Date: Tue, 27 May 2025 09:21:43 GMT From: Olivier Certner <olce@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: e89d737041d1 - main - config.5: Document CONF_CFLAGS under 'makeoptions' Message-ID: <202505270921.54R9Lhi5041678@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=e89d737041d15d8b3763c2829ee97dc8fcc69cbc commit e89d737041d15d8b3763c2829ee97dc8fcc69cbc Author: Olivier Certner <olce@FreeBSD.org> AuthorDate: 2025-05-27 07:41:19 +0000 Commit: Olivier Certner <olce@FreeBSD.org> 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202505270921.54R9Lhi5041678>