The main goal for now is to have this building, with little
concern about matching the build flags used currently.
Keep it disabled by default on Apple platforms.
Addresses rdar://143151393
This patch causes the convenient flow to automatically populate the
sources into the new runtime directory layout. This is run at build-time
so that it repopulates on each build. Since the resync script uses
`COPY_IF_DIFFERENT`, only files that change in the main source directory
are copied over, so incremental builds should still work.
Fixed a small bug in the resync script to ensure that it creates the
subdirectories in the right places.
This patch hooks up the swiftCore library build and gets it installing.
This means that we have library evolution hooked up and vector types.
Building it dynamically found that we had duplicate symbols, so fixed
the swiftDemanglingCR library.
Needed to hook up the availability macros.
The flag configuration is for macOS, so we'll need to go through and
figure out what it should look like for the other platforms too.
Adding stdlib stubs library, which uses gyb and requires knowing about
some of the platform info.
The stubs library pulls in several headers from the compiler repository.
We should probably clean that up, but not right now. I've made a note of
it.
