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The GNU C Library

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A. C Language Facilities in the Library

Some of the facilities implemented by the C library really should be thought of as parts of the C language itself. These facilities ought to be documented in the C Language Manual, not in the library manual; but since we don't have the language manual yet, and documentation for these features has been written, we are publishing it here.

A.1 Explicitly Checking Internal Consistency  Using assert to abort if something "impossible" happens.
A.2 Variadic Functions  Defining functions with varying numbers of args.
A.3 Null Pointer Constant  The macro NULL.
A.4 Important Data Types  Data types for object sizes.
A.5 Data Type Measurements  Parameters of data type representations.

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