[libc++][test] Make the feature-test macro tests more portable#74185

Merged

StephanTLavavej merged 1 commit intollvm:mainfrom

StephanTLavavej:stl-14-feature-test

Dec 3, 2023

Commits on Dec 2, 2023

Make the feature-test macro tests more portable.
StephanTLavavej
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