Windows - Fix CMAKE_INTERPROCEDURAL_OPTIMIZATION build with MSVC

If IPO is enabled, MSVC compiles with /GL  which is not
compatible with cmake's WINDOWS_EXPORT_ALL_SYMBOLS.

Since server.dll can't autoexport symbols from /GL compiled objects,
IPO must be disabled for dbug, string,mysys, and sql targets (in case we
build "plugin" DLLs that need server.dll's symbols)

cmake/libutils.cmake

@@ -368,7 +368,12 @@ ENDFUNCTION()
 # for some static libraries.
 
 FUNCTION (MAYBE_DISABLE_IPO target)
-  IF(MSVC AND NOT CLANG_CL)
-    SET_TARGET_PROPERTIES(${target} PROPERTIES INTERPROCEDURAL_OPTIMIZATION OFF)
+  IF(MSVC AND (NOT CLANG_CL) AND (NOT WITHOUT_DYNAMIC_PLUGINS))
+    SET_TARGET_PROPERTIES(${target} PROPERTIES
+      INTERPROCEDURAL_OPTIMIZATION OFF
+      INTERPROCEDURAL_OPTIMIZATION_DEBUG OFF
+      INTERPROCEDURAL_OPTIMIZATION_RELEASE OFF
+      INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO OFF
+      INTERPROCEDURAL_OPTIMIZATION_MINSIZEREL OFF)
   ENDIF()
 ENDFUNCTION()

sql/CMakeLists.txt

@@ -187,7 +187,7 @@ IF ((CMAKE_SYSTEM_NAME MATCHES "Linux" OR
 ENDIF()
 
 IF(WIN32)
-  SET(SQL_SOURCE ${SQL_SOURCE} handle_connections_win.cc)
+  SET(SQL_SOURCE ${SQL_SOURCE} handle_connections_win.cc winmain.cc)
 ENDIF()
 
 MYSQL_ADD_PLUGIN(partition ha_partition.cc STORAGE_ENGINE DEFAULT STATIC_ONLY
@@ -217,7 +217,7 @@ FOREACH(se aria partition perfschema sql_sequence wsrep)
 ENDFOREACH()
 
 IF(WIN32)
-  SET(MYSQLD_SOURCE winmain.cc  message.rc)
+  SET(MYSQLD_SOURCE main.cc  message.rc)
 ELSE()
   SET(MYSQLD_SOURCE main.cc ${DTRACE_PROBES_ALL})
 ENDIF()
@@ -259,7 +259,9 @@ IF(MSVC OR CMAKE_SYSTEM_NAME MATCHES AIX)
    sql_builtins
   )
   IF(MSVC)
-    SET_TARGET_PROPERTIES(server PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
+    IF(NOT WITHOUT_DYNAMIC_PLUGINS)
+     SET_TARGET_PROPERTIES(server PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
+    ENDIF()
   ELSE()
     SET_TARGET_PROPERTIES(server PROPERTIES AIX_EXPORT_ALL_SYMBOLS TRUE)
   ENDIF()

sql/main.cc

@@ -17,10 +17,20 @@
 /* 
   main() for mysqld.
   Calls mysqld_main() entry point exported by sql library.
+  On Windows, might do some service handling.
 */
+#ifdef _WIN32
+/* Windows main function, service handling, calls mysqld_main */
+extern int mysqld_win_main(int argc, char **argv);
+#else
 extern int mysqld_main(int argc, char **argv);
+#endif
 
 int main(int argc, char **argv)
 {
+#ifdef _WIN32
+  return mysqld_win_main(argc, argv);
+#else
   return mysqld_main(argc, argv);
+#endif
 }

sql/winmain.cc

@@ -60,8 +60,8 @@ static SERVICE_STATUS svc_status{SERVICE_WIN32_OWN_PROCESS};
 static SERVICE_STATUS_HANDLE svc_status_handle;
 static char *svc_name;
 
-static char **orig_argv;
-static int orig_argc;
+static char **save_argv;
+static int save_argc;
 
 static int install_service(int argc, char **argv, const char *name);
 static int remove_service(const char *name);
@@ -165,8 +165,8 @@ static void WINAPI svc_main(DWORD svc_argc, char **svc_argv)
    Do not pass the service name parameter (last on the command line)
    to mysqld_main(), it is unaware of it.
   */
-  orig_argv[orig_argc - 1]= 0;
-  mysqld_main(orig_argc - 1, orig_argv);
+  save_argv[save_argc - 1]= 0;
+  mysqld_main(save_argc - 1, save_argv);
 }
 
 /*
@@ -224,10 +224,10 @@ static const char *get_svc_name(const char *arg)
 
   Plus, the obsolete functionality to register/remove services.
 */
-int main(int argc, char **argv)
+__declspec(dllexport) int mysqld_win_main(int argc, char **argv)
 {
-  orig_argv= argv;
-  orig_argc= argc;
+  save_argv= argv;
+  save_argc= argc;
 
    /*
      If no special arguments are given, service name is nor present