3.3.4.3 Compiler and Toolchain Options

-mcall-prologues

Use subroutines for functions prologues and epilogues

-mno-interrupts

Change stack pointer without disabling interrupts

-funsigned-char

Default char type is unsigned

-funsigned-bitfield

Default bit field is unsigned

Symbols in the source can be defined (-D) or undefined (-U). New symbol declarations can be added, modified, or reordered, using the interface buttons below:

• 
  Add a new symbol. This icon and all following icons are reused with the same meaning in other parts of the Microchip Studio interface.

• 
  Remove a symbol.

• 
  Edit symbol.

• 
  Move the symbol up in the parsing order.

• 
  Move the symbol down in the parsing order.

Contains all the included header and definition directories, which can be modified using the same interface as symbols

Optimization level (drop-down menu): -O0, -O1, -O2, -O3, -Os, -Og

No optimization, optimize for speed (level 1 - 3), optimize for size, optimize for better debugging experience

-ffunction-sections

Prepare functions for garbage collection. If a function is never used its memory will be scrapped.

-fpack-struct

Pack structure members together

-fshort-enums

Allocate only as many bytes as needed by the enumerated types

Debug level (drop-down menu): none, -g1, -g2, -g3

Specifies the level of tracing and debugging code and headers left or inserted in the source code

-Wall

All warnings

-Werror

Generation of errors instead of warnings for dubious constructs

-pedantic

Warnings demanded by strict ANSI C; reject all programs that use forbidden extensions

-w

Suppression of all warning messages

Other flags (form field)

Input other project-specific flags

-v

Verbose