Statically linked galera library wrt. openssl

Adding galera component as well.

Static linking to openssl is not straightforward here, even after overcoming the scons issues with static libs, it still leaves it with unresolved openssl symbols.

There is another way here - the whole thing can be created statifically - libgalera_smm.a but it is not possible to load (dlopen) this as wsrep_provider. Another option here is to statically link it with mysqld itself, but that will require a few changes in wsrep_load as well (to avoid dlopen and use dlsym).

Creating the static library - libgalera_ssm.a is possible with few changes to SConscripts (I tried this) but again, need to follow up with latter if plausible.

Also, building without SSL fails, will raise a separate issue for it.

https://bugs.launchpad.net/galera/+bug/1243729 is the issue reported for SSL=0 issue.

13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:63: undefined reference to `CRYPTO_set_id_callback'
13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:64: undefined reference to `CRYPTO_set_locking_callback'
13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:65: undefined reference to `ERR_free_strings'
13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:66: undefined reference to `ERR_remove_state'
13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:67: undefined reference to `EVP_cleanup'
13:45:58 /home/jenkins/workspace/percona-xtradb-cluster-55-binary-static-openssl/label_exp/centos6-32/percona-xtradb-cluster-galera/asio/asio/ssl/detail/openssl_init.hpp:68: undefined reference to `CRYPTO_cleanup_all_ex_data'

is the issue currently.

It is to do with unresolved SSL symbols.

It is not possible to build without ssl either due to lp:1243729.

For now, the Galera libgalera_smm.so will be built without ssl (now that lp:1243729 is fixed) and distributed with staticially built mysqld.

#7 won't be required since it is now possible to build with ssl. Fixed build-binary.sh accordingly.

Note, for others building it:

This requires fPIC enabled zlib and openssl static libraries.

build-binary.sh is run like:

bash -x ./build/build-binary.sh --with-ssl="${openssl_prefix}" --tag="-static-openssl-${openssl_ver}" --with-jemalloc=jemalloc/ ./target

where openssl_prefix is where the openssl and zlib libraries are installed.

build_binary.sh has also been modified for the build mentioned in #9.

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXC-1467