| Re: [embed-cdt-dev] Query regarding LLVM tool chain with Openocd |
Thanks Liviu for your valuable feedback..
Hi, Rahul --
As Liviu says, you are trying to bring together two entirely
different compiling systems. LLVM is a really cool tool for doing
new processor architectures. It's an even-lower-level virtual
machine than a Java Virtual Machine. LLVM is (currently) used for
two different compilers, CLANG (which compiles C++ and can emulate
GCC) and Crystal, which is a compiled form of Ruby. I haven't
heard of anybody successfully using GDB on CLANG, though its
source code would be a good starting point, just as Eclipse and
its Java source would be for an IDE.
All that said, this is not a trivial project. If this is an
up-and-coming architecture like ESP32 (built on the Tensilica
platform) or RISC-V you can try for support from the silicon guys
but you don't want to take this on as a hobby project if there
isn't a pot of gold in there somewhere.
The LLVM project has its own mailing lists and the FreeBSD OS
project uses CLANG as its primary compiler, but neither has a
large team or endless time and money. Those would be good places
for you to ask for guidance on what to do next.
On Tue, Dec 8, 2020 at 1:56 PM Liviu Ionescu <ilg@xxxxxxxxxx> wrote:
> On 8 Dec 2020, at 09:10, Rahul Gupta <gupta5035@xxxxxxxxx> wrote:
>
> I need to add support for a new processor using the LLVM tool chain but in eclipse not able to find any plugin for LLVM tool chain.
> Please comment if you are aware if any LLVM tool chain plugin exists.
My experience with LLVM in Eclipse is not great. There is some support in CDT, but I did not find it usable on my Mac, so I did not go very far.
> in eclipse with open ocd , in GDB client setup if i am using aarch64-none-elf-gdb.exe then i am able to proceed. If I am using lldb.exe which is part of LLVM tool chain to debug then I am getting an error in launching "Could not determine GDB version after sending lldb.exe --version" .
That's an added wrinkle. You are trying to use a Windows machine as a host for using an ARM debugger? The sources are available for LLVM and it has a relatively friendly license so if you did manage to get it to work your code would be unencumbered but again, this is non-trivial. Hope this helps, Rahul!>
> Please comment how to resolve this issue.
This is something different. The Embedded CDT debug plug-ins are based on the GDB Hardware Debugging plug-ins, available in CDT. As the name implies, they are specific to gdb, and cannot be used with lldb.
I'm afraid at this moment I don't know of a proper solution for lldb. :-(
-- Don Wilde **************************************************** * What is the Internet of Things but a system * * of systems including humans? * ****************************************************