[LLVMdev] using just llvm/clang for building mips llvm

[reed kotler]

Geting a seg fault. Have not investigted the cause.

rkotler at mipsswbrd002:~/richard$ tar vfxz 
~/Downloads/ellcc-mips-linux-2014-Mar-24-07-32-26.tgz

rkotler at mipsswbrd002:~/richard/ellcc/bin$ gdb ./ecc
GNU gdb (GDB) 7.4.1-debian
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "mips-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/rkotler/richard/ellcc/bin/ecc...done.
(gdb) run
Starting program: /home/rkotler/richard/ellcc/bin/ecc

Program received signal SIGSEGV, Segmentation fault.
0x02ee15dc in __init_tls ()
(gdb) bt
#0  0x02ee15dc in __init_tls ()
#1  0x02ebde44 in __init_libc ()
#2  0x02ebdebc in __libc_start_main ()
#3  0x00416ac4 in _start ()
(gdb)


rkotler at mipsswbrd002:~/richard/ellcc/bin$ ls
FileCheck      ecc-c++filt   ecc-ld.bfd   ecc-size ppc-elf-as
arm-elf-as     ecc-elfedit   ecc-nm      ecc-strings ppc64-elf-as
ecc           ecc-embedspu  ecc-objcopy  ecc-strip sparc-elf-as
ecc++           ecc-gdb         ecc-objdump  i386-elf-as x86_64-elf-as
ecc-addr2line  ecc-gprof     ecc-ranlib   microblaze-elf-as
ecc-ar           ecc-ld         ecc-readelf  mips-elf-as
rkotler at mipsswbrd002:~/richard/ellcc/bin$ ./ecc
Segmentation fault
rkotler at mipsswbrd002:~/richard/ellcc/bin$ ./ecc-ar
Segmentation fault
rkotler at mipsswbrd002:~/richard/ellcc/bin$



On 03/27/2014 03:30 PM, Richard Pennington wrote:
> On 03/27/2014 04:17 PM, reed kotler wrote:
>> In case anyone is interested....
>>
>> We don't need to compile llvm/clang using gcc anymore for the 
>> building of mips hosted llvm compilers.
>>
>> We build a linux mips hosted compiler starting with llvm/clang on x86 
>> linux using the normal configure scripts and
>> then can use that resulting compiler to build further llvm/clang 
>> native compilers on the mips linux host.
>>
>> The cross compiler and native compiler driver for Mips works 
>> seamlessly (thanks to Simon Atanasyan) just as gcc does.
>>
>> For our build slave that is connected to the llvm build bots, we are 
>> using our native clang/llvm (built as above) to built the llc
>> that is used for make check.
>>
>> I'm doing some more work to automate the testing of the recursed 
>> compilers and other verification on the mips target.
> Hi Reed,
>
> Very cool. I'd love to know if my pre-compiled Mips toolchain for 
> ELLCC (http://ellcc.org), downloadable from ftp://ellcc.org/pub, can 
> actually run on a Mips. Any idea where I could find a Mips box to try 
> it on?
>
> It was compiled using a clang based x86_64 compiler, by the way.
> The ARM binaries work just fine, at least on Fedora ARM Linux running 
> under QEMU.
>
> -Rich