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

[Rick Altherr]

On Nov 4, 2008, at 1:16 AM, Sven Köhler wrote:

> 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?

gcc only has a dependency on the avr-libc headers when building the  
objc compiler.  Since no one is likely to ever use objc, you could  
simply adjust the crossdev scripts to not attempt to build the objc  
compiler when building 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.
>
>
>
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--
Rick Altherr
address@hidden

"He said he hadn't had a byte in three days. I had a short, so I split  
it with him."
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