This has been fixed:

Usage: scripts/mysql_config [OPTIONS]

Options:

        --cflags         [-I/usr/local/mysql/include/mysql -I/usr/local/mysql/include/mysql/.. ]

        --include        [-I/usr/local/mysql/include/mysql -I/usr/local/mysql/include/mysql/..]

        --libs           [-L/usr/local/mysql/lib  -lmariadb -lpthread -lz -ldl -lm -lssl -lcrypto]

        --libs_r         [-L/usr/local/mysql/lib  -lmariadb -lpthread -lz -ldl -lm -lssl -lcrypto]

        --plugindir      [/usr/local/mysql/lib/plugin]

        --socket         [/tmp/mysql.sock]

        --port           [0]

        --version        [10.2.34]

        --libmysqld-libs [-L/usr/local/mysql/lib  -lmysqld]

        --variable=VAR   VAR is one of:

                pkgincludedir [/usr/local/mysql/include/mysql]

                pkglibdir     [/usr/local/mysql/lib]

                plugindir     [/usr/local/mysql/lib/plugin]

Able to see the lz in mysql_config but not in the mariadb-10.2.35-linux-x86_64.tar.gz

https://downloads.mariadb.org/interstitial/mariadb-10.2.35/bintar-linux-x86_64/mariadb-10.2.35-linux-x86_64.tar.gz

[root@t bin]# grep zlib mysql_config
libs="-L$pkglibdir -lmariadb -lpthread -lzlib -ldl -lm -lgnutls"

Hi Daniel, Do we have any update on this ticket?
And Is this planned for any release?

I'm on leave until next week. As a critical bug it will be fixed before next release (end of month approximately)

Could someone provide any update on this?

Haven't looked yet however its on critical priority for the next release at the end of the month.

This is not a Connector/C issue, mysql_config is a script from the server tree, in scripts/

not fixed in the latest (as of now) mariadb-10.2.38-linux-x86_64.tar.gz from buildbot

Hi RagulR! I'm trying to investigate this and I can't figure out whether mysql_config was wrong to suggest you `-lzlib` and it should've instead suggested `-lz`, or it shouldn't suggest `-lzlib` at all. Is it possible to remove the `-lzlib` flag by hand in whatever you are compiling and see if the error goes away?

Thanks for the investigation, Robert.
Yes, I currently overriding the flag '-lzlib' as '-lz' to unblock my installation.

But I could see the zlib need to be accessed as -lz instead of '-lzlib'

[root@~]# pkg-config zlib --libs

-lz

Good that you unblocked your installation! So ideally mysql_config/mariadb_config should output `-lzlib` only when running the script from within a build-from-sources mariadb server (and that server is built with -DWITH_ZLIB=bundled) and in that case it is correct, because the bundled version of zlib results in a static library called 'libzlib.a'.
But for binary tarballs it should never happen, mysql_config should call mariadb_config behind the scenes and that should only return '-lmariadb' (in theory) as linking flag starting with 10.2 (for sure it should never return '-lzlib' because we don't even ship any libzlib.a in our tarballs).

I would appreciate a lot if you could help me understand why mysql_config behaves that way for you.
I need to know some internal values from within the script, you can obtain them by going into the script and add something like this before the script exits:
> echo "########"
> echo $basedir
> ls -l $basedir/bin/
> echo $me

Let me know if you need help with that.

Also RagulR, I would appreciate a lot if you could try your installation without any '-lz' or '-lzlib' at all.

Fixed with b082716892071fdc3c961e9afaa011e0f6beb102