error line numbers affected by #if(n)def

[programandala.net]

I realized the line numbers shown in the error reports don't include the lines discarded by #ifdef and #ifndef. I mean, the lines of the source discarded by #ifdef and #ifndef are not counted.
I guess the compiler discards those parts before doing the next pass, but the annoyng effect is the lines of errors and warnings are not real.
This is a problem, mainly with long programs where conditional compilation is used a lot.