3.7.1.2.1 XC8 Compiler - General Options

Use subroutines for function prologues and epilogues

This selection allows you to change how functions save registers on entry and how those registers are restored on function exit. See 3.6.1.3 Call-prologues Option.

Default char type is unsigned

Enabling this checkbox indicates that a plain char type will be treated as an unsigned char. See 3.6.3.8 Signed-char Option and 3.6.3.11 Unsigned-char Option.

Default bitfield type is unsigned

Enabling this checkbox indicates that a plain bit-field will be treated as an unsigned object. See 3.6.3.7 Signed-bitfields Option and 3.6.3.10 Unsigned-bitfields Option.