Choose AR args by program name instead of target

[andylizi]

Right now cc will always use -out:.. -nologo ... for ar args on MSVC targets, regardless of what the archiver actually is. This makes it impossible to use something other than lib.exe.

My use case is the same as #644 — I'm not sure how they managed without this, actually 😅.

[dot-asm]

I'm not sure how they managed without this

By setting AR environment variable to llvm-lib, a lib- and llvm-compatible librarian. Arguably it's a more natural choice and if anything, it would be more appropriate to advocate for having cc-rs use it, llvm-lib, automatically.

[andylizi]

By setting AR environment variable to llvm-lib

llvm-lib is a thing?!

Wow 😂 I remember searching around for keywords like "llvm-ar msvc" and "llvm-ar lib", but somehow failed to find any mention of it. Today I learned...

it would be more appropriate to advocate for having cc-rs use it, llvm-lib, automatically.

Yeah that's for sure. In the mean time, do you think I should change this PR to .ends_with("lib.exe") to cover for llvm-lib usage, or just close it and wait for #657?

[dot-asm]

In the mean time, do you think

I'm just another cc-rs user, I can't tell you what to do :-) Yes, #657 can be extended to use llvm-lib, yes, I can do that... A little bit later...

[dot-asm]

#657 can be extended to use llvm-lib, yes, I can do that...

Done.