- Error
- 소스 파일 번역시에 문법 상의 오류인 때에 출력. 에러가 있는 경우에는 링킹을 한다거나 실행할 수 없다.
- Warning
- 번역 또는 링킹시에 발생. 경미한 오류인 경우에 출력. 경고를 무시해도 실행파일이 생성된다.
GCC supports three versions of the C standard, although support for the most recent version is not yet complete. The original ANSI C standard (X3.159-1989) was ratified in 1989 and published in 1990. This standard was ratified as an ISO standard (ISO/IEC 9899:1990) later in 1990. There were no technical differences between these publications, although the sections of the ANSI standard were renumbered and became clauses in the ISO standard. This standard, in both its forms, is commonly known as C89 , or occasionally as C90 , from the dates of ratification. The ANSI standard, but not the ISO standard, also came with a Rationale document. To select this standard in GCC, use one of the options -ansi , -std=c90 or -std=iso9899:1990 ; to obtain all the diagnostics required by the standard, you should also specify -pedantic (or -pedantic-errors if you want them to be errors rather than warnings). See Options Controlling C Dialect . Errors in the 1990 ISO C standard were cor
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