linux-2.6.33/__used の履歴ソース(No.2)

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• 差分 を表示
• 現在との差分 を表示
• 履歴 を表示
• linux-2.6.33/__used へ行く。
  • 1 (2010-11-10 (水) 21:33:50)
  • 2 (2010-11-10 (水) 21:36:40)

*参照元 [#j005f63b]
#backlinks

*説明 [#bddbfc26]
-パス: [[linux-2.6.33/include/linux/compiler.h]]
--gcc3 版: [[linux-2.6.33/include/linux/compiler-gcc3.h]]
--gcc4 版: [[linux-2.6.33/include/linux/compiler-gcc4.h]]

-FIXME: これは何？
--説明


**参考 [#he6e3bae]


*実装 [#l6f7dad2]
** include/linux/compiler.h [#f0f5159c]
 /*
  * Allow us to avoid 'defined but not used' warnings on functions and data,
  * as well as force them to be emitted to the assembly file.
  *
  * As of gcc 3.4, static functions that are not marked with attribute((used))
  * may be elided from the assembly file.  As of gcc 3.4, static data not so
  * marked will not be elided, but this may change in a future gcc version.
  *
  * NOTE: Because distributions shipped with a backported unit-at-a-time
  * compiler in gcc 3.3, we must define __used to be __attribute__((used))
  * for gcc >=3.3 instead of 3.4.
  *
  * In prior versions of gcc, such functions and data would be emitted, but
  * would be warned about except with attribute((unused)).
  *
  * Mark functions that are referenced only in inline assembly as __used so
  * the code is emitted even though it appears to be unreferenced.
  */
 #ifndef __used
 # define __used			/* unimplemented */
 #endif


** include/linux/compiler-gcc3.h [#c4d08228]
 #if __GNUC_MINOR__ >= 3
 # define __used			__attribute__((__used__))
 #else
 # define __used			__attribute__((__unused__))
 #endif


** include/linux/compiler-gcc4.h [#e1250e81]
 #define __used			__attribute__((__used__))


*コメント [#t5e5509c]