Comment 1 for bug 1287374

This (different location for .a vs .so) is easy to confirm on 5.5:

[openxs@chief tmp]$ rpm2cpio Percona-Server-devel-55-5.5.32-rel31.0.549.rhel6.x86_64.rpm | cpio -t | grep libmysql
14884 blocks
./usr/lib64/libmysqlclient.so
./usr/lib64/libmysqlclient_r.so
./usr/lib64/mysql/libmysqlclient.a
./usr/lib64/mysql/libmysqlclient_r.a
./usr/lib64/mysql/libmysqlservices.a