From owner-freebsd-questions@freebsd.org Sat Mar 30 13:49:15 2019 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 939DA15511CE for ; Sat, 30 Mar 2019 13:49:15 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from bede.qeng-ho.org (bede.qeng-ho.org [217.155.128.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4FE2988CEE for ; Sat, 30 Mar 2019 13:49:14 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from arthur.home.qeng-ho.org (arthur.home.qeng-ho.org [172.23.1.2]) by bede.qeng-ho.org (Postfix) with ESMTP id 35C2F1034E; Sat, 30 Mar 2019 13:49:07 +0000 (GMT) Subject: Re: Was PCC ever considered? To: Lowell Gilbert , freebsd-questions@freebsd.org References: <44imw19sm9.fsf@be-well.ilk.org> From: Arthur Chance Message-ID: <0f13de52-46b7-acab-83c4-e128bf20ba7c@qeng-ho.org> Date: Sat, 30 Mar 2019 13:49:06 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.6.0 MIME-Version: 1.0 In-Reply-To: <44imw19sm9.fsf@be-well.ilk.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4FE2988CEE X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; spf=pass (mx1.freebsd.org: domain of freebsd@qeng-ho.org designates 217.155.128.241 as permitted sender) smtp.mailfrom=freebsd@qeng-ho.org X-Spamd-Result: default: False [-4.32 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:217.155.128.240/29]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DMARC_NA(0.00)[qeng-ho.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[mx1.mythic-beasts.com,mx2.mythic-beasts.com]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.49)[-0.492,0]; RCVD_TLS_LAST(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:13037, ipnet:217.155.0.0/16, country:GB]; MID_RHS_MATCH_FROM(0.00)[]; IP_SCORE(-2.52)[ip: (-7.64), ipnet: 217.155.0.0/16(-3.82), asn: 13037(-1.04), country: GB(-0.09)]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Mar 2019 13:49:15 -0000 On 29/03/2019 23:18, Lowell Gilbert wrote: > Mayuresh Kathe writes: > >> Since FreeBSD uses Clang/LLVM (which is kind-a huge) I wondered if PCC >> was ever considered during the GCC days or even while contemplating >> the switch to Clang/LLVM. >> >> If PCC was considered but rejected, may I know the reasons and >> rationale for the same? > > The standard compiler for a POSIX system has to be able to build its > kernel. PCC has never come close to being able to do that on *any* > operating system with which I am familiar. It happily compiled Unix from the Seventh Edition from Bell Labs through to 4.3BSD on the Berkeley branch and I think SVR3(?) on the AT&T branch. -- What do we want? A time machine! When do we want it? Errm ...