CAN/CSA-ISO/IEC 24747:12

1 Scope 1.1 Relation to C Standard Library Introduction [descr] 1 This International Standard defines extensions to the C standard library that is defined in the International Standard for the C programming language, see Clause 2. 2 Unless otherwise specified, the whole of the C Standard Library is included into this International Standard by reference, see Clause 2. 1.2 Categories of extensions [exten] 1 This International Standard defines library extensions to the C Standard Library to support Mathematical Special functions to be added to <math.h> and <tgmath.h>.