Error installing mysql-python: library not found for -lssl

问题

I\'m having trouble installing mysql-python. Created a new virtualenv and when installing mysql-python... here\'s the error message:

(env)$ pip install mysql-python
Collecting mysql-python
...

clang -bundle -undefined dynamic_lookup -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk build/temp.macosx-10.12-x86_64-2.7/_mysql.o -L/usr /local/Cellar/mysql/5.7.16/lib -lmysqlclient -lssl -lcrypto -o build/lib.macosx-10.12-x86_64-2.7/_mysql.so
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command \'clang\' failed with exit status 1

Using homebrew, I have installed:

libressl
openssl
openssl@1.1
mysql

Already tried to brew link but brew refuses to do so.

The OS is MacOS Sierra.

Can anyone help? Thanks!

回答1:

You can set ssl library path explicitly.

LDFLAGS=-L/usr/local/opt/openssl/lib pip install mysqlclient

回答2:

Solved it with these steps:

brew uninstall mysql
brew install mysql-connector-c
pip install mysql-python
brew unlink mysql-connector-c
brew install mysql

Found the answer here https://stackoverflow.com/a/25920020/576192

Not sure if this is the right way, but this is how I managed to solve it.

回答3:

I tried updating Xcode's CLT, uninstalling mysql, checking mysql_config, etc., but had no luck.

I found that running brew info openssl shows:

...

For compilers to find openssl you may need to set:
  export LDFLAGS="-L/usr/local/opt/openssl/lib"
  export CPPFLAGS="-I/usr/local/opt/openssl/include"

...

Running those two commands, followed by pip install worked for me (in my case when installing mysqlclient).

回答4:

I was finally able to fix it by

xcode-select --install

I was sure I had already done that... but obviously I hadn't. Definitely worth a shot!

回答5:

I'm able to fix the error by running:

pip install -r requirements.txt --global-option=build_ext --global-option="-I/usr/local/opt/openssl/include" --global-option="-L/usr/local/opt/openssl/lib"

回答6:

Worked for me by doing this

$ brew uninstall mysql
$ brew install mysql-connector-c
$ brew unlink mysql-connector-c
$ brew install mysql
$ pip install mysql-python

Which is a slightly altered version of the recipe above (note: pip install at the end!)

回答7:

If you want to install mysql-python, I suggest you to install mysqlclient instead. The authors of these two modules are the same. By far, the authors all turn to keep maintaining mysqlclient. mysqlclient supports both Python 2 and Python 3. And you can use the same codes like mysql-python. Blew is my installation solution for you.

$ brew info openssl
$ brew unlink mysql-connector-c
$ brew install mysql
$ brew link --overwrite mysql-connector-c
$ pip install mysqlclient

If there is an error before pip install mysqlclient. Please fix it according to methane's answer. And run pip install mysqlclient again.

回答8:

Or download and install .dmg from the MySQL dev site: https://dev.mysql.com/downloads/file/?id=467834

回答9:

For those of you who are installing MySQL v5.7 with Brew

Uninstall mysql-connector-c

$ brew uninstall mysql-connector-c

Install specific version, very likely you need to uninstall other installed versions

$ brew install mysql@5.7

You will need to add it to the PATH, since this is 'keg-only' formulae, this is printed after it is installed

$ echo 'export PATH="/usr/local/opt/mysql@5.7/bin:$PATH"' >> ~/.zshrc

Replace ~/.zshrc with the appropriate file.

Install mysql-connector-c

$ brew install mysql-connector-c

Check it is installed properly

$ which mysql
# /usr/local/opt/mysql@5.7/bin/mysql

$ mysql_config
# Usage: /usr/local/opt/mysql@5.7/bin/mysql_config [OPTIONS]
Compiler: Clang 10.0.0.10001145
Options:
        --cflags         [-I/usr/local/opt/mysql@5.7/include/mysql ]
        --cxxflags       [-I/usr/local/opt/mysql@5.7/include/mysql ]
        --include        [-I/usr/local/opt/mysql@5.7/include/mysql]
        --libs           [-L/usr/local/opt/mysql@5.7/lib -lmysqlclient -lssl -lcrypto]
        --libs_r         [-L/usr/local/opt/mysql@5.7/lib -lmysqlclient -lssl -lcrypto]
        --plugindir      [/usr/local/opt/mysql@5.7/lib/plugin]
        --socket         [/tmp/mysql.sock]
        --port           [0]
        --version        [5.7.24]
        --libmysqld-libs [-L/usr/local/opt/mysql@5.7/lib -lmysqld -lssl -lcrypto]
        --variable=VAR   VAR is one of:
                pkgincludedir [/usr/local/opt/mysql@5.7/include/mysql]
                pkglibdir     [/usr/local/opt/mysql@5.7/lib]
                plugindir     [/usr/local/opt/mysql@5.7/lib/plugin]

Now install mysqlclient

$ pip install mysqlclient

来源：https://stackoverflow.com/questions/40587558/error-installing-mysql-python-library-not-found-for-lssl

标签

pip

virtualenv

homebrew

mysql-python