*Thanks. In Xilinx I had selected all the files as VHDL2008 files. It doesn’t seem to support the full VHDL2008 features– for eg, I got an error tee not declared in
tee(TranscriptFile, buf) ;
however I see use std.textio.all library being included. I am not sure if I should enable some other switch or not. I will post on Xilinx forum as well.