cvxpy stlibc++ Installation error on MacOS Mojave

Question

While trying to install cvxpy package using pip install on Mac, I get the following error message:

warning: include path for stdlibc++ headers not found; pass '-std=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found]
In file included from cvxpy/cvxcore/src/cvxcore.cpp:15:
cvxpy/cvxcore/src/cvxcore.hpp:18:10: fatal error: 'vector' file not found
#include <vector>
^~~~~~~~
1 warning and 1 error generated.
error: command '/usr/bin/clang' failed with exit status 1

Mac is running OS Mojave.

Answer 1

I have been struggling with this all weekend and the most success I have found so far is installing cvxpy in an anaconda environment with these two lines:

conda install -c conda-forge lapack
conda install -c cvxgrp cvxpy

Answer 2

I solved the issue using the following steps,

First I tried changing the flags to instruct the installation to use libc++,

CFLAGS=-stdlib=libc++ pip install cvxpy

Then it complained about having an invalid deployment target for -stdlib=libc++ (requires OS X 10.7 or later).

Then I ran the following command to set the deployment target,

export MACOSX_DEPLOYMENT_TARGET=10.10

Then running the first command(CFLAGS=-stdlib=libc++ pip install cvxpy) again installed cvxpy successfully.