Windows : Fix server compile errors when compile with /Zc:strictStrings option

client/mysqlbinlog.cc

@@ -106,7 +106,7 @@ static const char* sock= 0;
 static char *opt_plugindir= 0, *opt_default_auth= 0;
 
 #ifdef HAVE_SMEM
-static char *shared_memory_base_name= 0;
+static const char *shared_memory_base_name= 0;
 #endif
 static char* user = 0;
 static char* pass = 0;

include/my_global.h

@@ -1078,10 +1078,9 @@ typedef ulong		myf;	/* Type of MyFlags in my_funcs */
 static inline char *dlerror(void)
 {
   static char win_errormsg[2048];
-  if(FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
-                   0, GetLastError(), 0, win_errormsg, 2048, NULL))
-    return win_errormsg;
-  return "";
+  FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
+    0, GetLastError(), 0, win_errormsg, 2048, NULL);
+  return win_errormsg;
 }
 #define HAVE_DLOPEN 1
 #define HAVE_DLERROR 1

sql/mysql_install_db.cc

@@ -386,8 +386,8 @@ static int register_service()
     CloseServiceHandle(sc_manager);
     die("CreateService failed (%u)", GetLastError());
   }
-
-  SERVICE_DESCRIPTION sd= { "MariaDB database server" };
+  char description[] = "MariaDB database server";
+  SERVICE_DESCRIPTION sd= { description };
   ChangeServiceConfig2(sc_service, SERVICE_CONFIG_DESCRIPTION, &sd);
   CloseServiceHandle(sc_service); 
   CloseServiceHandle(sc_manager);

sql/mysqld.cc

@@ -1414,7 +1414,7 @@ ulong query_cache_min_res_unit= QUERY_CACHE_MIN_RESULT_DATA_SIZE;
 Query_cache query_cache;
 #endif
 #ifdef HAVE_SMEM
-char *shared_memory_base_name= default_shared_memory_base_name;
+const char *shared_memory_base_name= default_shared_memory_base_name;
 my_bool opt_enable_shared_memory;
 HANDLE smem_event_connect_request= 0;
 #endif

sql/mysqld.h

@@ -118,7 +118,8 @@ extern my_bool sp_automatic_privileges, opt_noacl;
 extern ulong use_stat_tables;
 extern my_bool opt_old_style_user_limits, trust_function_creators;
 extern uint opt_crash_binlog_innodb;
-extern char *shared_memory_base_name, *mysqld_unix_port;
+extern const char *shared_memory_base_name;
+extern char *mysqld_unix_port;
 extern my_bool opt_enable_shared_memory;
 extern ulong opt_replicate_events_marked_for_skip;
 extern char *default_tz_name;

sql/nt_servc.cc

@@ -508,7 +508,7 @@ BOOL NTService::IsService(LPCSTR ServiceName)
 }
 /* ------------------------------------------------------------------------
  -------------------------------------------------------------------------- */
-BOOL NTService::got_service_option(char **argv, char *service_option)
+BOOL NTService::got_service_option(char **argv, const char *service_option)
 {
   char *option;
   for (option= argv[1]; *option; option++)

sql/nt_servc.h

@@ -61,7 +61,7 @@ class NTService
     BOOL SeekStatus(LPCSTR szInternName, int OperationType);
     BOOL Remove(LPCSTR szInternName);
     BOOL IsService(LPCSTR ServiceName);
-    BOOL got_service_option(char **argv, char *service_option);
+    BOOL got_service_option(char **argv, const char *service_option);
     BOOL is_super_user();
 
     /*