The following two programs fail on i386-apple-darwin when using gpc version 20051116 with gcc-3.4.5, but not when using gpc version 20070904 with gcc-4.1.2. This was reported by Stéphane Nicolet on the mac-pascal mailiong list. Does someone remember if this is a back-end or front-end problem ? {$mac-pascal} program modbug; var a,b: integer; c: boolean; begin a := 22; b := 12; c:= ((a - 15) mod b) = (b-1) end. {$borland-pascal} program modbug; var a,b: integer; c: boolean; begin a := 22; b := 12; c:= ((a - 15) mod b) = (b-1) end. Regards, Adriaan van Os