[avr-libc-dev] Re: headers only / bootstrapping an avr toolchain

[Sven Köhler]

Weddington, Eric schrieb:
> Do Gentoo developers not know how to read documentation?:
> <http://www.nongnu.org/avr-libc/user-manual/install_tools.html>

I'm not sure who developed the avr-libc package for Gentoo. But it turns 
out, that running
  crossdev --without-headers -S -t avr

works just fine.

> Information on how to build an AVR toolchain has been in the avr-libc user 
> manual for a long time.
>
> If you just want to build a C and C++ toolchain for the AVR then build, in 
> order:
> - binutils
> - gcc
> - avr-libc
>
> I also happen to build the Objective C compiler for the AVR (not that anyone in 
> their right mind would use it), and I end up doing:
> - binutils
> - gcc, C compiler only (in essence just enough to build avr-libc)
> - avr-libc
> - gcc, full build for c, c++, objc
>
> I do this because the objc compiler needs to have the headers built and 
> installed first. The C and C++ compilers don't seem to have a problem with that 
> (at least for the AVR).

So that could be a problem. So actually there is a dependency of the 
gcc-package (including objc) on the avr-libc headers? So instead of 
building gcc twice, it might be better to install avr-libc's headers 
after binutils and before gcc?

> If the avr-libc documentation is lacking then please suggest a patch so we can 
> fix it.
>
> Thank you for looking into getting crossdev fixed. It has been broken for so 
> long, we have just been telling users to stop using it to build an AVR 
> toolchain.

I'm trying my best.

I already have my C compiler installed, but things like c++/objc will be 
another big step.