From owner-freebsd-arm@freebsd.org Tue Sep 26 04:38:36 2017 Return-Path: Delivered-To: freebsd-arm@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 CD236E2EA44 for ; Tue, 26 Sep 2017 04:38:36 +0000 (UTC) (envelope-from russ.haley@gmail.com) Received: from mail-wr0-x231.google.com (mail-wr0-x231.google.com [IPv6:2a00:1450:400c:c0c::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 58E4875C4D for ; Tue, 26 Sep 2017 04:38:36 +0000 (UTC) (envelope-from russ.haley@gmail.com) Received: by mail-wr0-x231.google.com with SMTP id k20so11285423wre.4 for ; Mon, 25 Sep 2017 21:38:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=voDwFx2kC9j0vLv5Ff6knWbMS36pNDd10mxLzMYvH7I=; b=his3iKvyXpCV3EPqgUd6x06pPt6HgAd+Gf8EBh+kABwry9KjHk54zEICO+IDU/yUEB 4//cAmZ90r46TEZZ/dZoCGcIlqNdRnOU2v27kMTQFTHx/+YawD4SnfTSDyniBfHZjCE1 oNogNlYYc5Fu7RlqlD8LbhGV0fleYxfyLopWgt7K9dTXWou/DbU1N3L5C002Irfb84Jj v8UcXd9brshBA1GkMUTUP4nEfTpPbA8WiAh74xawdLN1OEEZw2v3HFYnmZ8L/i/bnkAO gNJw8V8stIk+QjNAy91j5BPjz2zyFHJXZzyu70m3RSbP9Wq6YOS+BbDHt20FZYauOkMi FRqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=voDwFx2kC9j0vLv5Ff6knWbMS36pNDd10mxLzMYvH7I=; b=gXKmrzCg7E8YZlkzsNYoFk5+3du+yxaMLq+cW82Z7qYiq1exJIXPJEgAdZ0Yo+7ixn x86QeMc9vkBbnCsUtgXqSF7KtXhId5FqG8HAamtfEy8xrEO484ifoLOJqHiaRC3H0d6E 7M/p90WF0k8yDtuBo89jkcvqB8lhuthOjTbjIrQQhec8ajrX2+rgTRmI2SD3m2B0K5UK h5ZaN1Ehui85yIGxYWg5rv9FHya4/B0IDVlUTnufTZzcIkV2u1JqTuo/xlawlQDnBOZ2 hh/w8F9sm/MrFYLKzWdSynEgWPNM7lyPCkb7kiqlLVMb68VpUIzJKR8+KIK0lNSVFJcC bVCA== X-Gm-Message-State: AHPjjUjtKQYp+WRS21zOB2pjpUT3bN2eUmovVCDpgqHW9slGqYDw66LD 4fft0Ny9jt+x7tjZ316mRjZQnsbCKdeqLygkZ3xMqw== X-Google-Smtp-Source: AOwi7QDKqju52IaLnNcC+7jR71Z4+D8Y8LtptjAzW38bCH5MdDqHOaEDZq7EAOXpdBh40QNhNs8AmqNe1N6XZvzWNRo= X-Received: by 10.46.9.150 with SMTP id 144mr3496223ljj.30.1506400714191; Mon, 25 Sep 2017 21:38:34 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.81.65 with HTTP; Mon, 25 Sep 2017 21:38:33 -0700 (PDT) From: Russell Haley Date: Mon, 25 Sep 2017 21:38:33 -0700 Message-ID: Subject: Why does this compile? To: freebsd-arm Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Sep 2017 04:38:36 -0000 Hi, I'm trying to compile the new dotnet core 2.0 and I've run into a C problem I don't understand. Since I ran the code to check it on my arm board, I'm going to ask here (the most knowledgeable fbsd C people I could ask). The cmake file is trying to test for a linux struct in_pktinfo: check_c_source_compiles( " #include <${SOCKET_INCLUDES}> int main() { struct in_pktinfo; return 0; } " HAVE_IN_PKTINFO) SOCKET_INCLUDES resolves to netinet/in.h so the final source is: #include int main() { struct in_pktinfo; return 0; } This compiles on FreeBSD current and apparently on 11 too. That's a bad thing because it's supposed to fail. I checked in.h and there is no struct for in_pktinfo. Not surprisingly, if I remove the include altogether, it still compiles. I assume then that the original author made a mistake? My C is too weak and most of my searches don't turn up anything close to what I'm looking for. Any suggestions would be awesome. :) Thanks, Russ