Don't rebuild switch_version.h everytime, only when it changes.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@330 d0543943-73ff-0310-b7d9-9358b9ac24b2

w32/vsnet/FreeSwitchCore.vcproj

@@ -315,10 +315,6 @@
 				RelativePath="..\..\src\include\switch_utils.h"
 				>
 			</File>
-			<File
-				RelativePath="..\..\src\include\switch_version.h"
-				>
-			</File>
 		</Filter>
 		<Filter
 			Name="Resource Files"

w32/vsnet/GetLibs.vbs

-'On Error Resume Next
+On Error Resume Next
 ' **************
 ' Initialization
 ' **************
@@ -101,7 +101,6 @@ End If
 ' ******************
 
 If BuildCore Then
-	FSO.CopyFile FreeswitchDir & "src\include\switch_version.h.in", FreeswitchDir & "src\include\switch_version.h", true
 	VersionCmd="svnversion " & quote & FreeswitchDir & "." & quote &  " -n"
 	Set MyFile = fso.CreateTextFile(UtilsDir & "tmpVersion.Bat", True)
 	MyFile.WriteLine("@" & VersionCmd)
@@ -112,7 +111,19 @@ If BuildCore Then
 		VERSION=strFromProc
 	Loop While Not OExec.StdOut.atEndOfStream
 	
+	Set fOrgFile = FSO.OpenTextFile(UtilsDir & "lastversion", ForReading, FailIfNotExist, OpenAsASCII)
+	sLastVersion = fOrgFile.ReadLine()
+	fOrgFile.Close
+	
+	If VERSION <> sLastVersion Then
+		Set MyFile = fso.CreateTextFile(UtilsDir & "lastversion", True)
+		MyFile.WriteLine(VERSION)
+		MyFile.Close
+	
+		FSO.CopyFile FreeswitchDir & "src\include\switch_version.h.in", FreeswitchDir & "src\include\switch_version.h", true
 		FindReplaceInFile FreeswitchDir & "src\include\switch_version.h", "@SVN_VERSION@", VERSION
+	End If
+
 
 	If Not FSO.FolderExists(LibDestDir & "include") Then
 		FSO.CreateFolder(LibDestDir & "include")