Centos7下安装annoy报错与对应的解决方案

柔光的暖阳◎ 2023-07-24 08:15 11阅读 0赞

## annoy简单介绍 ##

annoy是高维空间求近似最近邻的一个开源库。其官网介绍如下：  
Annoy (Approximate Nearest Neighbors Oh Yeah) is a C++ library with Python bindings to search for points in space that are close to a given query point. It also creates large read-only file-based data structures that are mmapped into memory so that many processes may share the same data.  
[annoy官网连接][annoy]

## 在Centos7环境下 安装annoy的方式 ##

官网介绍：  
To install, simply do pip install --user annoy to pull down the latest version from PyPI  
在Centos7中，Python2.7环境下，用pip执行：

pip install --user annoy

后执行过程中报如下错误：

ERROR: Command errored out with exit status 1:
         command: /usr/bin/python2 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-EsJwOr/annoy/setup.py'"'"'; __file__='"'"'/tmp/pip-install-EsJwOr/annoy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-69PUs8/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /root/.local/include/python2.7/annoy
             cwd: /tmp/pip-install-EsJwOr/annoy/
        Complete output (14 lines):
        running install
        running build
        running build_py
        creating build
        creating build/lib.linux-x86_64-2.7
        creating build/lib.linux-x86_64-2.7/annoy
        copying annoy/__init__.py -> build/lib.linux-x86_64-2.7/annoy
        running build_ext
        building 'annoy.annoylib' extension
        creating build/temp.linux-x86_64-2.7
        creating build/temp.linux-x86_64-2.7/src
        gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -I/usr/include/python2.7 -c src/annoymodule.cc -o build/temp.linux-x86_64-2.7/src/annoymodule.o -D_CRT_SECURE_NO_WARNINGS -march=native -O3 -ffast-math -fno-associative-math
        gcc: error trying to exec 'cc1plus': execvp: No such file or directory
        error: command 'gcc' failed with exit status 1
        ----------------------------------------
    ERROR: Command errored out with exit status 1: /usr/bin/python2 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-EsJwOr/annoy/setup.py'"'"'; __file__='"'"'/tmp/pip-install-EsJwOr/annoy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-69PUs8/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /root/.local/include/python2.7/annoy Check the logs for full command output.

## 原因及解决方案 ##

是由于c++库版本问题导致执行失败，解决办法更新gcc，更新gcc方式有许多帖子讲的过于复杂，建议参考：  
[stackoverflow上关于升级gcc方式][stackoverflow_gcc]  
核心命令如下：

yum install centos-release-scl
    yum install devtoolset-7-gcc*
    scl enable devtoolset-7 bash
    which gcc
    gcc --version

升级完gcc后重新安装即可，祝大家学习和使用愉快！！！

[annoy]: https://pypi.org/project/annoy/
[stackoverflow_gcc]: https://stackoverflow.com/questions/36327805/how-to-install-gcc-5-3-with-yum-on-centos-7-2