使用pyenv在Mac上安装Python 3.9.0失败求助

我已安装Python 3.12，需要同时使用Python 3.9，但通过pyenv安装3.9.0时构建失败，执行命令及报错信息如下：

sudo pyenv install 3.9.0
python-build: use openssl@1.1 from homebrew
python-build: use readline from homebrew
Downloading Python-3.9.0.tar.xz...
-> https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tar.xz
Installing Python-3.9.0...
python-build: use readline from homebrew
python-build: use zlib from xcode sdk

BUILD FAILED (OS X 13.6.7 using python-build 1.2.21)

Inspect or clean up the working tree at /tmp/python-build.20240806171953.65977
Results logged to /tmp/python-build.20240806171953.65977.log

日志片段： #

(.venv) rmanoj@C02D76RZMD6R cicd % cat /tmp/python-build.20240806171953.65977.log 
/tmp/python-build.20240806171953.65977 ~/cicd
/tmp/python-build.20240806171953.65977/Python-3.9.0 /tmp/python-build.20240806171953.65977 ~/cicd
checking build system type... x86_64-apple-darwin22.6.0
checking host system type... x86_64-apple-darwin22.6.0
checking for python3.9... python3.9
checking for --enable-universalsdk... no
checking for --with-universal-archs... no
checking MACHDEP... "darwin"
checking for gcc... clang
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking how to run the C preprocessor... clang -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for a sed that does not truncate output... /usr/local/bin/gsed
checking for --with-cxx-main=<compiler>... no
checking for clang++... no
configure:

解决方法 #

1. 补全C++编译器 #

日志明确显示找不到clang++，先安装Xcode命令行工具：

xcode-select --install

若已安装，重置路径确保生效：

sudo xcode-select --reset

2. 更新并安装依赖库 #

通过Homebrew更新依赖，确保pyenv所需库完整：

brew update
brew install openssl@1.1 readline zlib

3. 指定依赖路径安装Python 3.9.0 #

不要用sudo执行pyenv安装（pyenv是用户级工具，sudo会导致权限问题），直接用以下命令传递依赖路径：

env PATH="$(brew --prefix openssl@1.1)/bin:$(brew --prefix readline)/bin:$(brew --prefix zlib)/bin:$PATH" \
LDFLAGS="-L$(brew --prefix openssl@1.1)/lib -L$(brew --prefix readline)/lib -L$(brew --prefix zlib)/lib" \
CPPFLAGS="-I$(brew --prefix openssl@1.1)/include -I$(brew --prefix readline)/include -I$(brew --prefix zlib)/include" \
pyenv install 3.9.0

4. 验证安装结果 #

安装完成后切换版本并检查：

pyenv global 3.9.0
python --version  # 正常会显示Python 3.9.0

内容的提问来源于stack exchange，提问作者Manoj Ramakrishnan