Motorola DSP56800 Guia do Utilizador descarregar pdf (Página 426)

100

101

Pragmas for the DSP56800 and DSP56800E

Pragma Reference

426

Targeting MC56F83xx/DSP5685x Controllers

warn_no_side_effect

Controls the issuing of warnings for redundant statements.

Prototype

#pragma warn_no_side_effect on | off | reset

Remarks

If you enable this pragma, the compiler issues a warning when it encounters a

statement that produces no side effect. To suppress this warning, cast the statement

with (void). Listing C.28

provides an example.

Listing C.28 Example of Pragma warn_no_side_effect

#pragma warn_no_side_effect on

void foo(int a,int b)

{

a+b; // WARNING: expression has no side effect

(void)(a+b); // void cast suppresses warning

}

This pragma does not correspond to any panel setting in the C/C++ Preprocessor

panel. To check this setting, use __option (warn_no_side_effect),

described in Checking Settings

. By default, this pragma is disabled.

warn_notinlined

Controls the issuing of warnings for functions the compiler cannot inline.

Prototype

#pragma warn_notinlined on | off | reset

Remarks

The compiler issues a warning for non-inlined inline function calls.

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