一、error: command ‘x86_64-linux-gnu-gcc’ failed with exit status 1（mysqlclient）

大致报错如下：

Running setup.py install for mysqlclient ... error    ERROR: Command errored out with exit status 1:     command: /home/kai/python/env/djangoblog/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-d07knlry/mysqlclient/setup.py'"'"'; __file__='"'"'/tmp/pip-install-d07knlry/mysqlclient/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-mkay836m/install-record.txt --single-version-externally-managed --compile --install-headers /home/kai/python/env/djangoblog/include/site/python3.6/mysqlclient         cwd: /tmp/pip-install-d07knlry/mysqlclient/    Complete output (33 lines):    /usr/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'      warnings.warn(msg)    running install    running build    running build_py    creating build    creating build/lib.linux-x86_64-3.6    creating build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/__init__.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/_exceptions.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/compat.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/connections.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/converters.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/cursors.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/release.py -> build/lib.linux-x86_64-3.6/MySQLdb    copying MySQLdb/times.py -> build/lib.linux-x86_64-3.6/MySQLdb    creating build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/__init__.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/CLIENT.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/CR.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/ER.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/FIELD_TYPE.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    copying MySQLdb/constants/FLAG.py -> build/lib.linux-x86_64-3.6/MySQLdb/constants    running build_ext    building 'MySQLdb._mysql' extension    creating build/temp.linux-x86_64-3.6    creating build/temp.linux-x86_64-3.6/MySQLdb    x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -Dversion_info=(1,4,4,'final',0) -D__version__=1.4.4 -I/usr/include/mysql -I/usr/include/python3.6m -I/home/kai/python/env/djangoblog/include/python3.6m -c MySQLdb/_mysql.c -o build/temp.linux-x86_64-3.6/MySQLdb/_mysql.o    x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.6/MySQLdb/_mysql.o -lmysqlclient -lpthread -lz -lm -lrt -lssl -lcrypto -ldl -o build/lib.linux-x86_64-3.6/MySQLdb/_mysql.cpython-36m-x86_64-linux-gnu.so    /usr/bin/ld: cannot find -lssl    /usr/bin/ld: cannot find -lcrypto    collect2: error: ld returned 1 exit status    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1    ----------------------------------------ERROR: Command errored out with exit status 1: /home/kai/python/env/djangoblog/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-d07knlry/mysqlclient/setup.py'"'"'; __file__='"'"'/tmp/pip-install-d07knlry/mysqlclient/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-mkay836m/install-record.txt --single-version-externally-managed --compile --install-headers /home/kai/python/env/djangoblog/include/site/python3.6/mysqlclient Check the logs for full command output.

解决办法：

二、pip安装出现Command “python setup.py egg_info” failed with error code 1 的解决方案

报错如下：

ERROR: Command errored out with exit status 1:     command: /home/kai/python/env/djangoblog/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-kzmacki4/django-haystack/setup.py'"'"'; __file__='"'"'/tmp/pip-install-kzmacki4/django-haystack/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-kzmacki4/django-haystack/pip-egg-info         cwd: /tmp/pip-install-kzmacki4/django-haystack/    Complete output (33 lines):    WARNING: The repository located at pypi.douban.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS we recommend you use HTTPS instead, otherwise you may silence this warning and allow it anyway with '--trusted-host pypi.douban.com'.    ERROR: Could not find a version that satisfies the requirement setuptools_scm (from versions: none)    ERROR: No matching distribution found for setuptools_scm    Traceback (most recent call last):      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/installer.py", line 119, in fetch_build_egg        subprocess.check_call(cmd)      File "/usr/lib/python3.6/subprocess.py", line 311, in check_call        raise CalledProcessError(retcode, cmd)    subprocess.CalledProcessError: Command '['/home/kai/python/env/djangoblog/bin/python3', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmpobxct58l', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.        During handling of the above exception, another exception occurred:        Traceback (most recent call last):      File "
   
    ", line 1, in 
    
           File "/tmp/pip-install-kzmacki4/django-haystack/setup.py", line 71, in 
     
              setup_requires=['setuptools_scm'],      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/__init__.py", line 144, in setup        _install_setup_requires(attrs)      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/__init__.py", line 139, in _install_setup_requires        dist.fetch_build_eggs(dist.setup_requires)      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/dist.py", line 721, in fetch_build_eggs        replace_conflicting=True,      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/pkg_resources/__init__.py", line 782, in resolve        replace_conflicting=replace_conflicting      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1065, in best_match        return self.obtain(req, installer)      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1077, in obtain        return installer(requirement)      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/dist.py", line 777, in fetch_build_egg        return fetch_build_egg(self, req)      File "/home/kai/python/env/djangoblog/lib/python3.6/site-packages/setuptools/installer.py", line 121, in fetch_build_egg        raise DistutilsError(str(e))    distutils.errors.DistutilsError: Command '['/home/kai/python/env/djangoblog/bin/python3', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmpobxct58l', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.    ----------------------------------------ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

解决办法: