Re: [avr-gcc-list] AVR tool chain on MacOSX

[Andreas Höschler]

Hi Jan,

I checked the Linux scripts you pointed to and tried to apply what they have 
therein. They patch the gcc 4.5.1 sources. Part of the patch is bringing the 
avr-devices.c file into the gcc source tree.

I could run all the patches on my gcc 4.5.1 tree. Unfortunately building the 
gcc fails then (see below for details)!

>> I googled a lot on this problem and this time tried to build the chain on 
>> MacOSX (recipe below). I still hit the same problem. It simply won't build 
>> code for the atmega2560 chip! :-(
> 
> The device list in gcc is in gcc/config/avr/avr-devices.c - can you see
> atmega2560/2561 there?

I then tried to copy avr-devices.c from the patched gcc 4.5.1 tree over to the 
gcc 4.2.4 tree. I can build the 4.2.4 tree but configuring avr-libc still says 
that gcc does not support atmega2560.

./configure --host=avr --prefix=$PREFIX | grep 2560

checking if avr-gcc has support for atmega2560... no
config.status: creating avr/lib/avr6/atmega2560/Makefile

And making my project afterwards still brings the same error message:

unknown MCU 'atmega2560' specified
main.c:1: error: MCU ‘atmega2560’ supported for assembler only
make: *** [toggle_led.out] Error 1

It seems you have a working gcc 4.2.4 source tree on your machine!? Would you 
be willing to tar your tree and send it over to me? This is indeed tricky stuff.

Any other ideas?

Thanks a lot,

 Andreas


**************************************************************
Running configure in multilib subdir avrtiny10
pwd: /usr/src/avr/avrgcc/avr
mkdir avrtiny10
configure: creating cache ./config.cache
checking for --enable-version-specific-runtime-libs... no
checking for a BSD-compatible install... /usr/bin/install -c
checking for gawk... awk
checking build system type... x86_64-apple-darwin10.8.0
checking host system type... avr-unknown-none
checking for avr-ar... /usr/local/avr/avr/bin/ar
checking for avr-lipo... avr-lipo
checking for avr-nm... /usr/src/avr/avrgcc/./gcc/nm
checking for avr-ranlib... /usr/local/avr/avr/bin/ranlib
checking for avr-strip... /usr/local/avr/avr/bin/strip
checking whether ln -s works... yes
checking for avr-gcc... /usr/src/avr/avrgcc/./gcc/xgcc 
-B/usr/src/avr/avrgcc/./gcc/ -B/usr/local/avr/avr/bin/ 
-B/usr/local/avr/avr/lib/ -isystem /usr/local/avr/avr/include -isystem 
/usr/local/avr/avr/sys-include  -mmcu=avrtiny10
checking for suffix of object files... configure: error: in 
`/usr/src/avr/avrgcc/avr/avrtiny10/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.
make[1]: *** [configure-target-libgcc] Error 1
make: *** [all] Error 2
admins-Mac-mini-2:avrgcc root#