diff --git a/cmake/installer/TextLog.nsh b/cmake/installer/TextLog.nsh
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+# TextLog.nsh v1.1 - 2005-12-26
+# Written by Mike Schinkel [http://www.mikeschinkel.com/blog/]
+ 
+Var /GLOBAL __TextLog_FileHandle
+Var /GLOBAL __TextLog_FileName
+Var /GLOBAL __TextLog_State
+ 
+!define LogMsg '!insertmacro LogMsgCall'
+!macro LogMsgCall _text
+        Call LogSetOn
+	Push "${_text}"
+	Call LogText
+	Call LogSetOff
+!macroend
+ 
+ 
+!define LogText '!insertmacro LogTextCall'
+!macro LogTextCall _text
+	Push "${_text}"
+	Call LogText
+!macroend
+ 
+Function LogText
+	Exch $0   	; pABC -> 0ABC
+	FileWrite $__TextLog_FileHandle "$0$\r$\n"
+	Pop $0		; 0ABC -> ABC
+FunctionEnd
+ 
+!define LogSetFileName '!insertmacro LogSetFileNameCall'
+!macro LogSetFileNameCall _filename
+	Push "${_filename}"
+	Call LogSetFileName
+!macroend
+ 
+Function LogSetFileName
+	Exch $0   	; pABC -> 0ABC
+	StrCpy $__TextLog_FileName "$0"
+	StrCmp $__TextLog_State "open" +1 +3
+	Call LogSetOff
+	Call LogSetOn
+	Pop $0		; 0ABC -> ABC
+FunctionEnd
+ 
+!define LogSetOn '!insertmacro LogSetOnCall'
+!macro LogSetOnCall
+	Call LogSetOn
+!macroend
+ 
+Function LogSetOn
+	StrCmp $__TextLog_FileName "" +1 AlreadySet
+	StrCpy $__TextLog_FileName "$INSTDIR\install.log"
+AlreadySet:
+	StrCmp $__TextLog_State "open" +2
+	FileOpen $__TextLog_FileHandle  "$__TextLog_FileName"  a
+        FileSeek $__TextLog_FileHandle 0 END
+	StrCpy $__TextLog_State "open"
+FunctionEnd
+ 
+!define LogSetOff '!insertmacro LogSetOffCall'
+!macro LogSetOffCall
+ 	Call LogSetOff
+!macroend
+ 
+Function LogSetOff
+	StrCmp $__TextLog_State "open" +1 +2
+	FileClose $__TextLog_FileHandle
+	StrCpy $__TextLog_State ""
+FunctionEnd
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