3.11, no, windows-latest)	4m 12s
build (3.11, yes, windows-latest)	4m 9s
build (3.12-dev, no, windows-latest)	4m 8s
build (3.12-dev, yes, windows-latest)	3m 32s
build (pypy2.7, no, ubuntu-latest)	1m 24s
build (pypy3.9, no, ubuntu-latest)	1m 28s
	1h 10m 4s

Provide feedback