core/ difference with XFA (for information only).

core/src/fpdftext/text_int.h

Index: core/src/fpdftext/text_int.h
diff --git a/core/src/fpdftext/text_int.h b/core/src/fpdftext/text_int.h
index a7f3aaec7d511a7cd219526afea2dc7a461af68d..d8e79b961014e917759d77bf3f3ff4c74bc5023f 100644
--- a/core/src/fpdftext/text_int.h
+++ b/core/src/fpdftext/text_int.h
@@ -125,10 +125,12 @@ class CPDF_TextPage : public IPDF_TextPage {
   void AddCharInfoByRLDirection(CFX_WideString& str, int i);
   int32_t GetTextObjectWritingMode(const CPDF_TextObject* pTextObj);
   int32_t FindTextlineFlowDirection();
+#ifndef PDF_ENABLE_XFA
   void SwapTempTextBuf(int32_t iCharListStartAppend, int32_t iBufStartAppend);
   FX_BOOL IsRightToLeft(const CPDF_TextObject* pTextObj,
                         const CPDF_Font* pFont,
                         int nItems) const;
+#endif
 
   CPDFText_ParseOptions m_ParseOptions;
   CFX_WordArray m_CharIndex;