[cfe-dev] [LLVMdev] clang/LLVM cross testing environment

Jim Grosbach grosbach at apple.com
Tue Jan 18 13:34:13 PST 2011

Very cool! Thanks for the update, Richard.


On Jan 17, 2011, at 2:30 AM, Richard Pennington wrote:

> Hi,
> I've been working on combining LLVM, clang, the NetBSD standard C 
> library, compiler-rt, QEMU, GDB, and GNU binutils as a cross compilation 
> environment. My goal is to target small embedded systems, but I think 
> that what I'm working on may be of interest to other LLVM/clang 
> developers as I have been able to use the environment to fix several 
> code generation issues in LLVM.
> As of today, I can compile non-trivial programs for ARM, i386, Mips, 
> Microblaze, PowerPC, PowerPC64, and X86_64. These programs can be run 
> with the modified NetBSD C library under QEMU in Linux user space 
> emulation mode on my X86_64 Linux box. If anyone is interested in trying 
> it out it is at http://ellcc.org.
> Some important notes:
> * I have built this on a X86_64 Linux system only. Linux is required to 
> get the QEMU Linux user mode support.
> * The SVN checkout is huge, since it has everything mentioned above in it.
> * This is a work in progress: There are things that don't work. Not for 
> the faint of heart!
> * It is fairly easy to build the complete package, see 
> http://ellcc.org/installation.html and http://ellcc.org/targetsupport.html
> * Not all of the NetBSD standard library has been ported. There are a 
> lot of system calls, etc. that have not been tested. I've been adding 
> things as needed, not in any systematic way.
> * It is currently based on a fairly recent version of LLVM/clang: r122956.
> * Processor support is currently limited to those that are supported by 
> QEMU, just because I wanted to have a common run/debug environment.
> Feel free to check it out.
> -Rich
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