From owner-freebsd-standards@freebsd.org Fri Apr 14 15:48:41 2017 Return-Path: Delivered-To: freebsd-standards@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D55D0D3D0A1 for ; Fri, 14 Apr 2017 15:48:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (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 B95E81B27 for ; Fri, 14 Apr 2017 15:48:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v3EFmfhf068990 for ; Fri, 14 Apr 2017 15:48:41 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-standards@FreeBSD.org Subject: [Bug 218657] Usage of I (_Complex_I) from complex.h results in unexpected warnings with clang -pedantic Date: Fri, 14 Apr 2017 15:48:41 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: standards X-Bugzilla-Version: 9.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: akari@alienslab.net X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-standards@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-standards@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Standards compliance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Apr 2017 15:48:41 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218657 Bug ID: 218657 Summary: Usage of I (_Complex_I) from complex.h results in unexpected warnings with clang -pedantic Product: Base System Version: 9.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: standards Assignee: freebsd-standards@FreeBSD.org Reporter: akari@alienslab.net Created attachment 181784 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D181784&action= =3Dedit the test program Compile the attached test program with: clang -std=3Dc11 -pedantic test.c -= o test This is expected to compile without warnings. However, it produces an "imaginary constants is a GNU extension" warning on FreeBSD. This is because _Complex_I is defined as ((float _Complex)1.0i) in /usr/include/complex.h. The easiest workaround would be to use __extension__ to suppress the warnin= g, i.e. redefine _Complex_I as (__extension__ (float _Complex)1.0i). This is w= hat glibc does as well. It's a minor issue, but it prevents a project I'm working on from building = with -Wall on FreeBSD. --=20 You are receiving this mail because: You are the assignee for the bug.=