从源代码构建 numpy 会导致错误的架构

Question

我在 Mac 上从源代码构建了 numpy，以将其链接到我的 ATLAS 库。因此，我想按照描述的方式运行它这里 使用以下选项：

export MACOSX_DEPLOYMENT_TARGET=10.10
export CFLAGS="-arch i386 -arch x86_64"
export FFLAGS="-m32 -m64"
export LDFLAGS="-Wall -undefined dynamic_lookup -bundle -arch i386 -arch x86_64"
export PYTHONPATH="/Library/Python/2.6/site-packages/"

但是编译器不喜欢所有这些 arch 标志并退出：

C compiler: cc -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -arch x86_64 -arch i386 -pipe

compile options: '-c'
cc: _configtest.c
cc _configtest.o -L/usr/local/atlas/lib -llapack -lf77blas -lcblas -latlas -o _configtest
ld: warning: ignoring file _configtest.o, file was built for i386 which is not the architecture being linked (x86_64): _configtest.o
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

删除 -arch i386 标志后，安装就可以正常进行了：

cc -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -arch x86_64 -pipe

但是在导入 numpy 时会导致错误：

>>> import numpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/numpy/__init__.py", line 170, in <module>
    from . import add_newdocs
  File "/Library/Python/2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/Library/Python/2.7/site-packages/numpy/lib/__init__.py", line 8, in <module>
    from .type_check import *
  File "/Library/Python/2.7/site-packages/numpy/lib/type_check.py", line 11, in <module>
    import numpy.core.numeric as _nx
  File "/Library/Python/2.7/site-packages/numpy/core/__init__.py", line 6, in <module>
    from . import multiarray
ImportError: dlopen(/Library/Python/2.7/site-packages/numpy/core/multiarray.so, 2): no suitable image found.  Did find:
    /Library/Python/2.7/site-packages/numpy/core/multiarray.so: mach-o, but wrong architecture

我的arch事实上是i386并且我的machinea x86_64h。

这是否意味着我安装了错误的 ATLAS 或我在 numpy 构建中缺少某些内容？为什么我必须传递多个-arch标志？