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bug#39794: AVR-Toolchain-5 avr/io not found

From: Arun Isaac
Subject: bug#39794: AVR-Toolchain-5 avr/io not found
Date: Sun, 01 Mar 2020 12:37:35 +0530

>> arm-none-eabi-toolchain is conflicting with avr-toolchain since both are
>> setting the CROSS_* environment variables. See the output of `avr-gcc -E -v 
>> -` below.
>> This should probably be considered a bug. But I have no idea how to fix
>> this. :-( What do you think?
> I agree. The problem I see here is the environment variable game we have here.
> One option is to create cross compilers with the include paths inserted on 
> them instead of taking environment variables as a default.

Or, we could have separate environment variables CROSS_AVR_C_INCLUDE_PATH
and CROSS_ARM_C_INCLUDE_PATH. But that sounds like too many environment
variables! :-P

> If they had the correct directories in their default includepaths
> everything would work correctly.
> I never did this before but it should be possible, probably affecting
> cross-gcc's configure step.

Something like this is possible too.

> We can start by pushing it and then keep solving the conflict issue
> and the upgrades to gcc-9.


>> Also, our avr-gcc package should probably be updated to the latest
>> avr-gcc-9.
> Once the current fix is applied next fixes should be possible.
> Why wasn't the patch included in the project?

I don't know. I have asked Danny at bug 24416 to push the patch. Let's
wait for a response.

Once Danny's patch is pushed, I'll open a new bug reporting the arm avr

Also, I'm closing this bug report now since this issue is handled by

Thanks! :-)

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