[Tinyos-devel] RE: avr-gcc 4.x upgrade

[Eric Weddington]

Janos,

Thanks for the info.

If you need patches for binutils 2.18, and gcc 4.2.2, I have them and cand
send them to you. Alternatively, I will be committing them to the WinAVR CVS
shortly. It's somewhat of a moving target: there will be more patches soon
for more new devices.

I'm also interested in the compiler bugs that you're seeing on 4.2.2.
Contact me off list, or use the GCC bug list or the WinAVR bug list to
report. If you use the GCC bugzilla, put me in the CC list. I'm also
interested in the assertion error you're getting for the patch for bug
#25448.

Thanks,
Eric Weddington

> -----Original Message-----
> From: Janos Sallai [mailto:sallai at isis.vanderbilt.edu] 
> Sent: Wednesday, October 24, 2007 9:50 AM
> To: Eric Weddington
> Cc: Tinyos-devel at millennium.berkeley.edu
> Subject: RE: avr-gcc 4.x upgrade
> 
> Eric,
> 
> It is gcc 4.1.2 from ftp.gnu.org, with pretty much the same 
> patches as what the corresponding winavr version has (new 
> devices, atm256x, etc). I didn't apply the patch for bug 
> #25448, because it was giving an assertion error. I didn't 
> apply the one that changes the version string to include 
> "winavr", either. You may want to check the spec file in the 
> srpm for details.
> 
> I also tried a couple of other versions. These were either 
> giving internal compiler errors (e.g. 4.2.2), or it was hard 
> to find the patches with support for the latest MCUs.
> 
> Regarding the host platforms: I did some builds on 
> cygwin/win32 and linux (xubuntos). The srpms should build on 
> both, though you first make sure that the binaries are not 
> stripped by the rpmbuild scripts on cygwin (which is the default).
> 
> Binutils is version 2.17, similarly from ftp.gnu.org, with 
> the all the patches winavr has. I also included the tinyos 
> specific dollar sign patch for backwards compatibility.
> 
> Janos
> 
> -----Original Message-----
> From: Eric Weddington [mailto:eweddington at cso.atmel.com] 
> Sent: Wednesday, October 24, 2007 10:22 AM
> To: Janos Sallai; Tinyos-devel at millennium.berkeley.edu
> Cc: 'Philip Levis'; regehr at cs.utah.edu
> Subject: RE: avr-gcc 4.x upgrade
> 
>  
> 
> > -----Original Message-----
> > From: Janos Sallai [mailto:sallai at isis.vanderbilt.edu] 
> > Sent: Tuesday, October 23, 2007 9:26 PM
> > To: Tinyos-devel at millennium.berkeley.edu
> > Cc: eweddington at cso.atmel.com; Philip Levis; regehr at cs.utah.edu
> > Subject: avr-gcc 4.x upgrade
> > 
> > I spent some time with avr-gcc 4.x in the past few days. It 
> > appears to works fine with T2. All the apps compile the same 
> > way as with avr-gcc 3.x. The select few I installed on real 
> > motes appeared to work as expected. The code size is 
> > typically 5% smaller. I can share with you  the outputs of 
> > "make micaz", should you be interested in the details.
> 
> This is good news. Thanks for taking the time to look into it.
> 
> A couple of quick questions:
> What exact version of 4.x did you use?
> What host platform was this built on?
> What patches did you use on the toolchain, or, which 
> toolchain distribution
> did you use?
> 
> Thanks,
> Eric Weddington
> 
> 
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