[compiler-rt] [test] Avoid error printouts if os.sysconf is missing

[mstorsjo]

This avoids dozens of instances of benign error messages being printed when running the tests on e.g. Windows:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'os' has no attribute 'sysconf'

[github-actions]

🐧 Linux x64 Test Results

• 5820 tests passed
• 1323 tests skipped

[fmayer]

Wouldn't it be better to just fix the offending script to not use sysconf on Windows?

[mstorsjo]

Wouldn't it be better to just fix the offending script to not use sysconf on Windows?

I guess that could work as well, although the script being inline in the proc.communicate(b'import os; print(os.sysconf("SC_PAGESIZE"))'), so adding conditionals in that makes it a bit more messy (do conditionals work in such indentation-free python?).

[fmayer]

proc.communicate(b'import os; print(os.sysconf("SC_PAGESIZE"))

how about this?

% python -c 'import os; print(os.sysconf("SC_PAGESIZE") if hasattr(os, "sysconf") else "")'
4096

[mstorsjo]

proc.communicate(b'import os; print(os.sysconf("SC_PAGESIZE"))

how about this?

% python -c 'import os; print(os.sysconf("SC_PAGESIZE") if hasattr(os, "sysconf") else "")'
4096

Thanks, that seems to work! I've updated the PR with that.

[github-actions]

✅ With the latest revision this PR passed the Python code formatter.

[fmayer]

LGTM, I like that much better

please fix formatting