scope:

This Technical Report specifies a series of extensions of the programming language C, specified by International Standard ISO/IEC 9899:1999. These extensions can be useful in the mitigation of security vulnerabilities in programs, and consist of a new predefined macro, and new functions, macros, and types declared or defined in existing standard headers. International Standard ISO/IEC 9899:1999 provides important context and specification for this Technical Report. Clauses 3 and 4 of this Technical Report are to be read as if they were merged into Clauses 3 and 4 of ISO/IEC 9899:1999. Clause 5 of this Technical Report is to be read as if it were merged into Subclause 6.10.8 of ISO/IEC 9899:1999. Clause 6 of this Technical Report is to be read as if it were merged into the parallel structure of named Subclauses of Clause 7 of ISO/IEC 9899:1999. Statements made in ISO/IEC 9899:1999, whether about the language or library, apply to this Technical Report unless a corresponding section of this Technical Report states otherwise. In particular, Subclause 7.1.4 ("Use of library functions") of ISO/IEC 9899:1999 applies to this Technical Report.