Bug#48351 Inconsistent library names for semisync plugin

The semisync plugin library names on Unix like systems were prefixed with
'lib', which did not follow the conventions.

Fix the problem by removing the 'lib' prefix on Unix systems.

mysql-test/mysql-test-run.pl

@@ -1828,8 +1828,8 @@ sub environment_setup {
     }
     else
     {
-       $semisync_master_filename = "libsemisync_master.so";
-       $semisync_slave_filename = "libsemisync_slave.so";
+       $semisync_master_filename = "semisync_master.so";
+       $semisync_slave_filename = "semisync_slave.so";
     }
     my $lib_semisync_master_plugin=
       mtr_file_exists(vs_config_dirs('plugin/semisync',$semisync_master_filename),

plugin/semisync/Makefile.am

@@ -23,16 +23,16 @@ INCLUDES =              -I$(top_srcdir)/include \
 
 noinst_HEADERS = semisync.h semisync_master.h semisync_slave.h
 
-pkgplugin_LTLIBRARIES =	libsemisync_master.la libsemisync_slave.la
+pkgplugin_LTLIBRARIES =	semisync_master.la semisync_slave.la
 
-libsemisync_master_la_LDFLAGS =	-module
-libsemisync_master_la_CXXFLAGS=	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
-libsemisync_master_la_CFLAGS =	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
-libsemisync_master_la_SOURCES = semisync.cc semisync_master.cc semisync_master_plugin.cc
+semisync_master_la_LDFLAGS =	-module
+semisync_master_la_CXXFLAGS=	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
+semisync_master_la_CFLAGS =	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
+semisync_master_la_SOURCES = semisync.cc semisync_master.cc semisync_master_plugin.cc
 
-libsemisync_slave_la_LDFLAGS =	-module
-libsemisync_slave_la_CXXFLAGS=	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
-libsemisync_slave_la_CFLAGS =	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
-libsemisync_slave_la_SOURCES = semisync.cc semisync_slave.cc semisync_slave_plugin.cc
+semisync_slave_la_LDFLAGS =	-module
+semisync_slave_la_CXXFLAGS=	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
+semisync_slave_la_CFLAGS =	$(AM_CFLAGS) -DMYSQL_DYNAMIC_PLUGIN
+semisync_slave_la_SOURCES = semisync.cc semisync_slave.cc semisync_slave_plugin.cc
 
 EXTRA_DIST=		CMakeLists.txt plug.in

plugin/semisync/plug.in

 MYSQL_PLUGIN(semisync,[Semi-synchronous Replication Plugin],
         [Semi-synchronous replication plugin.])
-MYSQL_PLUGIN_DYNAMIC(semisync,   [libsemisync_master.la libsemisync_slave.la])
+MYSQL_PLUGIN_DYNAMIC(semisync,   [semisync_master.la semisync_slave.la])