[LLVMdev] Building front end under OS X

[Christopher Lamb]

On Apr 22, 2007, at 3:43 PM, Chris Lattner wrote:

> On Sun, 22 Apr 2007, Christopher Lamb wrote:
>> When built using the guidelines in the README.LLVM to use the  
>> system's
>> libstdc++ I get the following types of errors whenever I try to  
>> use the
>> standard library (say by running the front end test suite in llvm/ 
>> test):
>>
>> /usr/include/c++/4.0.0/cmath:49:28: error: bits/c++config.h: No  
>> such file or
>> directory
>> /usr/include/c++/4.0.0/iosfwd:45:29: error: bits/c++locale.h: No  
>> such file or
>> directory
>> /usr/include/c++/4.0.0/iosfwd:46:25: error: bits/c++io.h: No such  
>> file or
>> directory
>> /usr/include/c++/4.0.0/bits/atomicity.h:38:30: error: bits/ 
>> atomic_word.h: No
>> such file or directory
>
> I'm not sure.  This is strange, perhaps others will have a better  
> idea.
>
>> Is this a product of the system's libstdc++ getting out of date  
>> w.r.t. the
>> llvm-gcc tip? Should one now be building llvm-gcc's libstdc++  
>> rather than
>> using the system version on OS X?
>
> When building on macosx, you always want to remove the libstdc++  
> directory
> out of the llvm-gcc srcdir (so that you build with the system  
> libstdc++).
> This is because the system version and the llvm-gcc version are subtly
> different, so you end up with abi mismatches if you don't.

Ahh. Well, with the SVN version of libstc++ the llvm/tests front end  
tests now pass, but ABI mismatches are a sinker...

--
Christopher Lamb



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