Matching libmariadb-dev package contents in official Debian repositories,
the MariaDB Connector/C files should go into a folder using the 'mariadb'
name. For compatibility with sources that expect to find 'mysql' stuff,
create a symlink from include/mysql to include/mariadb.
Using this package any source that expects MySQL Client libraries should
build without changes. Sources that expect MariaDB Connector C should
build using only libmariadb-dev.
Current MariaDB Connector/C does not build quite identically in
this source tree compared to how it build in Debian official.
The remaining differences are tracked in MDEV-14921.
The libmariadb-dev package must include this directory so that downstream
developers can intentionally include MariaDB libraries as they want.
This matches the contents of the official Debian libmariadb-dev package.
The symlink
/usr/lib/libmysqlclient.so -> /usr/lib/libmysqlclient.so.18
was invalid, because the library was not in /usr/lib.
The correct symlink is
/usr/lib/x86_64-linux-gnu/libmysqlclient.so -> /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
The new library name libmariadb3 matches the libmariadb.so.3 filename.
Packages that want to build against MariaDB Connector C have as
build-dependency libmariadb-dev and as run-time dependency libmariadb3.
Make the package provide libmariadbclient18 for backwards compatibility,
though compatibility is not always assured. There library did change
to a whole new generation after all, even though ABI compatibility has
been a design goal.
Also do the equivalent change for the -dev package. Packages that
explicitly want to use the MariaDB Connector C should mark it as
their build-depends.
Also provide an empty libmariadbclient18 metapackage to facilitate
upgrades from old MariaDB installs, just like there is an empty
libmysqlclient18 package. Create more of these in the future as needed.
