The Zig LLVM backend emits calls to softfloat methods with the "standard
compiler-rt" names. Rather than add complexity to the backend and
have to synchronize the naming scheme across all targets, the simplest
fix is just to export these symbols under both the "standard" and the
platform-specific naming convention.
Starting with LLVM 14, the Libcalls to these functions are now lowered
using a Vec(2, u64) instead of the standard ABI for i128 integers, so
our compiler-rt implementation needs to be updated to expose the same
ABI on Windows.
The purpose of this branch is to switch to using an object file for each
independent function, in order to make linking simpler - instead of
relying on `-ffunction-sections` and `--gc-sections`, which involves the
linker doing the work of linking everything and then undoing work via
garbage collection, this will allow the linker to only include the
compilation units that are depended on in the first place.
This commit makes progress towards that goal.
