This doesn't change the point the top-level comment was making. Even if some N lines of C spit out some M lines of different C (hopefully with N < M), the actual code written by the programmers is the code that should be counted, not the generated code.
In the case you describe, the language used to generate the code is C, but the concept doesnt change. This is where you are being disingenuous by means of pointless pedantry.
most of the time line counts are just .c and .h in the file tree, and the generated files to often end up in the file tree and repository.
I'm merely speaking from my own extensive experience in dealing with large C code bases. What you are calling disingenuous and pedantic is ignoring where the hand-wavy line count numbers actually come from. The tend to come from code that is actually checked into the repository which, whether you like it or not, can include large amounts of auto-generated code.
In the case you describe, the language used to generate the code is C, but the concept doesnt change. This is where you are being disingenuous by means of pointless pedantry.