Imagecraft c compiler and development environment for the atmel avr

ICCV8 for AVR – C Compiler for Atmel AVRSupported DirectivesLong definitions can be broken into separate lines by using the line-continuationcharacter backslash at the end of the unfinished line.Macro Definition #define macname definitionA simple macro definition. All references to macname will be replaced by itsdefinition. #define macname(arg [,args]) definitionA function-like macro, allowing arguments to be passed to the macro definition. #undef macnameUndefine macname as a macro. Useful for later on redefining macname to anotherdefinition.C99 allows variable arguments in a function-like macro definition.Conditional ProcessingIn conditional processing directives (#if/#ifdef/#elif/#else/#endif), a linegroup refers to the lines between the directive and the next conditional processingdirective. Conditional directives must be well formed. For example, #else, if it exists,must be the last directive of the chain before the #endif. A sequence of conditionaldirectives form a group, and groups of conditional directives can be nested. defined(name)Can only be used within the #if expression. Evaluate to 1 if name is a macroname and 0 otherwise. #if Conditionally process the line group if evaluates to non-zero. may contain arithmetic/logical operators and defined(name). However, sincethe C preprocessor is separate from the C compiler proper, it cannot contain thesizeof or typecast operators. #ifdef name / #ifndef nameA shorthand for #if defined(name) and #if !defined(name),respectively. #elif 68