Comment by dfawcus

Except ANSI did very little in terms of changing/enhancing the language. It stayed largely as it had been since Nov '78:

Nov 78 Memo: https://www.bell-labs.com/usr/dmr/www/cchanges.pdf

About all that happened with ANSI C was that prototypes were created (the major addition), type promotion rules were altered, plus 'const' and 'volatile' were added. ANSI also added 'void *'.

I've a vague recall about 'void' existing in unix C compilers before that, having read a version of the above memo in a unix manual ('papers' section) and it mentioning 'void'.