From: utzoo!decvax!cca!chris.umcp-cs@Udel-Relay@sri-unix
Newsgroups: net.unix-wizards
Title: Re:  Library functions with non-integer return types
Article-I.D.: sri-unix.3340
Posted: Sat Sep 18 01:31:29 1982
Received: Wed Sep 22 10:36:02 1982

From:     Chris Torek 
Date:     15 Sep 82 1:57:03-EDT (Wed)
Declaring functions in header files does not cost anything in the
Portable C Compiler.  The compiler does only one thing with function
declarations that have no body: put the function into the definitions
table with the right type and a definition of "unneeded".  When the
function is REFERENCED the definition becomes "external".