Building and running llvm-py on Mac OS X

Question

I was trying to build llvm-py on Mac OS X.

This is what I tried to do, I needed to download 11vm-2.7, and the README file has this comment: Make sure '--enable-pic' is passed to LLVM's 'configure'

1. Download llvm 2.7.
2. Build llvm 2.7: Run ./configure --prefix=LLVM_DIRECTORY --enable-pic
3. Download llvm-py 0.6.
4. Build llvm-py 0.6: Run python setup.py build --llvm-config=LLVM_DIRECTORY/bin/llvm-config

Everything compiles without errors, but when I tried to run test file, I got this error message.

ImportError: 'dlopen(/Library/Python/2.7/site-packages/llvm/_core.so, 2): Symbol not found: __ZTVN4llvm16ExtractValueInstE\n Referenced from: /Library/Python/2.7/site-packages/llvm/_core.so\n Expected in: flat namespace\n in /Library/Python/2.7/site-packages/llvm/_core.so'

The message error seems to say that there is a missing function "llvmExtractValueInst" with flat namemspace issue. What's wrong with this?

In llvm 2.7, the Makefile.rules has this line

SharedLinkOptions=-Wl,-flat_namespace -Wl,-undefined -Wl,suppress \ -dynamiclib

I tried to remove the flat_namespace, but I got compilation error.

ADDED

Following locojay's answer, I could build brew and llvmpy.

export REQUIRES_RTTI=1
brew install llvm --rtti
sudo pip install git+https://github.com/llvmpy/llvmpy

However, when I tried to execute the examples in the test directory, I still got different kind of error-

test> python example.py 
Traceback (most recent call last):
  File "example.py", line 4, in <module>
    from llvm import *
  File "/Library/Python/2.7/site-packages/llvm/__init__.py", line 11, in <module>
    from llvm import _core
ImportError: dlopen(/Library/Python/2.7/site-packages/llvm/_core.so, 2): Symbol not found: __ZN4llvm10DataLayout2IDE
  Referenced from: /Library/Python/2.7/site-packages/llvm/_core.so
  Expected in: flat namespace
 in /Library/Python/2.7/site-packages/llvm/_core.so 

This is the result when I run otool -L /Library/Python/2.7/site-packages/llvm/_core.so

/Library/Python/2.7/site-packages/llvm/_core.so:
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 52.0.0)

Answer 1

have a look @ docs of llvmpy

For LLVM 3.2, make sure that environment variable REQUIRES_RTTI=1 is defined when running make. Otherwise, you may see "undefined symbol: _ZTIN4llvm24PassRegistrationListenerE". Please refer to http://llvm.org/docs/Packaging.html#c-features for details.

so for me this worked

export REQUIRES_RTTI=1
brew install llvm --rtti
pip install git+https://github.com/llvmpy/llvmpy

I guess one can always give anaconda a try in the worst case....