Pragma Directives

There are certain compile-time directives that can be used to modify the behavior of the compiler. These are implemented through the use of the C Standard’s #pragma facility. The format of a pragma is:

#pragma directive options

where directive is one of a set of keywords, some of which are followed by options. A list of the keywords is given in the Table 1 table. Those keywords not discussed elsewhere are detailed below.

Table 1. Pragma Directives
Directive	Meaning	Example
`addrqual`	Specify action of qualifiers.	`#pragma addrqual require`
`config`	Specify configuration bits.	`#pragma config WDT=ON`
`inline`	Inline function if possible.	`#pragma inline(getPort)`
`intrinsic`	Specify function is inline.	`#pragma intrinsic(_delay)`
`interrupt_level`	Allow call from interrupt and main-line code.	`#pragma interrupt_level 1`
`pack`	Specify structure packing.	`#pragma pack 1`
`printf_check`	Enable printf-style format string checking.	`#pragma printf_check(printf) const`
`psect`	Rename compiler-generated psect.	`#pragma psect nvBANK0=my_nvram`
`regsused`	Specify registers used by function.	`#pragma regsused myFunc wreg,fsr`
`switch`	Specify code generation for switch statements.	`#pragma switch direct`
`warning`	Control messaging parameters.	`#pragma warning disable 299,407`