I don't think it would be the worst thing for these tools to require Unicode without any normalization. You have to be able to fopen, and that means an exact match. I don't know the state of the world for Windows for utf-8 vs ucs2. Can we reliably get the file open?

I think the TR can place more requirements than the IS can on file names.

On Tue, Feb 26, 2019, 04:50 Manuel Klimek <klimek@google.com> wrote:

On Tue, Feb 26, 2019 at 4:01 AM Ben Boeckel <ben.boeckel@kitware.com> wrote:
On Mon, Feb 25, 2019 at 09:52:34 +0100, Manuel Klimek wrote:
> In the compilation database (
> https://clang.llvm.org/docs/JSONCompilationDatabase.html) we specify the
> build dir for each file.

But that is (generally) output from the build system, not the compiler.
The build system knows because…well, it does. The compiler is just
invoked in a working directory and given no indication of where a "root"
directory is (and I think it might be silly to pass it on the command
line just to have it in this file, but maybe not).

Can't the compiler put in the current work directory it's been called with? That's what I'd expect.
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