Atmel CAVR-4 Manual De Usuario

CAVR-4

Part 2. Compiler reference

This chapter describes how the AVR IAR C/C++ Compiler handles the 

implementation-defined areas of the C language.

ISO 9899:1990, the International Organization for Standardization standard - 

Programming Languages - C (revision and redesign of ANSI X3.159-1989, 

American National Standard), changed by the ISO Amendment 1:1994, 

 and Technical Corrigendum 2, contains an appendix 

called Portability Issues. The ISO appendix lists areas of the C language that ISO 

leaves open to each particular implementation.

Note: The AVR IAR C/C++ Compiler adheres to a freestanding 

implementation of the ISO standard for the C programming language. This 

means that parts of a standard library can be excluded in the implementation.

This section follows the same order as the ISO appendix. Each item covered includes 
references to the ISO chapter and section (in parenthesis) that explains the 
implementation-defined behavior.

Diagnostics are produced in the form:

filename,linenumber level[tag]: message

where 

 is the name of the source file in which the error was encountered, 

 is the line number at which the compiler detected the error, 

 is the 

level of seriousness of the message (remark, warning, error, or fatal error), 

is a 

unique tag that identifies the message, and 

 is an explanatory message, possibly 

several lines.