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Some users of kconfig need some packages to be built before their
kconfig infra be used.
For example, the linux kernel, starting with 4.16, needs flex and bison
to generate the parser code. Furthermore, starting with 4.18, it will
also need the cross-compiler before parsing the kconfig stuff, because
that calls the compiler to check its features.
Currently, this is broken, even the flex/bison ones, even though they
are listed, because there is no way to define dependencie that are
guaranteed before the (visual) configurators. For example:
$ make distclean
$ make menuconfig
--> enable the linux kernel, choose a defconfig, save, exit
$ make linux-menuconfig
[...]
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
YACC scripts/kconfig/zconf.tab.c
/bin/sh: bison: command not found
LEX scripts/kconfig/zconf.lex.c
scripts/Makefile.lib:196: recipe for target 'scripts/kconfig/zconf.tab.c' failed
make[3]: *** [scripts/kconfig/zconf.tab.c] Error 127
make[3]: *** Waiting for unfinished jobs....
/bin/sh: flex: command not found
scripts/Makefile.lib:188: recipe for target 'scripts/kconfig/zconf.lex.c' failed
make[3]: *** [scripts/kconfig/zconf.lex.c] Error 127
Makefile:528: recipe for target 'rpc_defconfig' failed
make[2]: *** [rpc_defconfig] Error 2
linux/linux.mk:511: recipe for target '/home/ymorin/dev/buildroot/buildroot/output/build/linux-4.17.11/.config' failed
make[1]: *** [/home/ymorin/dev/buildroot/buildroot/output/build/linux-4.17.11/.config] Error 2
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2
So, we introduce a new type of dependencies for kconfig-based packages,
that are guaranteed to be built and installed before the (visual)
configurators are called.
Since those dependencies are phony targets and therefore always out of
date, a normal dependency would cause the .config target to be rebuilt
on each invocation of make. So we use an order-only pre-requisite, like
is done for the patch dependency.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Jan Kundrát <jan.kundrat@cesnet.cz>
Tested-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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Content provided by Yann E. Morin.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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The previous patch introduced the new FOO_KCONFIG_DEFCONFIG variable
to specify a defconfig rule rather than a (def)config file.
Add this to the manual.
Also document the pre-existing FOO_KCONFIG_FILE for which the
explanations were missing altogether.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Adds functionality to the kconfig infrastructure to merge additional
configuration fragment files to the main configuration file of
kconfig packages, using support/kconfig/merge_config.sh
Typical use-case is when you want your configuration to be
kept in sync with an upstream (def)config file, but do require
some minor local modifications.
Disables -update-config and -update-defconfig targets when
fragment files are set.
[Thomas: take into account comments made by Arnout:
- Minor fixes in the documentation changes
- Add @ before the tests done in the $(1)-update-config and
$(1)-update-defconfig targets.]
Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Gergely Imreh <imrehg@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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To be consistent with the recent change of FOO_MAKE_OPT into FOO_MAKE_OPTS,
make the same change for FOO_KCONFIG_OPT.
Sed command used:
find * -type f | xargs sed -i 's#_KCONFIG_OPT\>#&S#g'
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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While the autotools infrastructure was using FOO_MAKE_OPT, generic packages
were typically using FOO_MAKE_OPTS. This inconsistency becomes a problem
when a new infrastructure is introduced that wants to make use of
FOO_MAKE_OPT(S), and can live alongside either generic-package or
autotools-package. The new infrastructure will have to choose between either
OPT or OPTS, and thus rule out transparent usage by respectively generic
packages or generic packages. An example of such an infrastructure is
kconfig-package, which provides kconfig-related make targets.
The OPTS variant is more logical, as there are typically multiple options.
This patch renames all occurrences of FOO_MAKE_OPT in FOO_MAKE_OPTS.
Sed command used:
find * -type f | xargs sed -i 's#_MAKE_OPT\>#&S#g'
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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This patch adds documentation for the new kconfig-package infrastructure to
the manual.
Note that due to the simplicity of the infrastructure, the documentation
is not split in a 'tutorial' and a 'reference', like for the other
infrastructures. Instead, the usage is described in one section.
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
[me: slight grammar fix 'copy -back- the configuration +back+ to...']
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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