Include SDC GC

[kinke]

No description provided.

[kinke]

Alright, the install package seems fine. The new GC is opt-in via e.g. --DRT-gcopt=gc:sdc:

$ cat hello.d
void main() {
    import std.stdio;
    writeln("Hello world!");
    auto dummyAlloc = new int; // drag in the GC
}
$ dmd hello.d
$ ./hello
Hello world!
$ ./hello --DRT-gcopt=gc:sdc
Hello world!
using SDC GC!

[kinke]

Tagged: https://github.com/symmetryinvestments/dmd-umbrella/releases/tag/v2.110.0-sym3-newgc1