The availability flags keep increasing the number of characters on the
command line overflowing the maximum character length on Windows and
making the commands harder to read. This patch moves the generated
arguments into a separate response file so that they can continue to
grow without running into argument length limitations.
These need to be defined always; we'll set them to "unknown" and "none"
respectively if they end up being something we don't understand.
rdar://150966361
Add catalyst support for SwiftStdlibCurrentOS.
Also, set a minimum deployment target when building Concurrency;
this stops the build failing when we're trying to build on older
systems where Concurrency didn't really exist yet.
rdar://150966361
If you use SwiftStdlibCurrentOS availability, you will be able to
use new types and functions from within the implementation. This
works by, when appropriate, building with the CurrentOS availability
set to the current deployment target.
rdar://150944675
Moving the rest of the references to the compiler source directory to
use the `SwiftCore_SWIFTC_SOURCE_DIR` variable instead of
`${PROJECT_SOURCE_DIR}/../../`.
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.
