3.6.3 Options for Controlling the C Dialect

The options tabulated below define the type of C dialect used by the compiler and are discussed in the sections that follow.

Table 3-9. C Dialect Control Options
Option (links to explanatory section)	Controls
`-ansi`	Strict ANSI conformance.
`-aux-info filename`	The generation of function prototypes.
`-f[no-]common`	The placement of global variables defined without an initializer
`-f[no-]asm`	Keyword recognition.
`-f[no-]builtin` `-fno-builtin-function`	Use of built-in functions.
`-f[no-]signed-char` `-f[no-]unsigned-char`	The signedness of a plain `char` type.
`-f[no-]signed-bitfields` `-f[no-]unsigned-bitfields`	The signedness of a plain `int` bit-field.
`-mext=extension`	Which language extensions is in effect.
`-std=standard`	The C language standard.