MacOSX: unsafe use of relative rpath libboost_system.dylib

[iamyoukou]

After I built libtaichi_core.dylib and run the test code, I have this error

>>> import taichi as tc
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/YJ-work/Desktop/taichi_root/taichi/python/taichi/__init__.py", line 1, in <module>
    from taichi.core import tc_core as core
  File "/Users/YJ-work/Desktop/taichi_root/taichi/python/taichi/core/__init__.py", line 2, in <module>
    from load_core import tc_core
  File "/Users/YJ-work/Desktop/taichi_root/taichi/python/taichi/core/load_core.py", line 18, in <module>
    import taichi_core as tc_core
ImportError: dlopen(./taichi_core.so, 2): Library not loaded: libboost_system.dylib
  Referenced from: /Users/YJ-work/Desktop/taichi_root/taichi/build/taichi_core.so
  Reason: unsafe use of relative rpath libboost_system.dylib in ./taichi_core.so with restricted binary

I googled and found the problem is in libtaichi_core.dylib:

aibm8:build YJ-work$ otool -L libtaichi_core.dylib 
libtaichi_core.dylib:
	/Users/YJ-work/Desktop/taichi_root/taichi/build/libtaichi_core.dylib (compatibility version 0.0.0, current version 0.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)
	/opt/local/lib/libembree.2.dylib (compatibility version 2.0.0, current version 2.13.0)
	/System/Library/Frameworks/Python.framework/Versions/2.7/Python (compatibility version 2.7.0, current version 2.7.10)
	/opt/local/lib/libboost_system-mt.dylib (compatibility version 0.0.0, current version 0.0.0)
	/opt/local/lib/libboost_python-mt.dylib (compatibility version 0.0.0, current version 0.0.0)
	libboost_system.dylib (compatibility version 0.0.0, current version 0.0.0)
	libboost_python.dylib (compatibility version 0.0.0, current version 0.0.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.1.0)

And I changed the path libboost_system.dylib, libboost_python.dylib to:

/opt/local/lib/libboost_system.dylib (compatibility version 0.0.0, current version 0.0.0)
/opt/local/lib/libboost_python.dylib (compatibility version 0.0.0, current version 0.0.0)

then the error is gone.
The problem is: every time I rebuild libtaichi_core.dylib, I have to repeat the above things again.
Is there any way to solve this problem?

/opt/local/lib is where I put libboost_system.dylib and libboost_python.dylib.

[yuanming-hu]

Hi Jiang,

Are there libboost_system.dylib and libboost_python.dylib in $TAICHI_ROOT_DIR/taichi/build/? If so, when libtaichi_core.dylib is being built, I guess these 2 libs will be linked with higher priority than those in /opt/local/lib, resulting in relative dll path.

Please check the folder, remove the libs if they exist, and then rebuild. If the linker fails to find the two boost libs, try copying the 2 libs to /usr/local/lib.

Thanks,
Yuanming

[iamyoukou]

No libboost_system.dylib and libboost_python.dylib are in $TAICHI_ROOT_DIR/taichi/build/, and I already copied these two boost libs into /usr/local/lib.
It seems that if I use python that pre-installed by MacOSX, this unsafe use issue will happen.
But if I use python2.7 from MacPorts, nothing wrong will happen.
I think I'll just use python2.7(MacPorts) to avoid this issue.
Thank you very much : )

[yuanming-hu]

Dependency on boost is removed so this should no longer be an issue. Please reinstall taichi and make sure to install pybind11, as described in Installation.