From owner-freebsd-hackers@freebsd.org Wed Jan 6 22:51:53 2021 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8D9754E2813 for ; Wed, 6 Jan 2021 22:51:53 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "m5p.com", Issuer "R3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DB4P44zDRz3gyl for ; Wed, 6 Jan 2021 22:51:52 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from [IPv6:2001:470:1f07:15ff::26] (court.m5p.com [IPv6:2001:470:1f07:15ff:0:0:0:26]) (authenticated bits=0) by mailhost.m5p.com (8.15.2/8.15.2) with ESMTPSA id 106MpewU085463 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Wed, 6 Jan 2021 17:51:45 -0500 (EST) (envelope-from george+freebsd@m5p.com) Subject: Re: clang vs gcc warning flags (off-topic anecdote) To: freebsd-hackers@freebsd.org References: From: George Mitchell Message-ID: Date: Wed, 6 Jan 2021 17:51:39 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="x09t1S8ak2I65BKJFV6E7yx9V9v7dArhZ" X-Spam-Status: No, score=-0.3 required=10.0 tests=HELO_MISC_IP, HELO_NO_DOMAIN, NICE_REPLY_A autolearn=unavailable autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on mattapan.m5p.com X-Rspamd-Queue-Id: 4DB4P44zDRz3gyl X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of george@m5p.com designates 74.104.188.4 as permitted sender) smtp.mailfrom=george@m5p.com X-Spamd-Result: default: False [-3.40 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; HAS_ATTACHMENT(0.00)[]; TO_DN_NONE(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-0.999]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~]; RBL_DBL_DONT_QUERY_IPS(0.00)[74.104.188.4:from]; ASN(0.00)[asn:701, ipnet:74.104.0.0/16, country:US]; MID_RHS_MATCH_FROM(0.00)[]; TAGGED_FROM(0.00)[freebsd]; R_DKIM_NA(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[m5p.com]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[74.104.188.4:from:127.0.2.255]; NEURAL_SPAM_LONG(1.00)[1.000]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-hackers] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jan 2021 22:51:53 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --x09t1S8ak2I65BKJFV6E7yx9V9v7dArhZ Content-Type: multipart/mixed; boundary="yzYODdsOtE9aTAX6MlBfQMsfGws0ya0R0"; protected-headers="v1" From: George Mitchell To: freebsd-hackers@freebsd.org Message-ID: Subject: Re: clang vs gcc warning flags (off-topic anecdote) References: In-Reply-To: --yzYODdsOtE9aTAX6MlBfQMsfGws0ya0R0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 1/6/21 4:34 PM, Ryan Libby wrote: > [...] > How I've actually seen "nested externs" used is usually to make > variables visible without including headers, for one reason or another.= > [...] My daughter, who knew quite a bit about programming before going to college, had an instructor who *insisted* that his students declare all their external functions inside the function calling them, even in C code. It appears he didn't really know C and had only taught Pascal up to that point. -- George --yzYODdsOtE9aTAX6MlBfQMsfGws0ya0R0-- --x09t1S8ak2I65BKJFV6E7yx9V9v7dArhZ Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsF5BAABCAAjFiEENdM4ZHktsJW5kKZXwRES3m+p4fkFAl/2PvsFAwAAAAAACgkQwRES3m+p4fmM wBAAiaE93scP13L12JKb8GVNKvE7WXphAbJ7r65I9mTcxbeIy0gkzpr9huz0zP/i6YfSEyVh00nR Q3GdI5aYiqXs/qVcp1yYkMJ4JPRszXhXTOq0Dgnlcy8MVem8MmPgerCQZtGucoZTEF7DCgov7ES/ kYTgWB0Ndx7w5BbyS76rykwmGt3jAJE7saQllJ+vJ6jlbHIC90OSsuPOqIQlp9I4V+5mXsqqZ5Hb o6K7YvU+JK6VpivLiJyZS+sqkNQgTG1AW55cEfD+gbzLR+AVm3cKo4euc+9nZaEaUmJda2XwTCF8 nUjXVW5xaYvkJQO3RBjvNBSgx/4V8cVafgjhPKIW3gzHuxFFHkhoo9wwBaMARnqhz68re+4sF31u bABRaWOb0nVvTRp7JECIrAdXLWMEwITJGgZdPD5Z7LWjiw816LwBMK77I3mZEipXaG5beSQKk5I2 ruX/YPlbQsHrJLI2lALHFF42feDpHtuaT6BaHu9KWd81Mh74Kobxl5K++Plvf0LoFi/7LQFtrlNc XVisi9yROXj5pFOiJ7Tn3phS2cqX8E4P+hezlonUH0xIs2SevtFabbKM8U8g2JsykD23lleUmI+h yMKv9lb9NTH9eH0OQ5EhAuiSZuIV1kzfMrqdY/wVK58dGdPPwxkrqaKe30xOqewLzwYdX6zAgCTL km0= =eQ5H -----END PGP SIGNATURE----- --x09t1S8ak2I65BKJFV6E7yx9V9v7dArhZ--