Also looks like
https://github.com/MariaDB/mariadb-connector-c/blob/master/mariadb_config/libmariadb.pc.in needs to use INSTALL_LIBDIR (portable like MDEV-14340)
https://github.com/MariaDB/mariadb-connector-c/blob/master/mariadb_config/CMakeLists.txt#L55 installs to bin while it seems Debian is expecting a LIBDIR install (https://github.com/ottok/mariadb-10.3/blob/master/debian/mariadb_config) (no idea how portable this change will be).
Hi Sergei, can you take a look please? If any of the libs are not in a system lib path the path must be added to `--libs`
databases/mariadb102-client: "mysql_config --libs" lacks "-L/usr/local/lib"
How to define the system library path? Because CMAKE_SYSTEM_LIBRARY_PATH includes /usr/local/lib, so for cmake and everything that uses cmake libiconv.so is in the system library path.
In fact, mariadb_config strips all paths, not only "system library path", but if I fix it to strip only system paths, how to determine what path is "system"?
Hmmm... So how does CMake determine the `CMAKE_SYSTEM_LIBRARY_PATH`.
On FreeBSD, /usr/local/lib is not in the system library path, if I need that I always add it to the flags or linking will fail. This is exactly where currently some ports that depend on MariaDB libs are failing. I've hacked it into the port for now by patching mariadb_config.c
Yes, I've already seen your patch. I wondered why you did it that way, instead of a patch in files/.
Anyway, here's another thought. Command-line client mysql compiles just fine. Because it doesn't use -liconv but /usr/local/lib/libiconv.so. And then for mariadb_config cmake replaces all paths with -l.
So, perhaps there's no need to replace and mariadb_config should print exactly the line that was used for mysql command-line client? That line is known to work, because mysql was linked successfully.
Any reply to my last question? Agree? Disagree?
No reply for month might cause an issue to be closed as "Incomplete" (it's a manual process, so it won't necessarily close the issue, instead I might write a comment, like this one 
)