[Sdcc-user] Alice and her 8051 !?!

[Robin S. <net...@et...>]

Greetings all.

I've been tinkering with a general purpose 89c51Rx+ based board I built f=
or=20
fun.
Was trying to fiddle around with sdcc and came up with some queries.
These MAY not be strictly sdcc specific but I wondered if anyone else fac=
ed=20
them
Here are a set of problems I am currently facing:

1. For some god forsaken reason, I wish to do some initialisation prior t=
o the=20
invocation of the main() function entry point. And I want to do it in asm=
=2E=20
So I've gone and written an __sdcc_external_startup call and all is fine =
and=20
dandy. I also wish to install my interrupt handlers by hand from here.
So I am using the .org asm directive and putting ljmps to my handlers at =
the=20
appropriate positions in the memory map and all is well.
Now I link the file containing the asm code with a .c file containing the=
=20
main() call. I do NOT see my interrupt handler anywhere in the *.lst, *.r=
st=20
files generated, even though it behaves exactly as I want it to. I can se=
e=20
the __interrupt_vectors symbol but it does not show me the code I have=20
embedded in the external_startup code. Why ?

2. Since I wish to compile a lot of code i thought I would place all of i=
t in=20
a nice make environment on my linux box. The rules I have placed are=20
exceedingly simple. The make utility searches for *.c and *.asm files=20
recursively from the root of the repository and does :

#C sources to Object code
%.rel: %.c
=09@$(CC) $(HPATH) $(CFLAGS) $@ $<

#Assembly-sources to Object code
%.rel: %.asm
=09@$(AS) $(ASFLAGS) $@  $<

where=20
CC=3Dsdcc
CFLAGS=3D-c
AS=3Dasx8051
ASFLAGS=3D-l -o -s -g

The problem is that everytime an asm file is encountered, I get an error =
such=20
as=20
"file.rel: cannot open" and make bombs out.

There are no permission related problems at all.
Am I missing something ?

I would be most grateful if someone could suggest some solutions.

Many thanks!
Robin.