-xtransition

Issues warnings for the differences between K&R C and Sun ANSI/ISO C. The following warnings no longer appear unless the -xtransition option is used:

                    \a is ANSI C "alert" character

                    \x is ANSI C hex escape

                    bad octal digit

                    base type is really type tag: name

                    comment is replaced by "##"

                    comment does not concatenate tokens

                    declaration introduces new type in ANSI C: type tag

                    macro replacement within a character constant

                    macro replacement within a string literal

                    no macro replacement within a character constant

                    no macro replacement within a string literal

                    operand treated as unsigned

                    trigraph sequence replaced

                    ANSI C treats constant as unsigned: operator

                    semantics of operator change in ANSI C; use explicit cast