[kupiakos]

It's being used correctly: something that is conspicuously old-fashioned for its environment is an anachronism. A toolchain that only supports native builds fits.

[Retr0id]

The article does not place any given toolchain within an incorrect environment, though.

If someone said "old compilers were usually cross-compilers", that would be an ahistoric statement (somewhat).

If someone used clang in a movie set in the 90s, that would be anachronistic.