[llvm-dev] Ninja hangs when I try to build

[Adrian McCarthy via llvm-dev]

The program database manager is a separate process VS uses to compile debug
info into a PDB.  The error happens when it's trying to update a PDB that
was created (or last modified) by a newer version of the PDB manager.

https://docs.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/fatal-error-c1902?view=msvc-160

I suspect you have more than one version of VS installed.

I would close all instances of Visual Studio, check your environment to
ensure that your build is set up to use the specific version you're
expecting, and make sure there are no lingering processes
running mspdbsrv.exe, and then try again.  If the problem recurs after
that, I'd repeat but also delete the PDB files in question and force the
compiler to rebuild them from scratch.

On Tue, Dec 8, 2020 at 10:13 AM Paul C. Anagnostopoulos via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> I tried my first build after switching to origin main. I did the switch by
> renaming my master branch and then pointing it at origin main.
>
> I just tried to build llvm-tblgen. It fails building
> RandomNumberGenerator.cpp.obj with "C1902: Program database manager
> mismatch; please check your installation" Then it hangs; Ctrl+C does
> nothing.
>
> I killed the window and started it up again. This time I tried a full
> build. It hangs building DebugCounter.cpp.obj.
>
> I'm running Visual Studio 2019 on Windows 7. Has anyone else seen this?
>
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