3a0f88c4c2
Some clients use libc++ with modules and LSV (Local Submodule Visibility) enabled, and we see frequent downstream breakage caused by that. Until modules use LSV by default (which is apparently a desire), add a CI job that tests this sub-configuration to avoid high cost downstream breakage. For more information about LSV, see https://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20150504/128395.html. Differential Revision: https://reviews.llvm.org/D143273
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.