Compiling

The gcc 6809 compiler is (at the time of writing) called with the options:

• -quiet

• -fno-gcse

• -fno-toplevel-reorder

• -fverbose-asm

• -W

• -Wall

• -Wextra

• -Wconversion

• -Werror

• -fomit-frame-pointer

• -mint8

• -msoft-reg-count=0

• -std=gnu99

• -fno-time-report

• -IC/PeerC/vectrex/include

Which in general means - use CLEAN good C, since everything, even the tiniest thing will be regarded as an error (-Wall / - Werror).

Two notable options:

-mint8
Tells the compiler that "int" is 8 bit, which means more verbose, the compiler knows following data types:

• int

• unsigned int

• signed int

• char

• unsigned char

• signed char

• long

• signed long

• unsigned long

int is 8 bit
char is 8 bit
long is 16 bit

but int != char type wise

-fomit-frame-pointer
Ensures that gcc does not generate an additional framepointer for each function. If an additional framepointer is generated, it makes the generated code quite "bloated" and not extremely performant.

CFLAGS
The above mentioned flags can be configured in the "project" panel of the "C" project. You can do much mischieve in changing them - be carefull!

Switching the checkbox "PeerC" off and on - restores the default settings!

Note:
If you set the option to "-fomit-frame-pointer" Vide automatically generates upon compile time a "#define OMMIT_FRAMEPOINTER=1" - so that you can check that with your sources.