[libcxx-commits] [libcxx] [libc++][doc] Add warning about limitation of --fresh in boostrapping build (PR #65265)

[Will Hawkins via libcxx-commits]

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@@ -78,6 +78,9 @@ CMake invocation at ``<monorepo>/llvm``:
   This type of build is also commonly called a "Runtimes build", but we would like to move
   away from that terminology, which is too confusing.
 
+.. warning::
+  Adding the `--fresh` flag to the top-level cmake invocation in a bootstrapping build *will not* freshen the cmake cache of any of the enabled runtimes.
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hawkinsw wrote:

 Absolutely!! Thanks! Fixup coming!

https://github.com/llvm/llvm-project/pull/65265