Syntax

#error tokens

#warning tokens

#message tokens

Description

#error emits tokens to standard error, and increments the assembler error counter, hereby preventing the program from being successfully assembled. #error is specified in the ANSI C standard.

#warning emits tokens to standard error, and increments the assembler warning counter. #warning is not specified in the ANSI C standard, but is commonly implemented in preprocessors such as the GNU C preprocessor.

#message emits tokens to standard output, and does not affect assembler error or warning counters. #message is not specified in the ANSI C standard.

For all directives, the output will include file name and line number, like normal error and warning messages.

tokens is a sequence of preprocessor tokens. Preprocessor macros are expanded except if appearing inside quoted strings (").

Example

#error "Unsupported part:" __PART_NAME__