From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Philipp Stephani Newsgroups: gmane.emacs.devel Subject: Re: macOS/GCC support policy Date: Fri, 2 Aug 2019 16:59:18 +0200 Message-ID: References: <20190718192321.65684-1-pcr910303@icloud.com> <20190719041654.88561-1-pcr910303@icloud.com> <83pnm5t8ui.fsf@gnu.org> <20190729202649.GA89035@breton.holly.idiocy.org> <0A9ED54B-E381-44AA-9512-40CC0481F097@icloud.com> <20190731195633.GA5520@breton.holly.idiocy.org> <8336ilipe2.fsf@gnu.org> <20190801213958.GA30753@breton.holly.idiocy.org> <838sscgimf.fsf@gnu.org> <83sgqjg4z1.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="266899"; mail-complaints-to="usenet@blaine.gmane.org" Cc: Alan Third , pcr910303@icloud.com, Emacs developers To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Aug 02 17:00:52 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1htZ35-0017BH-C5 for ged-emacs-devel@m.gmane.org; Fri, 02 Aug 2019 17:00:51 +0200 Original-Received: from localhost ([::1]:35474 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htZ34-0000Ki-DF for ged-emacs-devel@m.gmane.org; Fri, 02 Aug 2019 11:00:50 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45674) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htZ1p-0007Zb-0q for emacs-devel@gnu.org; Fri, 02 Aug 2019 10:59:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1htZ1n-0004Q0-Se for emacs-devel@gnu.org; Fri, 02 Aug 2019 10:59:32 -0400 Original-Received: from mail-ot1-x32b.google.com ([2607:f8b0:4864:20::32b]:44221) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1htZ1m-0004OG-B2; Fri, 02 Aug 2019 10:59:30 -0400 Original-Received: by mail-ot1-x32b.google.com with SMTP id b7so28248695otl.11; Fri, 02 Aug 2019 07:59:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=tj4+g5R+mdS8bGPgkbl4f5cCrPk7T9fhSwXDtD/5Boc=; b=SQW4OYHlet2sXJZFajXT+G/H5WCvW7fugOTsM66xff+wESKwR9P7QPOL16x0exwplw xo6SwXbbQT8db23fVIxdeuCctPXf59sbnr5AaC0UForEIBk/yFXfIlJO9oLXrJsihBWD 6LwFsDThjE9t21CTBPQGZXjbHlwiPLxTI8TVzAxWwLUtB2gAmTcrbxZL/HRFIGABlfoB d2rG0qzijPt+9tPVrhA361wXVG5X48T+J1QzOIj/RXktzlUZjElziNITCc2uESaitD8w LMSDBx7zqeo5YNL8m00bzFdZsLCcuDrqnZDwfhug1CA+Lz+Lk4eH9KnZROu8jH2ighAs 0t/w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=tj4+g5R+mdS8bGPgkbl4f5cCrPk7T9fhSwXDtD/5Boc=; b=nBTnTN/AmamLpInPo1fiIhQ1GlMS8VC5CFDjG4NAnF+omsi+tScYnyGU7yhWzoHGwc 9RmedTVKAI1J3Oq/axaRKUdvS5ETeKk5K7FA+Rb0L/Xn1KJnwoVQsFO/N8oJM5aFzAeo BC77VRO7hAnJqsjVqUNQAw6xtRMeeSoaRLQKknCkAtkngRXgcyT6IjvaT4U1NohuI/96 6V1YaQew5PAlOuf2QCuFVu3HScA5nZGYlL//8mq9UrIRJ1CRs3w6xfOd3Ww0+SsORo/U r2AAqv1uXJ6/pL/trZaw0JzjpxO0wHsP5XuM+PrJP0NhKAcYBDAwjvtZ0kKwAD22Z6dK B7pg== X-Gm-Message-State: APjAAAVhzQ/A5zbO3S82OXKezwnMEiEjBbq2phllpugFA2RgwXGAYS31 VqmS/diHhfnqkNXDkOKhl0vd0C9iwBA2bDtYnEvk0hg6a3s= X-Google-Smtp-Source: APXvYqy+nt/CmAig9iVM8X8p19WWjqQKeuwb4NjSwsMBrM9PoG4fn871mUufY0mDRuizIoDknzNDo4p7tWhysFRgUgA= X-Received: by 2002:a9d:6194:: with SMTP id g20mr30410242otk.149.1564757969276; Fri, 02 Aug 2019 07:59:29 -0700 (PDT) In-Reply-To: X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::32b X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239136 Archived-At: Am Fr., 2. Aug. 2019 um 16:55 Uhr schrieb Philipp Stephani : > > Am Fr., 2. Aug. 2019 um 13:51 Uhr schrieb Eli Zaretskii : > > > > > From: Philipp Stephani > > > Date: Fri, 2 Aug 2019 12:08:35 +0200 > > > Cc: Alan Third , pcr910303@icloud.com, > > > Emacs developers > > > > > > > What exactly prevents building with GCC on macOS? > > > > > > > > > > I haven't investigated in detail, but when I try to run configure with > > > GCC 9 from Homebrew, I get the error message > > > > > > checking AppKit/AppKit.h usability... no > > > checking AppKit/AppKit.h presence... yes > > > configure: WARNING: AppKit/AppKit.h: present but cannot be compiled > > > configure: WARNING: AppKit/AppKit.h: check for missing prerequisite headers? > > > configure: WARNING: AppKit/AppKit.h: see the Autoconf documentation > > > configure: WARNING: AppKit/AppKit.h: section "Present But Cannot > > > Be Compiled" > > > configure: WARNING: AppKit/AppKit.h: proceeding with the compiler's result > > > configure: WARNING: ## ------------------------------------ ## > > > configure: WARNING: ## Report this to bug-gnu-emacs@gnu.org ## > > > configure: WARNING: ## ------------------------------------ ## > > > checking for AppKit/AppKit.h... no > > > configure: error: The include files (AppKit/AppKit.h etc) that > > > are required for a Nextstep build are missing or cannot be compiled. > > > Either fix this, or re-configure with the option '--without-ns'. > > > > Thanks. It would be good if someone could investigate what is the > > problem here (and any other problems, if there are any). > > Excerpt from config.log: > > configure:10941: checking AppKit/AppKit.h usability > configure:10941: gcc-9 -c -g3 -O1 -fsanitize=address > -fsanitize=undefined -fno-omit-frame-pointer -x objective-c -x > objective-c conftest.c >&5 > In file included from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/os/object.h:101, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/dispatch/dispatch.h:48, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFStream.h:20, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFPropertyList.h:17, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:60, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:6, > from > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10, > from conftest.c:142: > /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/objc/NSObject.h:22:4: > error: unknown type name 'instancetype' > 22 | - (instancetype)self; > | ^~~~~~~~~~~~ > > (lots of similar errors follow) > > This indicates that GCC treats the header as C instead of Objective C. > Which is interesting because -x objective-c is given explicitly. Does > GCC need some other flag to force compilation as Objective C? The behavior difference is indeed trivial to reproduce: p@p:/tmp$ cat appkit.c #include p@p:/tmp$ clang -c -x objective-c appkit.c 2> /dev/null ; echo $? 0 p@p:/tmp$ gcc-9 -c -x objective-c appkit.c 2> /dev/null ; echo $? 1 Without the redirection GCC prints tons of similar errors.