[LLVMdev] Linking clang.exe takes more than two hours?
Mikael Lyngvig
mikael at lyngvig.org
Sat May 26 21:16:20 PDT 2012
G++/Mingw64 v4.7.1, ld v2.22.52. I've been checking out the process
list and ld uses 2.6 gigabytes of memory on a 2 gigabytes system. So,
I hereby learned that you need at least 4 gigabytes in your wannabe
LLVM build system :-)
I'll try your option sometime when the build is complete. It may take
hours or days until that.
Cheers,
Mikael
2012/5/27 xunxun <xunxun1982 at gmail.com>
> δΊ 2012/5/27 11:04, Mikael Lyngvig ει:
>
>> Hi,
>>
>> I'm building using MINGW64 on a very slow system (Intel Atom 330 X2 1.6
>> GHz), but it seems rather odd that the system has been linking clang.exe
>> for the past two hours. It appears that a couple of gigabytes of virtual
>> memory are being used (causing constant swapping) - the system has only 2
>> GB of physical memory.
>>
>> Is this a bug in MINGW64 (binutils 2.22) or is it just too little RAM in
>> the build machine? After all, clang.exe is only about 35 megabytes or so,
>> so you'd think that it didn't take four gigabytes to link the executable.
>> But then again, the input libraries to clang.exe take up about 1.2
>> gigabyte. If the GNU/MINGW64 linker naively reads all library files into
>> memory and then searches about to resolve unresolved symbols, I guess it
>> could cause excessive trashing during link.
>>
>>
>> Cheers,
>> Mikael
>>
>>
>> Which edition of your gcc?
>
> If newer than gcc4.6 (including 4.6), you may try to add
> -fno-keep-inline-dllexport to your compiler option, this will improve your
> link issues.
>
>
> --
> Best Regards,
> xunxun
>
>
--
-- Earth is a soddy place. Stay away!
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