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Date: Fri, 23 Mar 2007 18:33:20 -0700
From: Tim Prince <n8tm AT aol DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: Building GCC 4.3.0 on Cygwin...
References: <Pine DOT OSF DOT 4 DOT 21 DOT 0703222205040 DOT 15035-100000 AT ax0rm1 DOT roma1 DOT infn DOT it> <4602FE46 DOT 50E27743 AT dessent DOT net>
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brian AT dessent DOT net wrote:
> Angelo Graziosi wrote:
> 
>> As I wrote:
>>
>>>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31039
> 
> Ah, okay.  I failed to see that you'd posted the config.log there.  (And
> I mentioned gmp/mpfr as I have seen that cause the build to fail in
> exactly the way you described, but it's clearly not the case here.)
> 
> The real problem seems to be that the libgcc is broken:
> 
> configure:2121:  /home/User/cvsroot/gcc-obj/./prev-gcc/xgcc
> -B/home/User/cvsroot/gcc-obj/./prev-gcc/
> -B/usr/local/i686-pc-cygwin/bin/   
> conftest.c  >&5
> /home/User/cvsroot/gcc-obj/./prev-gcc/libgcc.a(_ctors.o): In function
> `__sgetc_r':
> /usr/include/stdio.h:414: undefined reference to `_ungetc'
> /usr/include/stdio.h:410: undefined reference to `___srget_r'
> /usr/include/stdio.h:407: undefined reference to `___srget_r'
> collect2: ld returned 1 exit status
> 
> It looks like a problem with some function being defined as a macro when
> it shouldn't, or vice versa.  You'll need to look into how _ctors.o is
> built to see exactly, since I can't find any reference to _sgetc_r or
> ungetc in any of the libgcc2.{c,h} files.  You can try the trick of
> going into the libgcc build directory (you may have to "make restage1"
> to back up one stage), "rm _ctors.o" and then "make CFLAGS="-g -O2
> -save-temps"" (or some variant) and then look at the preprocessed source
> to see what's happening.
> 
> Brian
> 
Just before that, there is a reported failure of the bootstrap compiler, 
due to the trailing -V argument supplied in configure.  Most of the 
configure files in the recent 4.3 snapshots do this.  I don't have a 
clue what this -V is meant for.

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