1474856 - clang-cl version number is reported as MSVC version it is emulating

Status: NEW

(Firefox Build System :: General, enhancement)

Description

[(not currently active) Ted Mielczarek]

I noticed in about:buildconfig on my new nightly that's built with clang-cl that the compiler version number is reported as "19.13.26128", which is the MSVC version we're instructing it to emulate:
https://dxr.mozilla.org/mozilla-central/rev/085cdfb90903d4985f0de1dc7786522d9fb45596/build/moz.configure/toolchain.configure#522

This is because we use `_MSC_FULL_VER` here:
https://dxr.mozilla.org/mozilla-central/source/build/moz.configure/toolchain.configure#381

I'm not sure if this is important for anything, but it would be nice to have accurate information in about:buildconfig.

Comment 1

[Gregory Szorc [:gps]]

Might as well chain this to the clang-cl tracking bug.