9.2 Extensions to the ANSI C Standard

The MPLAB XC16 C Compiler provides extensions to the ANSI C standard in these areas: keywords and expressions.

Keyword Differences

The new keywords are part of the base GCC implementation and the discussions in the referenced sections are based on the standard GCC documentation, tailored for the specific syntax and semantics of the 16-bit compiler port of GCC.

Specifying Attributes of Variables – Variable Attributes
Specifying Attributes of Functions – Function Specifiers
Inline Functions – Inline Functions
Variables in Specified Registers – Allocation of Variables to Registers

Expression Differences

Expression differences are:

Binary Constants – Literal Constant Types and Formats

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