[COFF] Self-hosting languages (was: Book Recommendation)

[Brantley Coile]

Unstring was his friend, I would guess. Nothing in COBOL is recursive. 

> On Nov 23, 2021, at 7:38 PM, Greg 'groggy' Lehey <grog at lemis.com> wrote:
> 
>> On Tuesday, 23 November 2021 at 10:23:47 -0500, Clem Cole wrote:
>> Moving to COFF where this probably belongs because its less UNIX and more
>> PL oriented.
>> 
>>> On Tue, Nov 23, 2021 at 3:00 AM Henry Bent <henry.r.bent at gmail.com> wrote:
>>> 
>>> What language were the PL/I compilers written in?
>>> 
>> I don't know about anyone else, but the VAX PL/1 front-end was bought by
>> DEC from Freiburghouse (??SP??) in Framingham, MA. It was written in PL/1
>> on a Multics system.
> 
> I can easily believe that PL/I was written in PL/I.  While at Tandem,
> I met Don Nelson, apparently an important member of the COBOL world.
> He was, of course, responsible for our COBOL compiler (which, again
> I'm told, had quite a good reputation).  Don told me that he had
> written it entirely in COBOL.
> 
> Now that's a whole different level of difficulty.
> 
> Greg
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