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2cf2f1b2b6
This patch makes a few adjustments to the way we run the tests in the Apple configuration on macOS: First, we stop using DYLD_LIBRARY_PATH. Using that environment variable leads to libc++.dylib being replaced by the just-built one for the whole process, and that assumes compatibility between the system-provided dylib and the just-built one. Unfortunately, that is not the case anymore due to typed allocation, which is only available in the system one. Instead, we want to layer the just-built libc++ on top of the system-provided one, which seems to be what happens when we set a rpath instead. Second, add a missing XFAIL for a std::print test that didn't work as expected when building with availability annotations enabled. When we enable these annotations, std::print falls back to a non-unicode and non-terminal output, which breaks the test.
libc++ / libc++abi configuration caches
This directory contains CMake caches for the supported configurations of libc++. Some of the configurations are specific to a vendor, others are generic and not tied to any vendor.
While we won't explicitly work to break configurations not listed here, any configuration not listed here is not explicitly supported. If you use or ship libc++ under a configuration not listed here, you should work with the libc++ maintainers to make it into a supported configuration and add it here.
Similarly, adding any new configuration that's not already covered must be discussed with the libc++ maintainers as it entails a maintenance burden.