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From:	"Jason Pyeron" <jpyeron AT pdinc DOT us>
To:	<cygwin AT cygwin DOT com>, "'GHDL discuss list'" <ghdl-discuss AT gna DOT org>
Subject:	RE: [Ghdl-discuss] GHDL-0.27 for Cygwin
Date:	Tue, 5 Aug 2008 17:29:39 -0400
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> -----Original Message-----
> From: cygwin-owner AT cygwin DOT com 
> [mailto:cygwin-owner AT cygwin DOT com] On Behalf Of Dave Korn
> Sent: Tuesday, August 05, 2008 9:56 AM
> To: 'Jason Pyeron'; 'GHDL discuss list'
> Cc: cygwin AT cygwin DOT com
> Subject: RE: [Ghdl-discuss] GHDL-0.27 for Cygwin
> 
> Jason Pyeron wrote on 05 August 2008 14:38:
> 
> >>>> Make fails with the following error:
> >>>> Comparing stages 2 and 3
> >>>> warning: ./cc1-checksum.o differs
> >>>> warning: ./libgcc/_chkstk.o differs Bootstrap comparison failure!
> >>>> ./ada/exp_aggr.o differs
> >>>> make[2]: *** [compare] Error 1
> >>>> make[2]: Leaving directory `/tmp/gcc-4.2.4-build'
> >>>> make[1]: *** [stage3-bubble] Error 2
> >>>> make[1]: Leaving directory `/tmp/gcc-4.2.4-build'
> >>>> make: *** [all] Error 2
> 
>   From this error message, your failure is happening at the 
> final stage of bootstrapping.  At this point, the new gcc has 
> been built, and is being used to rebuild itself as a 
> consistency check.  So this could be an error for one of two 
> reasons: your system gcc (3.4.4) could have compiled stage 1 
> badly in such a way that it compiled stage 2 badly in such a 
> way that it didn't rebuild itself correctly; or it could just 
> be a bug in the version of gcc that you're building.  The 
> latter is more likely than that a bug in the former could 
> propagate all the way through bootstrap, but either is still possible.
> 
> > I am able to compile c & ada support with release 4.2.0, but 4.2.1 
> > fails (identical error), this is looking like a regression.
> 
>   Yes, it does indeed.
> 
> > From the gcc-help
> > mailing list it looks like 4.2.x series is going to be very hard to 
> > get running on cygwin. Our only luck in this matter is that the 
> > problem looks to be a regression.
> 
>   If I were you, I'd file a report in the GCC bugzilla, and 
> then try using 4.3.0 instead, which I can confirm builds OOTB 
> on cygwin.
> 


The goal is to compile GHDL front end, which requires gcc=4.2.4, I assume that
means that it would not work for 4.3.x.


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