[cfe-dev] cling

[Argyrios Kyrtzidis]

On Jul 27, 2011, at 4:12 PM, Axel Naumann wrote:

> Hi Argyrios,
> 
> On 07/27/2011 08:31 PM, Argyrios Kyrtzidis wrote:
>> Technically it should be possible to have a static library in llvm
>> bitcode and load that, is it something you guys can consider ?
> 
> Implemented. You can now do e.g.
> 
> $ cat test.cxx
> #include <stdio.h>
> void HELLO() { printf("HELLO!\n");}
> $ clang -emit-llvm -c test.cxx  -o test.bc
> $ cling -ltest.bc
> $ void HELLO();
> $ HELLO()
> HELLO!
> 
> It simply uses the llvm::Linker - whatever that understands should now
> be understood by cling.

Nice, that's great!

-Argyrios

> 
> Thanks for the suggestion!
> 
> Cheers, Axel.
> 
>>> 
>>> 
>>>> 
>>>> On Jul 25, 2011, at 15:28, Axel Naumann wrote:
>>>> 
>>>>> Hi,
>>>>> 
>>>>> As we announced before
>>>>> <http://www.llvm.org/devmtg/2010-11/Naumann-Cling.pdf>, we (people from
>>>>> CERN and Fermilab) are working on the C++ interpreter(*) cling
>>>>> <http://cern.ch/cling> that's based on clang and llvm. This is in the
>>>>> context of ROOT <http://root.cern.ch> and CINT
>>>>> <http://root.cern.ch/cint>, our current C++ interpreter.
>>>>> 
>>>>> We have gotten to a stage where we believe cling is actually useful: it
>>>>> behaves like a regular interpreter!
>>>>> 
>>>>> [cling]$ #include <cmath>
>>>>> [cling]$ double x = std::sin(3.1)
>>>>> (double) 4.158066e-02
>>>>> [cling]$ .L libz
>>>>> [cling]$ #include "zlib.h"
>>>>> [cling]$ zlibVersion()
>>>>> (const char * const) "1.2.3.4"
>>>>> 
>>>>> or simply
>>>>> 
>>>>> $ echo 'extern "C" const char* zlibVersion();
>>>>> zlibVersion()' | cling -lz
>>>>> 
>>>>> (const char * const) "1.2.3.4"
>>>>> 
>>>>> and even
>>>>> 
>>>>> $ cat t.cxx
>>>>> #include "cling/Interpreter/Interpreter.h"
>>>>> void t() {
>>>>> gCling->processLine("gCling->getVersion()");
>>>>> }
>>>>> $ cling
>>>>> [cling]$ .x t.cxx
>>>>> (const char * const) "$Id: Interpreter.cpp 40322 2011-07-21 14:20:14Z
>>>>> axel $"
>>>>> 
>>>>> We would like to know whether it's just us finding this spectacular :-)
>>>>> or whether there is general interest. Our aim is to get it included in
>>>>> the clang repository.
>>>>> 
>>>>> For us, this is just the first step; we need to integrate it into the
>>>>> rest of our software wildlife here at CERN, and we need to continue to
>>>>> work on robustness and features, e.g. reloading of code. I.e. I expect
>>>>> we will maintain and continue to develop it for years to come.
>>>>> 
>>>>> Here is the code:
>>>>> svn co http://root.cern.ch/svn/root/branches/dev/cling
>>>>> 
>>>>> Let us know what you think!
>>>>> 
>>>>> Best regards,
>>>>> the cling team (Vassil, Philippe, Paul, Lukasz and Axel).
>>>>> 
>>>>> (*) Yes, it's not an interpreter, it's really an incremental compiler
>>>>> with an interactive shell with (eventually) features like automatic
>>>>> library loading and late variable binding. But it smells like an
>>>>> interpreter :-)
>>>>> _______________________________________________
>>>>> cfe-dev mailing list
>>>>> cfe-dev at cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>> 
>>>> 
>>> 
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>> 
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