[LLVMdev] Building front end under OS X

[Chris Lattner]

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 Is this a product of the system's libstdc++ getting out of date w.r.t. the 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.

-Chris

-- 
http://nondot.org/sabre/
http://llvm.org/