Texas Instruments TMS320C2x, Руководство пользователя

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Changing the Compiler’s Behavior With Options
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2.3.6 Options That Overlook ANSI C Type Checking
Following are options that you can use to overlook some of the strict ANSI C
type checking on your code:
− tf Overlooks type checking on redeclarations of prototyped func-
tions. In ANSI C, if a function is declared with an old-format decla-
ration and later declared with a prototype (as in the example be-
low), this generates an error because the parameter types in the
prototype disagree with the default argument promotions (which
convert float to double and char to int).
int func( ) /* old format */
int func(float a, char b) /* new format */
− tp Overlooks type checking on pointer combinations. This option has
two effects:
-
A pointer to a signed type can be combined in an operation with
a pointer to the corresponding unsigned type:
int *pi;
unsigned *pu;
pi = pu; /* Illegal unless -tp used */
-
Pointers to differently qualified types can be combined:
char *p;
const char *pc;
p = pc; /* Illegal unless -tp used */
The − tp option is especially useful when you pass pointers to
prototyped functions, because the passed pointer type would ordi-
narily disagree with the declared parameter type in the prototype.