AN3350 datasheet(151/185 Pages) STMICROELECTRONICS

151 / 185 page

AN3350

Pragmas for diagnostic messages

Doc ID 018512 Rev 2

151/185

19.26

warn_no_side_effect

Controls the issuing of warning messages for redundant statements.

Syntax

#pragma warn_no_side_effect on | off | reset

Remarks

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

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

statement with (void).Example 99 provides an example.

Example 99 Example of Pragma warn_no_side_effect

#pragma warn_no_side_effect on

void func(int a,int b)

{

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

(void)(a+b); /* OK: void cast suppresses warning. */

}

By default, this pragma is off.

19.27

warn_padding

Controls the issuing of warning messages for data structure padding.

Syntax

#pragma warn_padding on | off | reset

Remarks

If you enable this pragma, the compiler warns about any bytes that were implicitly added

after an ANSI C struct member to improve memory alignment. Refer to the appropriate

Targeting manual for more information on how the compiler pads data structures for a

particular processor or operating system.

By default, this setting is off.

19.28

warn_pch_portability

Controls whether or not to issue a warning message when #pragma once on is used in a

precompiled header.

Syntax

#pragma warn_pch_portability on | off | reset

Remarks

If you enable this pragma, the compiler issues a warning message when you use #pragma

once on

in a precompiled header. This helps you avoid situations in which transferring a

AN3350 데이터시트(PDF) 151 Page - STMicroelectronics

AN3350 데이터시트(HTML) 151 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

데이터시트 다운로드

링크 URL