From: utzoo!decvax!cca!mullen@Nrl-Css@sri-unix
Newsgroups: net.unix-wizards
Title: Re: Naming Conventions for System Libraries
Article-I.D.: sri-unix.3402
Posted: Tue Sep 21 18:49:59 1982
Received: Wed Sep 22 06:42:18 1982

From: mullen at Nrl-Css (Preston Mullen)
Date: 17 Sep 1982 12:03:29-EDT
The 4.1bsd C compiler allows '$' as a character in identifiers
(it's a "letter").  The C preprocessor does too.  I can't recall
ever seeing this fact documented.

P.S.  Certain 4.1bsd programs, e.g. ctags and vgrind, do not know
this and hence behave strangely when function names include '$'.