Installs the source files of the experimental libc++ modules. These
source files (.cppm) are used by the Clang to build the std and
std.compat modules.
The design of this patch is based on a discussing in SG-15 on
12.12.2023. (SG-15 is the ISO C++ Tooling study group):
- The modules are installed at a location, that is not known to build
systems and compilers.
- Next to the library there will be a module manifest json file.
This json file contains the information to build the module from the
libraries sources. This information includes the location where the
sources are installed. @ruoso supplied the specification of this json
file.
- If possible, the compiler has an option to give the location of the
module manifest file
(https://github.com/llvm/llvm-project/pull/76451).
Currently there is no build system support, but it expected to be added
in the future.
Fixes: https://github.com/llvm/llvm-project/issues/73089
8b47bb657b