[debian-mysql] Linking libxxx.so to libxxx_r.so? dpkg-shlibdep doesn't like it...

[Christian Hammers]

Hello

To help packages like Apache which have some parts like libaprutil
that wants to link against libmysqlclient16_r.so and some like PHP
that wants to link against libmysqlcient.so, it was proposed that
libmysqlclient.so should be made a symlink pointing to the thread safe
*_r.so version.

(This change would be introduced for the upcoming new soname version 
which is not yet into unstable! Performance issues were considered to
be negligible as the client library only copies data from and to the
server)

But when putting a corresponding symlink into
debian/libmysqlclient16.links, the build process fails with:

dh_shlibdeps -a -l debian/libmysqlclient16/usr/lib -L libmysqlclient16
        LD_LIBRARY_PATH=/usr/lib/libfakeroot:/usr/lib64/libfakeroot:/usr/lib32/libfakeroot:/debian/libmysqlclient16/usr/lib
        dpkg-shlibdeps -Tdebian/libmysqlclient16.substvars -Sdebian/libmysqlclient16 debian/libmysqlclient16/usr/lib/libmysqlclient_r.so.16.0.0
dpkg-shlibdeps: warning: dependency on libnsl.so.1 could be avoided if "debian/libmysqlclient16/usr/lib/libmysqlclient_r.so.16.0.0" were not uselessly linked against it (they use none of its symbols).
dpkg-shlibdeps: warning: dependency on libcrypt.so.1 could be avoided if "debian/libmysqlclient16/usr/lib/libmysqlclient_r.so.16.0.0" were not uselessly linked against it (they use none of its symbols).
        LD_LIBRARY_PATH=/usr/lib/libfakeroot:/usr/lib64/libfakeroot:/usr/lib32/libfakeroot:/debian/libmysqlclient16/usr/lib
        dpkg-shlibdeps -Tdebian/mysql-client-5.1.substvars -Sdebian/libmysqlclient16 debian/mysql-client-5.1/usr/sbin/mysqlmanager debian/mysql-client-5.1/usr/bin/mysqldump debian/mysql-client-5.1/usr/bin/mysql_client_test_embedded debian/mysql-client-5.1/usr/bin/mysql_waitpid debian/mysql-client-5.1/usr/bin/mysqladmin debian/mysql-client-5.1/usr/bin/mysqltest_embedded debian/mysql-client-5.1/usr/bin/mysql debian/mysql-client-5.1/usr/bin/mysqlshow debian/mysql-client-5.1/usr/bin/mysqlcheck debian/mysql-client-5.1/usr/bin/myisam_ftdump debian/mysql-client-5.1/usr/bin/mysqlimport debian/mysql-client-5.1/usr/bin/mysql_client_test
dpkg-shlibdeps: warning: debian/libmysqlclient16/usr/lib/libmysqlclient.so.16 has an unexpected SONAME (libmysqlclient_r.so.16)
dpkg-shlibdeps: error: no dependency information found for debian/libmysqlclient16/usr/lib/libmysqlclient.so.16 (used by debian/mysql-client-5.1/usr/bin/mysqldump).
dh_shlibdeps: dpkg-shlibdeps returned exit code 2
make: *** [binary-arch] Error 1

Before I start looking for a creative workaround - is this approach a good idea
in the first place?

Does someone now if binaries build against the shared library on a different
Linux distribution would run on Debian then?

thanks,

-christian-