[LLVMdev] [Questions] clang cross compilation and SimpleScalar simulation

[陳奕梅]

Dear all

The reason for using SimpleScalar is that the project, Sim-panalyzer, based
on SimpleScalar can estimate power consumption.
If anybody know the other simulators that can  estimate power consumption,
please contact to me ! Thanks a lot.

Best regards, :)

Yi-Mei Chen

2012/9/26 Jim Grosbach <grosbach at apple.com>

> Simplescalar is not compatible with llvm because the binutils simplescalar
> is based on is ancient.
>
> Jim
>
>
> On Sep 26, 2012, at 12:21 AM, 陳奕梅 <ymchen at sslab.cs.nctu.edu.tw> wrote:
>
> Dear all
>
> I use arm-linux-gcc 2.95.2, because the code generated by version 3.X and
> 4.X can not run on SimpleScalar.
> So I use the arm-linux-gcc 2.95.2 *only*, the version is recommended by
> SimpleScalar.
> The code generated by arm-linux-gcc 2.95.2 can run on SimpleScalar.
> Now I want to use llvm/clang to generate ARM assembly code and
> arm-linux-gcc 2.95.2 to be assembler.
> Unfortunately, I got some error messages below :
>
> hello.s: Assembler messages:
> hello.s:1: Error: Unknown pseudo-op:  `.syntax'
> hello.s:2: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:3: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:4: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:5: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:6: Error: Unknown pseudo-op:  `.eabi_attribute'
> make: *** [all] Error 1
>
> Then I try commends :
> $ clang -ccc-host-triple armv4-none-linux-gnueabi -c hello.c -emit-llvm -o
> hello.bc
> $ llc -O3 -o hello.s -march=arm -mcpu=strongarm1100 hello.bc
> $ arm-linux-gcc -mcpu=strongarm1100 hello.s -static -O3 -o hello
>
>  I got some error messages:
>
> hello.s: Assembler messages:
> hello.s:1: Error: Unknown pseudo-op:  `.syntax'
> hello.s:2: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:3: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:4: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:5: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:6: Error: Unknown pseudo-op:  `.eabi_attribute'
> hello.s:14: Error: bad instruction `push {r11,lr}'
> hello.s:18: Error: bad instruction `pop {r11,lr}'
> hello.s:28: Warning: Unrecognized .section attribute: want a,w,x
> hello.s:28: Warning: Unrecognized .section attribute: want a,w,x
> hello.s:28: Error: Rest of line ignored. First ignored character is `,'
>
> P.S.
> The version recommended by SimpleScalar :
> gcc 2.95.2
> binutils 2.10
> glibc 2.1.3
>
> Thanks a lot !
>
> Best regards, :)
>
> Yi-Mei Chen
>
> 2012/9/26 陳韋任 (Wei-Ren Chen) <chenwj at iis.sinica.edu.tw>
>
>> Hi Jim,
>>
>> On Tue, Sep 25, 2012 at 10:52:58AM -0700, Jim Grosbach wrote:
>> > These errors are from the assembler, not LLVM. Specifically, your
>> binutils is
>> > too old. Given that it doesn't even recognize the ".syntax" directive,
>> they're
>> > *very* much too old. You need to upgrade.
>> > -Jim
>>
>>   She said in her previous mail,
>>
>>     P.S. Because I got error when I use arm-linux-gcc (gcc version 3.X or
>> 4.X),
>>     I use officially recommended version 2.95,2.
>>
>>   I don't know what's her problem while using newer toolchain. :/
>>
>>   奕梅，you should use latest toolchain if possible, and post your problem
>> here
>> to see if it comes from LLVM/Clang or other place. Also, where do you
>> read that
>> version is recommended?
>>
>> Regards,
>> chenwj
>>
>> --
>> Wei-Ren Chen (陳韋任)
>> Computer Systems Lab, Institute of Information Science,
>> Academia Sinica, Taiwan (R.O.C.)
>> Tel:886-2-2788-3799 #1667
>> Homepage: http://people.cs.nctu.edu.tw/~chenwj
>>
>
>
>
>
>


-- 
Best regards, :)

Yi-Mei Chen
Master's program the second grade
Department of Computer Science
National Chiao Tung University
1001 University Road, Hsinchu 30010, Taiwan
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