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Message-ID: <4EC6E179.1030703@gaisler.com> Date: Fri, 18 Nov 2011 23:51:37 +0100 From: "konrad.gaisler" <konrad@...sler.com> To: Randy Dunlap <rdunlap@...otime.net> CC: linux-kernel@...r.kernel.org, linux kbuild list <linux-kbuild@...r.kernel.org>, mmarek@...e.cz, pefoley2@...izon.net, yann.morin.1998@...iens.enib.fr, sam@...nborg.org, zippel@...ux-m68k.org Subject: Re: [PATCH 1/1] kconfig: Add a configuration subtree command to kconfig On 11/18/2011 07:09 PM, Randy Dunlap wrote: > (changed linux-config@ to linux-kbuild@...r.kernel.org) > > On 11/18/2011 06:16 AM, Konrad Eisele wrote: >> New kconfig command "subsource": >> subsource "<kconfig>""<cwd>""<.config>""<title>"<internal_prefix> <.config_prefix> >> Allocates<kconfig> as a configuration subtree using<.config> as the configuration >> file to save and load from.<cwd> is the directory path to switch to for "source" to >> work, "<title>" is the Menu tile of the subtree,<internal_prefix> is a internal prefix, >> and<.config_prefix> is the prefix to append/remove when saving/loading<.config>. > That explains what but not why. You need some justification(s) for such > a large patch. Maybe even some example usages. The patch originated from a buildsystem that uses buildroot and linux. Both use Kconfig and the buildsystem itself uses Kconfig. To configure a subproject you have to exit the toplevel Kconfig and restart to startup a subproject Kconfig, It is even more anoying when looking inside buildroot. It has in its turn subprojects uClibc, busybox, linux, crosstools-ng which all use Kconfig. The subtree patch does make it possible to unify all in one Kconfig. As an example, apply the patch, then add to <top>/Kconfig the lines: subsource "arch/sparc/Kconfig" "." ".config_sparc" "SPARC config" SPARC_ CONFIG_ subsource "arch/mips/Kconfig" "." ".config_mips" "MIPS config" MIPS_ CONFIG_ (my mailclient breaks up the lines, it should be 2 lines only). Then start "make xconfig" once to build "qconfig". The patch adds an extra option to qconfig (also mconfig, gconfig and nconfig) "-s". This option enables the "subsource" tag. Now start qconfig: $<path-to-qconfig>/qconfig -s Kconfig Then you see a subtree "Sparc config" and "Mips config" that is a sparc and mips complete Kconfig. They are independent from another. The Sparc subtree is saved/loaded from .config_sparc, the Mips subtree is saved/loaded from .config_mips. No namespace clash. Note that without the "-s" option the Kconfig behaviour is as usual. I think it would be a help for many projects that use Kconfig. -- Konrad > >> Signed-off-by: Konrad Eisele<konrad@...sler.com> >> --- >> scripts/kconfig/conf.c | 6 +- >> scripts/kconfig/confdata.c | 83 ++- >> scripts/kconfig/expr.h | 16 + >> scripts/kconfig/gconf.c | 3 + >> scripts/kconfig/lkc.h | 1 + >> scripts/kconfig/lkc_proto.h | 12 +- >> scripts/kconfig/mconf.c | 13 +- >> scripts/kconfig/menu.c | 18 +- >> scripts/kconfig/nconf.c | 13 +- >> scripts/kconfig/qconf.cc | 3 + >> scripts/kconfig/symbol.c | 50 ++- >> scripts/kconfig/util.c | 49 ++ >> scripts/kconfig/zconf.gperf | 1 + >> scripts/kconfig/zconf.hash.c_shipped | 252 +++++----- >> scripts/kconfig/zconf.l | 50 ++- >> scripts/kconfig/zconf.lex.c_shipped | 52 ++- >> scripts/kconfig/zconf.tab.c_shipped | 985 ++++++++++++++++++---------------- >> scripts/kconfig/zconf.y | 23 +- >> 18 files changed, 991 insertions(+), 639 deletions(-) > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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