Linux中openssl/opensslv.h找不到问题的解决方法

前言

众所周知scrapy是Python中鼎鼎大名的爬虫框架，在安装scrapy过程中碰到了openssl某个文件找不到的问题，并进行了分析，记录之。

一、scrapy以及安装过程

Scrapy是python中鼎鼎大名的爬虫框架，笔者在Centos 7系统之上进行安装，发现了如下问题：

>> pip install scrapy

由于安装过程中的过程信息比较多，这里只列出了其中的关键片段信息：

running egg_info

writing requirements to src/cryptography.egg-info/requires.txt

writing src/cryptography.egg-info/PKG-INFO

writing top-level names to src/cryptography.egg-info/top_level.txt

writing dependency_links to src/cryptography.egg-info/dependency_links.txt

writing entry points to src/cryptography.egg-info/entry_points.txt

reading manifest file 'src/cryptography.egg-info/SOURCES.txt'

reading manifest template 'MANIFEST.in'

no previously-included directories found matching 'docs/_build'

warning: no previously-included files matching '*' found under directory 'vectors'

writing manifest file 'src/cryptography.egg-info/SOURCES.txt'

running build_ext

generating cffi module 'build/temp.linux-x86_64-2.7/_padding.c'

creating build/temp.linux-x86_64-2.7

generating cffi module 'build/temp.linux-x86_64-2.7/_constant_time.c'

generating cffi module 'build/temp.linux-x86_64-2.7/_openssl.c'

building '_openssl' extension

creating build/temp.linux-x86_64-2.7/build

creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7

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 build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o

build/temp.linux-x86_64-2.7/_openssl.c:434:30: fatal error: openssl/opensslv.h: No such file or directory

#include <openssl/opensslv.h>

^

compilation terminated.

error: command 'gcc' failed with exit status 1

----------------------------------------

Command "/usr/bin/python2 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-hRMlG0/cryptography/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-ReCoWo-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-hRMlG0/cryptography/

[root@AY131203102210033c39Z ~]

# yum install openssl build/temp.linux-x86_64-2.7/_openssl.c:434:30: fatal error: openssl/opensslv.h: No such file or directory

^C

Exiting on user cancel.

由于确实openssl.c文件而安装失败了，貌似没有找到对应的文件

二、问题分析

首先怀疑openssl没有安装，故先进行openssl的检查：

>> yum info openssl

Linux中openssl/opensslv.h找不到问题的解决方法

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