Predefined Names

The following identifier is predefined as an object-like macro:

Table 3-4 Predefined Identifier

Identifier	Description
__STDC__	__STDC__ 1 -Xc  __STDC__ 0 -Xa, -Xt  Not defined -Xs

The compiler will issue a warning if __STDC__ is undefined (#undef __STDC__). __STDC__ is not defined in -Xs mode.

Predefinitions (not valid in -Xc mode):

• sun

• unix

• sparc (SPARC)

• i386 (Intel)

The following predefinitions are valid in all modes:

• _ _sun

• _ _unix

• _ _SUNPRO_C=0x500

• _ _`uname -s`_`uname -r` (example: _ _SunOS_5_7)

• _ _sparc (SPARC)

• _ _i386 (Intel)

• _ _BUILTIN_VA_ARG_INCR

• _ _SVR4

• _ _sparcv9 (-Xarch=v9, v9a )

The compiler also predefines the object-like macro _ _PRAGMA_REDEFINE_EXTNAME

to indicate that the pragma will be recognized.

The following is predefined in -Xa and -Xt modes only:

_ _RESTRICT