I don't know how many times I've encountered this but by blogging about it, hopefully, next time it'll help me, and you!, find this sooner.
If you get this:
clang -bundle -undefined dynamic_lookup -L/usr/local/opt/readline/lib -L/usr/local/opt/readline/lib -L/Users/peterbe/.pyenv/versions/3.8.0/lib -L/opt/boxen/homebrew/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/readline/lib -L/Users/peterbe/.pyenv/versions/3.8.0/lib -L/opt/boxen/homebrew/lib -L/opt/boxen/homebrew/lib -I/opt/boxen/homebrew/include build/temp.macosx-10.14-x86_64-3.8/MySQLdb/_mysql.o -L/usr/local/Cellar/mysql/8.0.18_1/lib -lmysqlclient -lssl -lcrypto -o build/lib.macosx-10.14-x86_64-3.8/MySQLdb/_mysql.cpython-38-darwin.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
(The most important line is the ld: library not found for -lssl)
On most macOS systems, when trying to install a Python package that requires a binary compile step based on the system openssl (which I think comes from the OS), you'll get this.
The solution is simple, run this first:
export LDFLAGS="-L/usr/local/opt/openssl/lib"
export CPPFLAGS="-I/usr/local/opt/openssl/include"
Depending on your install of things, you might need to adjust this accordingly. For me, I have:
▶ ls -l /usr/local/opt/openssl/
total 1272
-rw-r--r-- 1 peterbe staff 717 Sep 10 09:13 AUTHORS
-rw-r--r-- 1 peterbe staff 582924 Dec 19 11:32 CHANGES
-rw-r--r-- 1 peterbe staff 743 Dec 19 11:32 INSTALL_RECEIPT.json
-rw-r--r-- 1 peterbe staff 6121 Sep 10 09:13 LICENSE
-rw-r--r-- 1 peterbe staff 42183 Sep 10 09:13 NEWS
-rw-r--r-- 1 peterbe staff 3158 Sep 10 09:13 README
drwxr-xr-x 4 peterbe staff 128 Dec 19 11:32 bin
drwxr-xr-x 3 peterbe staff 96 Sep 10 09:13 include
drwxr-xr-x 10 peterbe staff 320 Sep 10 09:13 lib
drwxr-xr-x 4 peterbe staff 128 Sep 10 09:13 share
Now, with those things set you should hopefully be able to do things like:
pip install mysqlclient
Comments
Thank you!