From nobody Tue May 27 09:21:43 2025 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4b66Zv5xZKz5x9qb; Tue, 27 May 2025 09:21:43 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4b66Zv3zxmz3Snn; Tue, 27 May 2025 09:21:43 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1748337703; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=eVqi5ASKwFZLmDyw871BtQctDF4oop/UTlD/mjBxVaA=; b=tadVL/CZdTZmofO9hy1r4qiVrIy5IhLeK1hUW2imsuBLHBpeKNaQMrUVo+vJW8+g06dNrB 99pA82gs+a/py+M2Hxq3xMVtD+0MKDhVNxuOwzgAXNRmktort5H6HXZJL2C0IR+J4T2a+8 tT7FYnJQ6cD+Fs3WLTr7SpJqL5nwAbrm0cdltBAk4irc2nwxvB3xPs2IDPz+1/5Lbh9aKg hLkM6jZScpzQzcA+FxLb9/rQYYVq9hDCdLAeMc4YlFkvysXbeKXWRq8YUMNS0We/Z6H1hL G7QJZmgSwWz8iqCgOMai0iVWycxRl2iS2VfkmRxMOTIawG63hFx7xJZ+Bk6T6A== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1748337703; a=rsa-sha256; cv=none; b=ErC7+4dghTaUUcAaLl9jM5S6QQpHBqIf5hAqFbhb8/VftFTeezLyxtDe8mKvKzha8A/CoO YPpdFUHTwgkkuNz4IbXA9YH9D1PP2uv8HZNCWGIgSIdmGf0VTYJQwYAyIJxXLPIJKO/6m3 JQmplEKSAXptB5FyBz2vn68tpTSEpMdpiyihbBQ/C0vkHObMFdd5iqxG1/krOanUnQLthI zBTz2RLMwVz0rFmz/OiJMaSi1beAlYemJg3m0HJnRoi8PaN/pcs1owRlDfEtOAM+qj/3Yl KC/0WLATsuj/rMFqY7l5WA7P26Ri7lM+LMpV3H+NH5Y2ijfwqOxipRzUxSsZPw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1748337703; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=eVqi5ASKwFZLmDyw871BtQctDF4oop/UTlD/mjBxVaA=; b=yhLTN24jtbdIWbG5xGgchsO4y67kvapxpqoUac6zoV6zGri7SpgF8dwSPMAuKXMIFkE3DI DgJ/v0EwTZq7b+nZJmI06B6hmTMFqGLbfH4AiyGIe/KKA2NbtuxTzfnV9QB2tuN1AppNkN 4KwVMxwZPhNYKqAtimPqyOIkys6oJCbueOIZO4oNVSI/uefnrAQLF6p+EN2eEuYOhFP12k ZdPIOOwaz9QW99VfHnRwixr79yK63vv3DJ8+6QYYtpfspOvht6Wc67PKApOTAyHA7IFp/w Obdh3ZG5L5DS9c9+PbafcbKxxoRloP2ohUPpMteRTuv+U59WKCyYgCRqvlYZdQ== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4b66Zv3KP8zmtK; Tue, 27 May 2025 09:21:43 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 54R9Lhkh041681; Tue, 27 May 2025 09:21:43 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 54R9Lhi5041678; Tue, 27 May 2025 09:21:43 GMT (envelope-from git) Date: Tue, 27 May 2025 09:21:43 GMT Message-Id: <202505270921.54R9Lhi5041678@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Olivier Certner Subject: git: e89d737041d1 - main - config.5: Document CONF_CFLAGS under 'makeoptions' List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: olce X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: e89d737041d15d8b3763c2829ee97dc8fcc69cbc Auto-Submitted: auto-generated The branch main has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=e89d737041d15d8b3763c2829ee97dc8fcc69cbc commit e89d737041d15d8b3763c2829ee97dc8fcc69cbc Author: Olivier Certner AuthorDate: 2025-05-27 07:41:19 +0000 Commit: Olivier Certner CommitDate: 2025-05-27 07:59:05 +0000 config.5: Document CONF_CFLAGS under 'makeoptions' This variable serves to tweak CFLAGS from the kernel configuration file, easing some custom kernel builds. It was introduced by bde@ in 1999. --- usr.sbin/config/config.5 | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/usr.sbin/config/config.5 b/usr.sbin/config/config.5 index 93d65819d1d8..246e20c081ae 100644 --- a/usr.sbin/config/config.5 +++ b/usr.sbin/config/config.5 @@ -316,11 +316,27 @@ variable is specified, .Ar value is assumed to be the empty string. .Pp +Note that, as the common makefiles override the +.Va CFLAGS +variable after having processed the configuration file, +customizing +.Va CFLAGS +directly via +.Ic makeoptions +is not possible. +However, custom compiler flags can be specified using the +.Va CONF_CFLAGS +variable. +They are appended after most of the flags automatically going into +.Va CFLAGS , +allowing to override those that are not essential to the build process. +.Pp Example: .Bd -literal -offset indent -compact makeoptions MYMAKEOPTION="foo" makeoptions MYMAKEOPTION+="bar" makeoptions MYNULLMAKEOPTION +makeoptions CONF_CFLAGS+="-DSOME_CONTROLLING_MACRO" .Ed .\" -------- MAXUSERS -------- .Pp