@User yes you can use tclreadline with openroad. It looks for it as: set(TCL_READLINE_POSSIBLE_NAMES tclreadline-2.1.0 tclreadline-2.3.2 tclreadline-2.3.6 tclreadline-2.3.7 tclreadline-2.3.8 ) and will use it if found. You'll get a message during cmake: message(STATUS "TCL readline library: ${TCL_READLINE_LIBRARY}") see src/CMakeLists.txt

Ah, thanks. I was just using regular readline.