Change cinst from stdin input to use arguments. As we have to execute this process on Windows over the shell a stdin / stdout communication is not really possible without some major hacks. So you now have to supply an instructions file and the path to the certificatelist as arguments when this process is called

set (m13_common_src
   certhelp.c
   listutil.c
   logging.c
   portpath.c
   strhelp.c
)

add_library(m13_common STATIC ${m13_common_src})