[llvm-dev] Question about the build

[James Henderson via llvm-dev]

For what it's worth, I've recently been running into problems related to
the NATIVE tablegen build for optimized tablegen usage in debug builds. In
my case, it was (and may still be) unnecessarily rebuilding tablegen
related files every time, even though nothing has changed, which in turn
causes the rest of the build to trigger (as Visual Studio sees things as
being out-of-date). I forget the exact details, but can dig them out later
if someone is interested in investigating further. I haven't had the time
to dig into this properly myself, but it is frequently hurting my
productivity.

On Sun, 20 Dec 2020 at 21:32, Paul C. Anagnostopoulos via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Thank you, sir! Indeed, -DLLVM_OPTIMIZED_TABLEGEN=ON was the problem.
> Everything is back to normal with =OFF.
>
> At 12/19/2020 08:48 PM, Reid Kleckner wrote:
> >This seems like a bug in LLVM_OPTIMIZED_TABLEGEN. What you are describing
> works in the standard configuration.
>
>
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