Get rid sys/share/cpp[123].shr, the pre-ANSI C preprocessor that was
included in the source distribution for use on systems with ancient
C compilers whose preprocessor that couldn't cope with nethack's large
number of macros.
Re-run nhgitset.pl to install.
"perldoc DEVEL/hooksdir/nhsub" for details. General docs still to come.
Quick notes:
- "git nhsub" lets you apply substitutions to a file without involving any
version control.
- When doing nhadd/nhcommit, the working directory WILL reflect the results
of the substitutions.
Let's see what this breaks.
