We are using for teaching purposes the GPC compiler under Linux (RedHat 6.1) which was installed from the following RPM packages: gpc-19990118-1.i386.rpm gpc-extras-19990118-1.i386.rpm Our Pascal programs are compiled with the "--borland-pascal" option. I noticed a problem with the type "String" (and the derived types like "String[10]") and the relational operators which do not seem to return correct results. The following test program seems illustrate this point: ---------------------------------------------------------------------- program test; procedure Compare(var x,y : String); begin if x=y then Writeln('"',x,'" = "',y,'"') else if x>y then Writeln('"',x,'" > "',y,'"') else if x<y then Writeln('"',x,'" < "',y,'"') else Writeln('"',x,'" ? "',y,'"') end; { Compare } var a,b : String; Empty,Zeros : String; begin a := 'abcd'; b := 'abce'; Empty := ''; Zeros := '0000'; Compare(Zeros,Zeros); Compare(Zeros,a); Compare(a,Zeros); Compare(Empty,Empty); Compare(Empty,a); Compare(a,Empty); Compare(a,a); Compare(a,b) end. ---------------------------------------------------------------------- The following output was produced: "0000" = "0000" "0000" > "abcd" [*] "abcd" ? "0000" [*] "" = "" "" > "abcd" [*] "abcd" ? "" [*] "abcd" = "abcd" "abcd" > "abce" [*] which shows that some results are wrong (marked with [*]). Any suggestions as to what might be wrong? -- Tomasz Kowaltowski