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Re: [avr-gcc-list] Problems w/ gcc, linux, avrmega8

From: Steve Joiner
Subject: Re: [avr-gcc-list] Problems w/ gcc, linux, avrmega8
Date: Sun, 18 Aug 2002 13:10:06 -0700 (PDT)


I'm using the latest CVS sources on linux as well.  I can compile and
link as you show below, but there's something wrong with the linker. 
Even though it links, the sections in the map file are all messed up. 
For example, I get a 64k SRAM section when linking for the atmega8. 
I've posted a message to the list, but noone has replied with any help.

I'd be interested in finding a solution to this problem as well.  If
anyone even has any suggestions or pointers, I'm more than willing to
do some detective work -- I'm just at a loss for what to try next.


--- Ross Thompson <address@hidden> wrote:
> I cannot seem to build binaries for the atmega8 with the current
> versions of the gnu tool set.  I've been trying for several weeks,
> with various different versions.  The current state of play is:
> binutils from CVS, today
>     pratchah[2] avr-ld --version
>     GNU ld version 2.13.90 20020818
> gcc from CVS, today
>     pratchah[3] avr-gcc --version
>     avr-gcc (GCC) 3.3 20020818 (experimental)
> avr libc: 
> avr-libc-20020630.tar.gz
> I compile with the following line:
> avr-gcc -c -g -O3 -Wall -Wstrict-prototypes -Wa,-ahlms=tqw.lst
>     -mmcu=atmega8 -I. blah.c -o blah.o
> which seems to work fine.
> I link with this line:
> avr-gcc blah1.o blah2.o blah3.o blah4.o 
>     -Wl,-Map=tqw.map,--cref,-mavrmega8 -mmcu=atmega8 -o tqw1.elf
> And I get this:
> /usr/local/avr/lib/gcc-lib/avr/3.3/../../../../avr/bin/ld:
>     unrecognised emulation mode: avrmega8
> Supported emulations: avr85xx avr1200 avr23xx avr44x4 avr4433
>     avrmega603 avrmega103 avrmega161 avr1 avr2 avr3 avr4 avr5
> So, what am I doing wrong?
> Any help appreciated, I'm on kind of a short deadline here.
> - Ross
> P.S. I've tried change 'avrmega8' to 'avr4' on the link line.  This
> makes
> the program link, but it doesn't run, even though the code compiles
> and links correctly on my friends PC version of the tool set.
> ---
> misocainea (n) Hatred of anything new.
> avr-gcc-list at http://avr1.org

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