Extern in .cpp file is a code smell, part 2.

fpdfsdk/src/fpdfview.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../core/include/fxcodec/fx_codec.h"
 #include "../../core/include/fxcrt/fx_safe_types.h"
 #include "../../public/fpdf_ext.h"
 #include "../../public/fpdf_progressive.h"
@@ skipping 43 matching lines @@
 
 FPDF_BOOL FSDK_IsSandBoxPolicyEnabled(FPDF_DWORD policy) {
   switch (policy) {
     case FPDF_POLICY_MACHINETIME_ACCESS:
       return (foxit_sandbox_policy & 0x01) ? TRUE : FALSE;
     default:
       return FALSE;
   }
 }
 
-#ifndef _T
-#define _T(x) x
-#endif
-
 CCodec_ModuleMgr* g_pCodecModule = nullptr;
 
 #if _FX_OS_ == _FX_LINUX_EMBEDDED_
 class CFontMapper : public IPDF_FontMapper {
  public:
   CFontMapper();
   ~CFontMapper() override;
 
   // IPDF_FontMapper
   FT_Face FindSubstFont(
@@ skipping 835 matching lines @@
   if (!buffer) {
     *buflen = len;
   } else if (*buflen >= len) {
     memcpy(buffer, utf16Name.c_str(), len);
     *buflen = len;
   } else {
     *buflen = -1;
   }
   return (FPDF_DEST)pDestObj;
 }