Numpy Install RuntimeError: Broken toolchain: cannot link a simple C program

Question

(macbook air)

I spent a while trying to install this. First off, I can\'t use Homebrew because I installed it but then the \'network connection\' dropped and now my

Answer 1

update the pip using python -m pip install --upgrade pip

then install your library pip install your_library

Answer 2

I'm having this same problem (only I'm using brew install numpy), with:

File "numpy/core/setup.py", line 686, in get_mathlib_info
    raise RuntimeError("Broken toolchain: cannot link a simple C program")
RuntimeError: Broken toolchain: cannot link a simple C program

(Here is a full gist-log of my error.)

This question has some potential solutions: Problems with pip install numpy - RuntimeError: Broken toolchain: cannot link a simple C program.

Though I don't want to resort to sudo, and I want to stick with homebrew (because I'm really aiming for a homebrewed opencv), so I've had no luck so far.

Edit: adding export ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future to my .bash_profile (as was suggested in the other question I linked) let brew install numpy almost flawlessly. All that remained after was that I had to brew link --overwrite numpy (because I had a non-brew installation of numpy before). Seems to be working now.

Answer 3

I had a similar issue with Python3 numpy install in Fedora 24

Solution provided here by Ollegn that worked for me was:

sudo dnf install python3-devel
sudo dnf install make automake gcc gcc-c++ gcc-gfortran
sudo dnf install redhat-rpm-config
sudo dnf install subversion
sudo pip3 install -U numpy

Answer 4

I ran into this issue twice, and both times I fixed it this way: abandoning pip.

First time was on osx I did brew install numpy. Homebrew will take care of all of the dependencies.

Second time was on centos7 and much like above I just yum install -y numpy.