我创建了一个新的 conda 环境
user@machine:~/project$ conda create -n test-env -c numba python=3.5.2 llvmdev=3.8
Fetching package metadata ...........
Solving package specifications: .
Package plan for installation in environment /home/user/anaconda2/envs/test-env:
The following NEW packages will be INSTALLED:
llvmdev: 3.8.1-7 numba
openssl: 1.0.2k-0
pip: 9.0.1-py35_1
python: 3.5.2-0
readline: 6.2-2
setuptools: 27.2.0-py35_0
sqlite: 3.13.0-0
system: 5.8-2 numba
tk: 8.5.18-0
wheel: 0.29.0-py35_0
xz: 5.2.2-1
zlib: 1.2.8-3
Proceed ([y]/n)? y
#
# To activate this environment, use:
# > source activate test-env
#
# To deactivate this environment, use:
# > source deactivate test-env
#
然后激活它并尝试专门使用 pip （不是 conda）来安装 llvmlite 和 numba，这似乎成功了。 （注：我也尝试过--no-cache-dir并且它不会改变任何东西。）
user@machine:~/project$ source activate test-env
(test-env) user@machine:~/project$ pip install llvmlite==0.15 numba==0.30.1
Collecting llvmlite==0.15
Collecting numba==0.30.1
Collecting numpy (from numba==0.30.1)
Using cached numpy-1.12.0-cp35-cp35m-manylinux1_x86_64.whl
Installing collected packages: llvmlite, numpy, numba
Successfully installed llvmlite-0.15.0 numba-0.30.1 numpy-1.12.0
但库没有正确安装，
(test-env) user@machine:~/project$ python
Python 3.5.2 |Continuum Analytics, Inc.| (default, Jul 2 2016, 17:53:06)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numba
Traceback (most recent call last):
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/llvmlite/binding/ffi.py", line 42, in <module>
lib = ctypes.CDLL(os.path.join(_lib_dir, _lib_name))
File "/home/user/anaconda2/envs/test-env/lib/python3.5/ctypes/__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
OSError: /home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/llvmlite/binding/libllvmlite.so: undefined symbol: _ZNKSt14error_category23default_error_conditionEi
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/numba/__init__.py", line 9, in <module>
from . import config, errors, runtests, types
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/numba/config.py", line 11, in <module>
import llvmlite.binding as ll
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/llvmlite/binding/__init__.py", line 6, in <module>
from .dylib import *
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/llvmlite/binding/dylib.py", line 4, in <module>
from . import ffi
File "/home/user/anaconda2/envs/test-env/lib/python3.5/site-packages/llvmlite/binding/ffi.py", line 47, in <module>
lib = ctypes.CDLL(_lib_name)
File "/home/user/anaconda2/envs/test-env/lib/python3.5/ctypes/__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
OSError: libllvmlite.so: cannot open shared object file: No such file or directory
为什么conda安装llvmdev来自 numba 通道的无法“正常工作”。
在我的用例中，我将进入一个具有 pip 样式的 requests.txt 文件的项目，并且我需要从该文件创建 conda 环境。有些项目开发者会使用venv+pip，有些会使用conda，而它包含的一些包在任何anaconda渠道中都找不到，所以必须安装pip。除了requirements.txt之外，我们不想维护单独的envrionment.yaml，因此从conda环境中的requirements.txt安装是我的约束的一部分。
一切似乎都正常，除了 numba/llvmlite 的 pip 安装，它需要 llvm 3.8+ 的系统依赖性。不过，我想作为 conda 环境的一部分来满足这一点。
如何确保 conda 环境中存在用于安装 numba 和 llvmlite 的正确 llvmdev？
