On Sat, Jun 7, 2025 at 2:07 PM Aron Insinga <aki@insinga.com> wrote:

Anybody know offhand what the last release was before stdio? Thanks.
The C compiler in the Sixth Edition predates K&R1 and the stdio library.   The Portable I/O Library existed as is included with V6, but not all program use it.  "Typesetter C" was released concurrently with the with updated troff typesetter support and was required to compile it.  It supplied libS.a as described in K&R1 and compiled on Sixth Edition, although I believe was included in PWB 1.0.  By the Seveneth edition, libS.a was removed all its routine were included in libc.a.  

If you look in the sources in the TUHS archives, you can see the progression.