From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#42147: 28.0.50; pure vs side-effect-free, missing optimizations? Date: Sat, 04 Jul 2020 12:33:57 -0400 Message-ID: References: <3A9CC2A3-8307-47B2-8D80-795C0AF020E1@acm.org> <0433A879-C98D-4B1A-B85C-A15DA9289099@acm.org> <1621669100.2102667.1593639091621@mail.yahoo.com> <775819003.2516724.1593687594435@mail.yahoo.com> <5F2B4684-34D1-4474-8909-9F435369FE54@acm.org> <705260433.2731607.1593698199171@mail.yahoo.com> <6CF8EE58-9A49-40E7-AA86-48AB39BF94BA@acm.org> <28B19D86-343C-4126-B95F-1F38735F73F2@acm.org> <1288c6a5-545b-f68c-ff6b-7683db3e54c1@cs.ucla.edu> <0AF276D8-FB28-4745-AAE4-DC30E0441F89@acm.org> <793d67e0-68a0-fc53-89a9-0902747d6389@cs.ucla.edu> <83zh8ftfwr.fsf@gnu.org> <672f15b0-04f9-e884-4815-85ca1d1af9bb@cs.ucla.edu> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31576"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: mattiase@acm.org, andrea_corallo@yahoo.it, 42147@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Jul 04 18:35:14 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jrl8C-00080c-Ff for geb-bug-gnu-emacs@m.gmane-mx.org; 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h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=QGIztj5jago37jav2e7/ZJ94JHCBOFCUAiecaKOllVGX0SjmvnfIsS+BMi1dxfPmF M9bXPK+k4aik+fRo5/kNiQSiA5qgPY9iiCSTm1+H7qMeKgYuuyWSmW55ZcPDkzMG8L vrFdYNaMosf7oRuEeTwpSYBOzTXkj3+ULjRS6bhtDGU56pmZHWEhu5yARTDY4xmOw6 sK+TaeppGWlYs+PHfsgcUvVeWn+IxY30m6s5q9givLQ9o4mrxBg75miUo3LMiNaaRs 20xHYdDGm/1N39/eaaKI0tg18Ujeh6S5pw6hUl1mtHH9mIZ1tk5wSNnUA1GaxOLo1d vv5UAZX0GPlgw== Original-Received: from alfajor (unknown [157.52.0.200]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id A6BF71207A5; Sat, 4 Jul 2020 12:33:58 -0400 (EDT) In-Reply-To: <672f15b0-04f9-e884-4815-85ca1d1af9bb@cs.ucla.edu> (Paul Eggert's message of "Sat, 4 Jul 2020 09:27:23 -0700") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:182700 Archived-At: >>> * configure.ac: On x86 with GCC, default to -msse2 -mfpmath=sse. >> This assumes that the system on which Emacs runs is the same as where >> it was built, doesn't it? > It doesn't assume they're the same system. It merely assumes that build and > host platforms both support SSE2, which is a safe assumption nowadays. Is there a way to tell gcc to try and avoid x87's idiosyncrasies without being platform-dependent (or at least without imposing SSE2, since I still use Emacs on my old Thinkpad X30)? Stefan