From mboxrd@z Thu Jan 1 00:00:00 1970 From: clemc@ccc.com (Clem Cole) Date: Tue, 3 Jan 2017 16:57:55 -0500 Subject: [TUHS] When was #if introduced in C? (was: Re: Mac OS X is Unix) In-Reply-To: References: <201701032019.v03KJ8oq028944@tahoe.cs.Dartmouth.EDU> <20170103213331.GN31772@yeono.kjorling.se> Message-ID: Great minds think alike.. This lines up with my memory. On Tue, Jan 3, 2017 at 4:53 PM, Robert Swierczek wrote: > > Which makes me curious... Does anyone here happen to know when #if was > introduced in C? > > From what I can gather from studying the TUHS archives, the earliest > cpp that supports #if is in PWB: > http://minnie.tuhs.org/cgi-bin/utree.pl?file=PWB1/sys/c/c/cpp.c > > Before that, the pre-processor resides within the cc.c command and #if > is not supported: > http://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/source/s1/cc.c > -------------- next part -------------- An HTML attachment was scrubbed... URL: