ldc2 does not respect -of on Windows

[p0nce]

Easy to see with a DUB project with one static dependency.
For example: https://github.com/p0nce/scheme-d/tree/master/examples/repl

OS: Win64
Compiler: Version: LDC 0.16.0-alpha3

To reproduce:
$ dub build --build=debug --arch=x86_64 --compiler=ldc2 --force -v

Here this produces the command:

ldc2 -march=x86-64 -lib -of..\..\.dub\build\library-debug-windows-x86_64-ldc_0-9D41B5ED4C8AD317C9307A7BAF5A80A1\libscheme-d.a -d-debug -g -w -oq -od=.dub/obj -d
-version=Have_scheme_d -I..\..\source ..\..\source\schemed\environment.d ..\..\source\schemed\eval.d ..\..\source\schemed\package.d ..\..\source\schemed\parser.d ..\..\source\schemed\types.d

However the file produced is named libscheme-d.a.liband not libscheme-d.a so DUB fails next.

[redstar]

.a is not a file extension which is recognized by the MS tool chain. I argue that this is a dub issue.

[p0nce]

I'm completely OK for fixing this in DUB, but ldc takes a .a as -of parameter and silently renames it to .lib
I think it should instead do what it is told, and let the link fail.

[p0nce]

If DUB pass a .lib path, will another .lib be appended?

[redstar]

Ok, I got it. This is a misunderstanding of dmd behaviour. I'll fix it.

[redstar]

The issue is fixed in master now. For the naming I have created a dub issue: dlang/dub#687