[libcxx-commits] [libcxx] [RFC][libc++] Install modules. (PR #75741)

[Louis Dionne via libcxx-commits]

================
@@ -81,6 +81,15 @@ Improvements and New Features
 - The ``_LIBCPP_ENABLE_CXX26_REMOVED_STRING_RESERVE`` macro has been added to make
   the function ``std::basic_string<...>::reserve()`` available.
 
+- The experimental standard library module module interface unit source files
+  can now be installed. By default, they are not installed. This can be enabled
+  by configuring CMake with
+  ``-DLIBCXX_INSTALL_MODULE_INTERFACE_UNIT_SOURCES=ON``. The installation
+  directory can be configured with the CMake option
+  ``-DLIBCXX_INSTALL_MODULE_INTERFACE_UNIT_SOURCE_DIR=<path>``. The default
+  location is ``share/libc++/v1`` in the same prefix as the ``include``
+  directory.
----------------
ldionne wrote:

```suggestion
  location is ``${PREFIX}/share/libc++/v1``.
```

https://github.com/llvm/llvm-project/pull/75741