4.6.1 Options Specific to PIC Devices

The options shown in the table below are useful when compiling for 8-bit Microchip PIC devices with the MPLAB XC8 compiler and are discussed in the sections that follow.

Table 4-6. Machine-specific Options
Option (links to explanatory section)	Controls
`-maddrqual=action`	How the compiler will respond to storage qualifiers.
`-mchecksum=specs`	The generation and placement of a checksum or hash.
`-mcodeoffset=offset`	The offset applied to reset and interrupt vectors.
`-m[no-]config`	Whether the device will be programmed with default configuration bit values.
`-mcpu=device`	The target device that code will be built for.
`-mdebugger=type`	Which debugger will be in use when executing the code.
`-m[no-]default-config-bits`	See `-m[no-]config`.
`-mdfp=path`	Which device family pack to use.
`-m[no-]download`	How the final HEX file is conditioned.
`-m[no-]download-hex`	See `-m[no-]download`.
`-memi=mode`	The external memory interface that will be used.
`-merrata=type`	Which workarounds to errata will be applied by the compiler.
`-mheap=size`	The maximum allowable size for the heap.
`-m[no-]ivt=address`	The interrupt vector table selected at startup.
`-m[no-]keep-startup`	Whether the runtime startup source is deleted after compilation.
`-mmaxichip`	Use of a hypothetical device with full memory.
`-m[no-]osccal`	Whether the oscillator will be calibrated.
`-m[no-]oscval=value`	The oscillator calibration value.
`-mram=ranges`	Data memory that is available for the program.
`-mreserve=space@start:end`	The address ranges in the memory space to be reserved.
`-m[no-]resetbits`	Whether the device status bits should be preserved.
`-mrom=ranges`	Program memory that is available for the program.
`-m[no-]save-resetbits`	See `-m[no-]resetbits`.
`-mshroud`	Whether the output file should obfuscate the source code.
`-msmart-io-format="fmt"`	The functionality (size) of formatted IO functions linked in.
`-mstack=model[:size]`	Which data stack will be used by default.
`-m[no-]stackcall`	Whether functions can be called via lookup tables.
`-msummary=types`	What memory summary information is produced.
`-mundefints=action`	How the compiler completes unimplemented interrupts.
`-m[no-]use-ivt`	see `-m[no-]ivt`.