_Bool and pc_lint

trying to use pc-lint with MISRA 2012 I have tried to change in stdbool

    #define bool _Bool
//typedef _Bool bool;

makes no difference

any suggestions?

I get the below type of 'report' all over the place.

bool bIsFahrenheit = false;
^
..\Src\statemachine.c(34,0): Note 970: Use of modifier or type '_Bool' outside of a typedef [MISRA 2012 Directive 4.6, advisory]

                   ^
..\Src\statemachine.c(34,0): Note 9075: external symbol 'bIsFahrenheit' defined without a prior declaration [MISRA 2012 Rule 8.4, required]

#... ve -e921 */(_Bool) 0/*lint -restore */
                     ^
..\Src\statemachine.c(34,0): Note 970: Use of modifier or type '_Bool' outside of a typedef [MISRA 2012 Directive 4.6, advisory]