9.9 Compiler-Specific Type Qualifiers

The MPLAB XC-DSC C Compiler supports special type qualifiers, all of which allow the user to control how variables are accessed.
Table 9-7. Qualifier Support by Architecture
Qualifier dsPIC33C/E/F, dsPIC30 dsPIC33A
__psv__ See section 9.9.1 Not supported, silently ignored
__prog__ See section 9.9.2 Not supported, silently ignored
__eds__ See section 9.9,3 Not supported, silently ignored
__pack_upper_byte See section 9.9.4 Not supported, silently ignored
__pmp__ See section 9.9.5 Not supported, ignored with error
__external__ See section 9.9.6 See section 9.9.6