Add PrintThunk driver, it depends on PrintLib on top of MdePkg:

1. If the library instance is BasePrintLib, it has no prerequisite to produce EDK print protocol
2. If the library instance mapping is DxePrintLibPrint2Protocol, it acts as PrintOnPrint2Thunk.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7584 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/PrintThunk/PrintThunk.c

@@ -0,0 +1,68 @@
+/** @file
+  Module produces EDK gEfiPrintProtocolGuid for backward compatibility support.
+
+  EDK II retires old EDK Print Protocol and this module produces
+  gEfiPrintProtocolGuid based on PrintLib:
+  1) If it links against BasePrintLib in MdePkg, it produces gEfiPrintProtocolGuid
+     without any prerequisites.
+  2) If it links against DxePrintLibPrint2Protocol in MdeModulePkg, it produces
+     gEfiPrintProtocolGuid on top of gEfiPrint2ProtocolGuid.
+
+Copyright (c) 2009, Intel Corporation
+
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+Module Name:
+
+**/
+
+#include <PiDxe.h>
+
+#include <Protocol/Print.h>
+#include <Library/PrintLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DebugLib.h>
+
+EFI_HANDLE  mPrintThunkHandle = NULL;
+
+CONST EFI_PRINT_PROTOCOL mPrintProtocol = {
+  UnicodeVSPrint,
+};
+
+
+/**
+  The user Entry Point for Print thunk module.
+
+  This is the entry point for Print thunk DXE Driver. It installs the Print Protocol on
+  top of PrintLib class in MdePkg.
+
+  @param[in] ImageHandle    The firmware allocated handle for the EFI image.
+  @param[in] SystemTable    A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS       The entry point is executed successfully.
+  @retval Others            Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InitPrintThunk (
+  IN EFI_HANDLE           ImageHandle,
+  IN EFI_SYSTEM_TABLE     *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &mPrintThunkHandle,
+                  &gEfiPrintProtocolGuid, &mPrintProtocol,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}

EdkCompatibilityPkg/Compatibility/PrintThunk/PrintThunk.inf

@@ -0,0 +1,55 @@
+#/** @file
+# Module produces EDK gEfiPrintProtocolGuid for backward compatibility support.
+#
+# EDK II retires old EDK Print Protocol and this module produces
+# gEfiPrintProtocolGuid based on PrintLib:
+# 1) If it links against BasePrintLib in MdePkg, it produces gEfiPrintProtocolGuid
+#    without any prerequisites.
+# 2) If it links against DxePrintLibPrint2Protocol in MdeModulePkg, it produces
+#    gEfiPrintProtocolGuid on top of gEfiPrint2ProtocolGuid.
+#
+# Copyright (c) 2009, Intel Corporation
+#
+#  All rights reserved. This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PrintThunk
+  FILE_GUID                      = 3792FF94-8614-45ed-902B-1207BF1490A8
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+
+  ENTRY_POINT                    = InitPrintThunk
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  PrintThunk.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  EdkCompatibilityPkg/EdkCompatibilityPkg.dec
+
+[LibraryClasses]
+  UefiDriverEntryPoint
+  DebugLib
+  UefiBootServicesTableLib
+  PrintLib
+
+[Protocols]
+  gEfiPrintProtocolGuid      ## PRODUCES
+
+[Depex]
+  TRUE