I know I should be posting a bug on SDCC's tracker with this, but 1. I am lazy, and this Forum is WAY easier to use ;-) 2. I don't know how relevant this might be, given the OS I run here is a venerable W98SE; 3. most of the '51-related SDCC folks are quite regular here (including cmon's author).

When trying to compile cmon on today's flavour of SDCC : 2.9.1 #5464 (May 27 2009) (MINGW32), I got (mainly in cmon51.c)

• a lot of "comparison of 'signed char' with 'unsigned char' requires promotion to int" warnings
  
• "error 10: 'lvalue' required for '=' operation" -- on the following "true-C" statement: ++k&=7;
  (OK this IS naughty, but is this supposed to be an error by C standard?)
  
• "error 78: incompatible types [etc]" - some pointer type mismatch
  
• some other "unimportant" warning
  

I fixed the errors, and then I thought I will fix all the "signed/unsigned char" problems by using the --funsigned-char switch. But when run on cmon51.c with this switch, the "command" window (with "SDCPP" label) froze (and had to be "killed", as "not responding"), with the following message: "Internal error: validateLink failed in SPEC_NOUN((yyvsp[(1) - (2)].lnk)) @ /home/sdcc-builder/build/sdcc-build/orig/sdcc/src/SDCC.y:1297: expected SPECIFIER, got DECLARATOR"

JW