使用文档：http://doc.pypy.org/en/latest/install.html
pypy的安装：
官网下载对应的安装包：
http://pypy.org/download.html
https://bitbucket.org/pypy/pypy/downloads/
解压放到指定目录，
pip的安装：
https://github.com/anpengapple/pypy_get_pip
https://raw.githubusercontent.com/anpengapple/pypy_get_pip/master/get-pip.py
进入bin目录：
wget https://bootstrap.pypa.io/get-pip.py
./pypy3 get_pip.py
ubuntu安装：
参考：https://askubuntu.com/questions/441981/how-to-install-pypy3-on-ubuntu-for-newbies
sudo apt-get install gcc make python-dev libffi-dev libsqlite3-dev pkg-config libz-dev libbz2-dev libncurses-dev libexpat1-dev libssl-dev libgc-dev python-sphinx python-greenlet openssl wget https://bitbucket.org/pypy/pypy/downloads/pypy3-v6.0.0-linux64.tar.bz2 tar jxvf pypy3-v6.0.0-linux64.tar.bz2 mv pypy3-v6.0.0-linux64 /opt/pypy3 ln -s /opt/pypy3/bin/pypy3 /usr/local/bin/pypy3
ubuntu安装libssl-devel
apt-get install aptitude apt-get install openssl libssl aptitude libssl-dev
apt-get安装时会默认选择预设的依赖版本。
aptitude安装时会提示是否选择默认设定的依赖版本，如果选n，会对库进行依赖降级，从而安装期望的版本。
mac自动安装pypy
brew search pypy brew install pypy3
安装末尾：
libffi is keg-only, which means it was not symlinked into /usr/local,
because some formulae require a newer version of libffi.
For compilers to find libffi you may need to set:
export LDFLAGS="-L/usr/local/opt/libffi/lib"
==> pypy3
A "distutils.cfg" has been written to:
/usr/local/opt/pypy3/libexec/lib-python/3/distutils
specifying the install-scripts folder as:
/usr/local/share/pypy3
If you install Python packages via "pypy3 setup.py install", easy_install_pypy3,
or pip_pypy3, any provided scripts will go into the install-scripts folder
above, so you may want to add it to your PATH *after* /usr/local/bin
so you don't overwrite tools from CPython.
Setuptools and pip have been installed, so you can use easy_install_pypy3 and
pip_pypy3.
To update pip and setuptools between pypy3 releases, run:
pip_pypy3 install --upgrade pip setuptools
See: https://docs.brew.sh/Homebrew-and-Python
root权限安装packages
sudo su -
numpy的安装：
参考官网：http://pypy.org/download.html
./pypy-xxx/bin/pip install cython numpy pypy -m pip install git+https://bitbucket.org/pypy/numpy.git
Alternatively, the direct way:
git clone https://bitbucket.org/pypy/numpy.git cd numpy pypy setup.py install
If you installed to a system directory, you need to also run this once:
sudo pypy -c 'import numpy'
执行安装：
pypy3 -m pip install cython numpy scipy
pypy3 numpy安装报错，错误信息：
File "numpy/core/setup.py", line 666, in get_mathlib_info
raise RuntimeError("Broken toolchain: cannot link a simple C program")
RuntimeError: Broken toolchain: cannot link a simple C program
解决：安装 xcode command line tool
macos安装xcode command line tool的两种方法:
Terminal 运行 xcode-select --install 然后点击安装
登录https://developer.apple.com/download/more/ 然后下载 dmg 安装
安装好后，在系统设置点软件更新，将系统更新到最新，重启。就可以安装了。