I have only AVR qC experiences and no SDCC. Like you I didn't find a doc.
Do you have specific Problems on the compiling process/upload/debugging?
Nice to see that teachers would like to use FOSS in their lessons
Not yet, the last small project/lab of the year has the option of being PIC assembly or C.
I have not yet gotten the information on what the lab is to do.
The class is not teaching C on the PIC till right at the end(Learning Assembly on the C), I hope to do conditions in my C so it complies on both the required compiler and SDCC. It is possible it is the programmer choice of which compiler to use.
Tim S