[llvm-bugs] [Bug 38966] New: Make lld-link not depend on mt.exe on Windows

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38966

            Bug ID: 38966
           Summary: Make lld-link not depend on mt.exe on Windows
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: COFF
          Assignee: unassignedbugs at nondot.org
          Reporter: nicolasweber at gmx.de
                CC: llvm-bugs at lists.llvm.org

On non-Windows, we use libxml2 and llvm/lib/WindowsManifest/ to merge
manifests.

On Windows, libxml2 usually doesn't exist, so we rely on mt.exe being on PATH.

The way forward is probably to use msxml on Windows instead of libxml2, since
that's always around. I have prototyped this a bit at
https://reviews.llvm.org/D42910 but it's incomplete.


Once this is done, lld-link.exe no longer relies on PATH and the only env var
it relies on is LIB, which can be passed via /libpath:. So once this is done,
no special env needs to be set to be able to run lld-link -- once we have this,
we can stop running lld-link.exe under `ninja -t msvc` in the chrome/win build
on win hosts. (We already don't need it on non-win hosts.)

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