For compiling codes required for macro support, we now need swiftc
compiler in the build machine.
Unlike Darwin OSes, where swiftCore runtime is guaranteed to be present
in /usr/lib, Linux doesn't have ABI stability and the stdlib of the
build machine is not at the specific location. So the built compiler
cannot relies on the shared object in the toolchain.
As of CMake 3.25, there are now global variables `LINUX=1`, `ANDROID=1`,
etc. These conflict with expressions that used these names as unquoted
strings in positions where CMake accepts 'variable|string', for example:
- `if(sdk STREQUAL LINUX)` would fail, because `LINUX` is now defined and
expands to 1, where it would previously coerce to a string.
- `if(${sdk} STREQUAL "LINUX")` would fail if `sdk=LINUX`, because the
left-hand side expands twice.
In this patch, I looked for a number of patterns to fix up, sometimes a
little defensively:
- Quoted right-hand side of `STREQUAL` where I was confident it was
intended to be a string literal.
- Removed manual variable expansion on left-hand side of `STREQUAL`,
`MATCHES` and `IN_LIST` where I was confident it was unintended.
Fixes#65028.
Rather than bodging the test to make it more robust, fix the functions
in the Threading layer to behave the same as they do on other platforms,
i.e. to guarantee that they always wait *at least* the amount of time
you asked for.
rdar://100236038
Windows' behaviour wrt `Sleep` family functions can be odd. Apparently,
if you specify a time lower than a system tick, they can return early.
This makes the test flaky when it shouldn't be. To fix it, we use the
Multimedia functions to adjust the system tick count as low as we can
get it.
rdar://100236038
The threading unit tests currently just check the operation of Mutex.
This used to be part of the runtime tests, but now it's a separate
library we can test it separately.
rdar://90776105
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
The threading unit tests currently just check the operation of Mutex.
This used to be part of the runtime tests, but now it's a separate
library we can test it separately.
rdar://90776105
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
