[clang] [C++20] [Modules] Embed all source files for C++20 Modules (PR #102444)

[Iain Sandoe via cfe-commits]

iains wrote:

FWIW: As [clang, GCC, MSVC] are currently implementing modules, there is no question of compatibility at the exchange of BMIs level (so that is currently a non-issue).  It does not seem that this is something in the "compatible with gcc-4.2.1" layer....

However, it is a tooling issue if one toolchain does not require sources distributed along with the BMIs but others do - so that is a potential reason to want to coordinate.


https://github.com/llvm/llvm-project/pull/102444