[issue39961] warning: this use of "defined" may not be portable (Mac OS)

[Clem Wang]

Clem Wang <clem at clem.com> added the comment:

Oops: forgot version numbers....

MacOS Catalina (10.15.13 19D76)
2.6 Ghz 6-Code Intel i7
32 GB RAM

Homebrew 2.2.10
Homebrew/homebrew-core (git revision 58c0; last commit 2020-03-13)
Homebrew/homebrew-cask (git revision ab52c7; last commit 2020-03-14)

Not sure which compiler is being used, but I have these installed:

gcc --version
gcc (MacPorts gcc9 9.2.0_1) 9.2.0

(3.8-env) C02ZD5VVLVDQ:3.8-env clem.wang$ clang --version
clang version 9.0.0 (tags/RELEASE_900/final)
Target: x86_64-apple-darwin19.3.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin

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<https://bugs.python.org/issue39961>
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