mysqlclient install error - ld: library not found for -lzlib

Question

I'm trying to install mysqlclient on MacOS from requirements.txt of a Python(3.8) project. I created a virtual environment and this is the output while trying to install it:

ld: library not found for -lzlib  
clang: error: linker command failed with exit code 1 (use -v to see invocation)  
error: command '/usr/bin/gcc' failed with exit code 1  
[end of output]

Note that lzlib is already installed. I read that MacOS has clang for compilation of C libraries and I installed gcc using Homebrew. Still the default clang was being picked up as is evident from the following output:

$ gcc -v  
Apple clang version 14.0.3 (clang-1403.0.22.14.1)  
Target: x86_64-apple-darwin22.4.0  
Thread model: posix  
InstalledDir: /Library/Developer/CommandLineTools/usr/bin 



$ gcc-13 -v  
Using built-in specs.  
COLLECT_GCC=gcc-13  
COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/13.1.0/bin/../libexec/gcc/x86_64-apple-darwin22/13/lto-wrapper  
Target: x86_64-apple-darwin22  
Configured with: ../configure --prefix=/usr/local/opt/gcc --libdir=/usr/local/opt/gcc/lib/gcc/current --disable-nls --enable-checking=release --with-gcc-major-version-only --enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-13 --with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr --with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl --with-zstd=/usr/local/opt/zstd --with-pkgversion='Homebrew GCC 13.1.0' --with-bugurl=https://github.com/Homebrew/homebrew-core/issues --with-system-zlib --build=x86_64-apple-darwin22 --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk  
Thread model: posix  
Supported LTO compression algorithms: zlib zstd  
gcc version 13.1.0 (Homebrew GCC 13.1.0)

So, I tried to set the alias for gcc in my .zshrc which showed correct output in terminal but the command to install mysqlclient still fails with same error message. I tried to install multiple packages as suggested in different answers but still the error is same.

Eden · Accepted Answer · 2023-05-20 21:20:21Z

2

Run brew info zlib to get the path to your zlib.

Likely: "-L/opt/homebrew/opt/zlib/lib"

Open your mysql config file in any editor, example:

> sudo vim /opt/homebrew/opt/mysql-client/bin/mysql_config

In this file you'll find the libraries. I updated zlib to be the direct library

before:

# Create options
libs="-L$pkglibdir"
libs="$libs -lmysqlclient -lzlib  -lzstd -L/opt/homebrew/opt/[email protected]/lib -lssl -lcrypto -lresolv"

After

# Create options
libs="-L$pkglibdir"
libs="$libs -lmysqlclient -L/opt/homebrew/opt/zlib/lib  -lzstd -L/opt/homebrew/opt/[email protected]/lib -lssl -lcrypto -lresolv"

Don't know if it's the most elegant solution but this workaround got me to install mysql_client

answered May 20, 2023 at 21:20

Eden

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user16226930 · Accepted Answer · 2023-11-13 20:02:26Z

0

This should be fixed in homebrew with https://github.com/Homebrew/homebrew-core/pull/131207

answered Nov 13, 2023 at 20:02

user16226930

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