2010/9/11 Ruben Van Boxem <[email protected]>:
> 2010/9/11 Ruben Van Boxem <[email protected]>
>>
>> Hi,
>>
>> Recently I started messing around with GCC and attempted to build it many
>> times. I first had lots of trouble with the 4.5 snapshots, but have now
>> moved to 4.6 and all seems well. I put all the instructions in a single file
>> (not quite a script, but almost, if you're willing to call a file with
>> commands a script).
>>
>> The goal is to build an optimized GCC for myself and perhaps later (when
>> I'm confident about the quality of it) I can upload it to Sourceforge.
>>
>> The commands are loosely based on makebuildroot.sh from mingw-w64 svn. For
>> now no multilib, but I have enabled lto and whole-program optimization,
>> along with -mtune=core2 for all parts of the process.
>>
>> I do have some specific questions though:
>> 1. Is there still an installation and/or other issue with multilib and GCC
>> 4.6 or is that all fixed now?
>> 2. Would -fomit-frame-pointer help optimization?
>> 3. Is it smart to enable 4.5's lto to a 4.6 source, or should I first get
>> a 4.6 GCC built without it?
>>
>> Thanks!
>>
>> Ruben
>
> I've run into a rather crappy problem:
>
>> Creating library file: ./shlib/libgcc_s.a.tmp
>> lto1.exe: internal compiler error: bytecode stream: trying to read 0 bytes
>> after the end of the input buffer
>> Please submit a full bug report,
>> with preprocessed source if appropriate.
>> See <http://gcc.gnu.org/bugs.html> for instructions.
>> lto-wrapper: M:\Development\msys\home\Ruben\mingw64\build\gcc\gcc\xgcc.exe
>> returned 1 exit status
>> collect2: lto-wrapper returned 1 exit status
>> make[3]: *** [libgcc_s.dll] Error 1
>
> I think this is the bootstrapped compiler trying to compile libgcc with lto
> failing (right?). I'll try disabling the lto in stage1 and see what that
> gives.
>
> Ruben
>
>
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>
Hmm, I don't get this failure on cygwin as host. Have you installed
lto on msys for native compiler before proper?
Kai
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