pip install mysqlclient fails with "call to undeclared function" error

Question

I am currently on macOS 14.3 on Apple silicon. I am trying to install mysqlclient using pip. I already have mysql package installed using brew install mysql pkg-config but my mysqlclient installation is failing due to the errors mentioned below:

I am trying to run pip install mysqlclient

I am getting the following error:

  building 'MySQLdb._mysql' extension
      creating build/temp.macosx-14.1-arm64-cpython-311
      creating build/temp.macosx-14.1-arm64-cpython-311/src
      creating build/temp.macosx-14.1-arm64-cpython-311/src/MySQLdb
      clang -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/opt/homebrew/opt/mysql-client/include "-Dversion_info=(2, 2, 1, 'final', 0)" -D__version__=2.2.1 -I/Users/avishekde/.pyenv/versions/3.11.6/include/python3.11 -c src/MySQLdb/_mysql.c -o build/temp.macosx-14.1-arm64-cpython-311/src/MySQLdb/_mysql.o -I/opt/homebrew/Cellar/mysql-client/8.3.0/include/mysql -std=c99
      src/MySQLdb/_mysql.c:527:9: error: call to undeclared function 'mysql_ssl_set'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
              mysql_ssl_set(&(self->connection), key, cert, ca, capath, cipher);
              ^
      src/MySQLdb/_mysql.c:527:9: note: did you mean 'mysql_close'?
      /opt/homebrew/Cellar/mysql-client/8.3.0/include/mysql/mysql.h:797:14: note: 'mysql_close' declared here
      void STDCALL mysql_close(MYSQL *sock);
                   ^
      src/MySQLdb/_mysql.c:1795:9: error: call to undeclared function 'mysql_kill'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          r = mysql_kill(&(self->connection), pid);
              ^
      src/MySQLdb/_mysql.c:1795:9: note: did you mean 'mysql_ping'?
      /opt/homebrew/Cellar/mysql-client/8.3.0/include/mysql/mysql.h:525:13: note: 'mysql_ping' declared here
      int STDCALL mysql_ping(MYSQL *mysql);
                  ^
      src/MySQLdb/_mysql.c:2011:9: error: call to undeclared function 'mysql_shutdown'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          r = mysql_shutdown(&(self->connection), SHUTDOWN_DEFAULT);
              ^
      3 errors generated.
      error: command '/usr/bin/clang' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for mysqlclient
Failed to build mysqlclient
ERROR: Could not build wheels for mysqlclient, which is required to install pyproject.toml-based projects

The following is the output from pkg-config --cflags --libs mysqlclient

-I/opt/homebrew/Cellar/mysql-client/8.3.0/include/mysql -L/opt/homebrew/Cellar/mysql-client/8.3.0/lib -lmysqlclient

Answer 1

You can download the source code,and make some modifications, then build & install. Here are the details: https://github.com/PyMySQL/mysqlclient/issues/688