[cfe-dev] clang omits a part of the code

[Nir Pluderman]

Peter, your remark regarding the HeaderSearchOptions::ResourceDir solved the problem.

My ResourceDir was an empty string, I didn't know it had to be set,
    after doing so, clang found all the required files and the program ran fine, 
    without omitting anything.

I also changed the diagnostics according to what you wrote, 
    and it's working correctly now.
    
Thank you for all your help 

    Nir.


----- Original Message -----
From: Peter Collingbourne <peter at pcc.me.uk>
Date: Friday, March 25, 2011 9:51
Subject: Re: [cfe-dev] clang omits a part of the code
To: Nir Pluderman <nirpl at bgu.ac.il>
Cc: cfe-dev at cs.uiuc.edu

> On Fri, Mar 25, 2011 at 11:31:08AM +0000, Nir Pluderman wrote:
> > Thank you for your quick response Peter,
> > 
> > I did as you said, and this is the output I got:
> > 
> >     Stack dump:
> >     0.    /usr/include/stdio.h:34:3: current parser token 'include'
> 
> This is not a standard diagnostic but part of Clang's output if it
> segfaults/asserts.  Since you received the segfault/assert 
> at the point
> where a diagnostic should be emitted, I suspect it is because 
> you did
> not create the Diagnostic object correctly.  This is how I 
> normallybuild a Diagnostic object and point it to a 
> TextDiagnosticPrinter(which should just print the diagnostics to 
> standard error):
> 
>   clang::TextDiagnosticPrinter *DiagClient =
>     new clang::TextDiagnosticPrinter(errs(), 
> clang::DiagnosticOptions());  
> IntrusiveRefCntPtr<clang::DiagnosticIDs> DiagID(new 
> clang::DiagnosticIDs());  clang::Diagnostic *Diag = new 
> clang::Diagnostic(DiagID, DiagClient);
> 
> > note:
> >     In both cases the problematic line in these standard 
> library headers is: 
> >         #include <stddef.h>
> 
> This means that Clang could not find its stddef.h header, because
> HeaderSearchOptions::ResourceDir (i.e. headerSearchOpts->ResourceDir)
> was not set correctly.  You should set it to something like
> 
> LLVM_PREFIX "/lib/clang/" CLANG_VERSION_STRING
> 
> where LLVM_PREFIX is your LLVM build directory and 
> CLANG_VERSION_STRINGis a macro defined in clang/Basic/Version.h.
> 
> Thanks,
> -- 
> Peter
> ‎
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