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

[Louis Dionne via libcxx-commits]

================
@@ -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.
----------------
ldionne wrote:

```suggestion
  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.
```

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