second part: make win32 generate nsIBuildID.h dynamically

config/makefile.win

@@ -55,15 +55,16 @@ include <$(DEPTH)/config/rules.mak>
 
 # update build number from within make script
 build_number::
-!ifdef MOZILLA_OFFICIAL
+    echo Generating build number...
     $(RM) $@
     $(PERL) bdate.pl > $@
+    $(PERL) build_header.pl nsBuildID.h $@
+!ifdef MOZILLA_OFFICIAL    
     echo Setting build number...
     $(PERL) aboutime.pl $(DEPTH)/xpfe/browser/resources/locale/en-US/navigator.dtd $@
     $(PERL) aboutime.pl $(DEPTH)/xpfe/browser/resources/content/viewSource.xul $@
 !endif
 
-
 #// Rule to set the timebomb on official mozilla builds
 
 
@@ -90,6 +91,7 @@ makedep.exe:: makedep.cpp
     $(CC) -MT /O2 /GB $**
 
 export:: makecopy.exe mangle.exe mantomak.exe bin2rc.exe makedep.exe build_number
+       $(MAKE_INSTALL) nsBuildID.h $(PUBLIC)
 
 !ifdef MOZ_FULLCIRCLE