TODO-4256 : Set Galera library as submodule for MariaDB server

.gitmodules

@@ -11,3 +11,7 @@
 [submodule "extra/wolfssl/wolfssl"]
 	path = extra/wolfssl/wolfssl
 	url = https://github.com/wolfSSL/wolfssl.git
+[submodule "plugin/galera_replication/galera"]
+	path = plugin/galera_replication/galera
+	url = [email protected]:MariaDB/galera.git
+	branch = mariadb-4.x

mysql-test/mysql-test-run.pl

@@ -2498,6 +2498,7 @@ ()
 
         for (<$bindir/storage/*$multiconfig/*.so>,
              <$bindir/plugin/*$multiconfig/*.so>,
+	     <$bindir/plugin/galera_replication/galera/*.so>,
              <$bindir/libmariadb/plugins/*/*.so>,
              <$bindir/libmariadb/$multiconfig/*.so>,
              <$bindir/sql$multiconfig/*.so>)

mysql-test/suite/wsrep/common.pm

@@ -89,7 +89,9 @@ sub check_wsrep_support() {
     # WSREP_PROVIDER env not defined. Lets try to locate the wsrep provider
     # library.
     $file_wsrep_provider=
-      ::mtr_file_exists("/usr/lib64/galera-4/libgalera_smm.so",
+	::mtr_file_exists("$basedir/lib/plugin/libgalera_smm.so",
+                      "$::bindir/plugin/galera_replication/galera/libgalera_smm.so",
+                      "/usr/lib64/galera-4/libgalera_smm.so",
                       "/usr/lib64/galera/libgalera_smm.so",
                       "/usr/lib/galera-4/libgalera_smm.so",
                       "/usr/lib/galera/libgalera_smm.so");

plugin/galera_replication/CMakeLists.txt

@@ -0,0 +1,50 @@
+# Copyright (C) 2023 Codership Oy <[email protected]>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0,
+# as published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an additional
+# permission to link the program and your derivative works with the
+# separately licensed software that they have included with MySQL.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+OPTION(WITH_WSREP "Build Galera library" OFF)
+
+MESSAGE(STATUS "Building with Galera ${WITH_WSREP}")
+
+IF(NOT WITH_WSREP)
+  RETURN()
+ENDIF()
+
+IF (WITH_WSREP)
+
+  IF(NOT EXISTS "${CMAKE_SOURCE_DIR}/plugin/galera_replication/galera/GALERA_VERSION")
+    MESSAGE(FATAL_ERROR "No MariaDB galera library code! Run
+    ${GIT_EXECUTABLE} submodule update --init --recursive
+Then restart the build.
+")
+  ENDIF()
+
+  ADD_SUBDIRECTORY(galera)
+
+  INSTALL(FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/galera/libgalera_smm.so"
+    DESTINATION ${INSTALL_PLUGINDIR}
+    COMPONENT Server)
+  INSTALL(PROGRAMS
+    "${CMAKE_CURRENT_BINARY_DIR}/galera/garb/garbd"
+    DESTINATION ${INSTALL_BINDIR}
+    COMPONENT Server)
+ENDIF()