[Flashforth-devel] Warnings from assembler

[Helge K. <Hel...@gm...>]

Hello

I am trying to evaulate a Forth for my ATmega2560. I want to work
interactively but also want to able to build the turnkey with the
assembler. Therefore I started with rebuilding Flashforth.

I use avrasm2 version 2.2.8 as it comes with Microchip Studio 7.0. I
changed the build script that it also finds the include file
m256def.inc. The resulting command to compile Flashfort is:

"C:\Program Files
(x86)\Atmel\Studio\7.0\toolchain\avr8\avrassembler\avrasm2.exe"-I
"C:\Program Files
(x86)\Atmel\Studio\7.0\packs\atmel\ATmega_DFP\1.6.364\avrasm\inc"
-Dffm2560 -Dop0 -I asm2/include/ avr/src/ff-atmega.asm -o
avr/hex/2560-16MHz-38400.hex -fI

The generated HEX file is identical to the HEX file in the repository.
That's great. Buit I get some compiler diagnostic messages:

avr/src/macros.inc(39): warning: Register r26 already defined by the
.DEF directive
avr/src/ff-atmega.asm(35): info: 'avr/src/macros.inc' included from here

The source code line macros.inc#39 defines the symbold t4:

.def t4 = r26

(The "already defined" warning also occurs for the registers r27, r30,
and r31. ) Why does the assmbler complains about r26 as already defined?
Where is it defined elsewehere? I can't find a second #include statement
that would cause the file macros.inc included twice. Did I miss something?

There is also a warning about "Use of undefined or forward referenced
symbol". But that's just a forward reference. It would be nice to
suppress that warning. But it looks that the assembler isn't that decent
to disable specific warnings.

Best reagards,
Helge