File::Slurp is typically not installed by default. For Debian, install
it with sudo apt-get install libfile-slurp.perl
# source code for use on a PDP10. This version is meant to be called
# from the Unix Frotz's top level Makefile and work on the files present.
+# This requires File::Slurp, which is typically not installed by default.
+# Debian: sudo apt-get install libfile-slurp-perl
+
# TODO: Save the names of header files that need to be shortened. Then
# go through the .c files and shorten them there too.