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2020-03-03kbuild: use KBUILD_DEFCONFIG as the fallback for DEFCONFIG_LISTMasahiro Yamada1-4/+0
Most of the Kconfig commands (except defconfig and all*config) read the .config file as a base set of CONFIG options. When it does not exist, the files in DEFCONFIG_LIST are searched in this order and loaded if found. I do not see much sense in the last two lines in DEFCONFIG_LIST. [1] ARCH_DEFCONFIG The entry for DEFCONFIG_LIST is guarded by 'depends on !UML'. So, the ARCH_DEFCONFIG definition in arch/x86/um/Kconfig is meaningless. arch/{sh,sparc,x86}/Kconfig define ARCH_DEFCONFIG depending on 32 or 64 bit variant symbols. This is a little bit strange; ARCH_DEFCONFIG should be a fixed string because the base config file is loaded before the symbol evaluation stage. Using KBUILD_DEFCONFIG makes more sense because it is fixed before Kconfig is invoked. Fortunately, arch/{sh,sparc,x86}/Makefile define it in the same way, and it works as expected. Hence, replace ARCH_DEFCONFIG with "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)". [2] arch/$(ARCH)/defconfig This file path is no longer valid. The defconfig files are always located in the arch configs/ directories. $ find arch -name defconfig | sort arch/alpha/configs/defconfig arch/arm64/configs/defconfig arch/csky/configs/defconfig arch/nds32/configs/defconfig arch/riscv/configs/defconfig arch/s390/configs/defconfig arch/unicore32/configs/defconfig The path arch/*/configs/defconfig is already covered by "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)". So, this file path is not necessary. I moved the default KBUILD_DEFCONFIG to the top Makefile. Otherwise, the 7 architectures listed above would end up with endless loop of syncconfig. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-02-04kbuild: rename hostprogs-y/always to hostprogs/always-yMasahiro Yamada1-5/+5
In old days, the "host-progs" syntax was used for specifying host programs. It was renamed to the current "hostprogs-y" in 2004. It is typically useful in scripts/Makefile because it allows Kbuild to selectively compile host programs based on the kernel configuration. This commit renames like follows: always -> always-y hostprogs-y -> hostprogs So, scripts/Makefile will look like this: always-$(CONFIG_BUILD_BIN2C) += ... always-$(CONFIG_KALLSYMS) += ... ... hostprogs := $(always-y) $(always-m) I think this makes more sense because a host program is always a host program, irrespective of the kernel configuration. We want to specify which ones to compile by CONFIG options, so always-y will be handier. The "always", "hostprogs-y", "hostprogs-m" will be kept for backward compatibility for a while. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-01-07kconfig: Add yes2modconfig and mod2yesconfig targets.Tetsuo Handa1-1/+3
Since kernel configs provided by syzbot are close to "make allyesconfig", it takes long time to rebuild. This is especially waste of time when we need to rebuild for many times (e.g. doing manual printk() inspection, bisect operations). We can save time if we can exclude modules which are irrelevant to each problem. But "make localmodconfig" cannot exclude modules which are built into vmlinux because /sbin/lsmod output is used as the source of modules. Therefore, this patch adds "make yes2modconfig" which converts from =y to =m if possible. After confirming that the interested problem is still reproducible, we can try "make localmodconfig" (and/or manually tune based on "Modules linked in:" line) in order to exclude modules which are irrelevant to the interested problem. While we are at it, this patch also adds "make mod2yesconfig" which converts from =m to =y in case someone wants to convert from =m to =y after "make localmodconfig". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-01-07kconfig: use $(PERL) in MakefileMasahiro Yamada1-1/+1
The top Makefile defines and exports the variable 'PERL'. Use it in case somebody wants to specify a particular version of perl from the command line. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-01-07kconfig: fix too deep indentation in MakefileMasahiro Yamada1-9/+9
The indentation for if ... else ... fi is too deep. Fix it. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2019-11-11kconfig: Add option to get the full help text with listnewconfigLaura Abbott1-1/+4
make listnewconfig will list the individual options that need to be set. This is useful but there's no easy way to get the help text associated with the options at the same time. Introduce a new targe 'make helpnewconfig' which lists the full help text of all the new options as well. This makes it easier to automatically generate changes that are easy for humans to review. This command also adds markers between each option for easier parsing. Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-11kbuild: Wrap long "make help" text linesGeert Uytterhoeven1-1/+2
Some "make help" text lines extend beyond 80 characters. Wrap them before an opening parenthesis, or before 80 characters. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-11kconfig: split util.c out of parser.yMasahiro Yamada1-1/+1
util.c exists both in scripts/kconfig/ and scripts/kconfig/lxdialog. Prior to commit 54b8ae66ae1a ("kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj)"), Kbuild could not pass different flags to source files with the same basename. Now that this issue was solved, you can split util.c out of parser.y and compile them independently of each other. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-09-04kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj)Masahiro Yamada1-4/+4
Kbuild provides per-file compiler flag addition/removal: CFLAGS_<basetarget>.o CFLAGS_REMOVE_<basetarget>.o AFLAGS_<basetarget>.o AFLAGS_REMOVE_<basetarget>.o CPPFLAGS_<basetarget>.lds HOSTCFLAGS_<basetarget>.o HOSTCXXFLAGS_<basetarget>.o The <basetarget> is the filename of the target with its directory and suffix stripped. This syntax comes into a trouble when two files with the same basename appear in one Makefile, for example: obj-y += foo.o obj-y += dir/foo.o CFLAGS_foo.o := <some-flags> Here, the <some-flags> applies to both foo.o and dir/foo.o The real world problem is: scripts/kconfig/util.c scripts/kconfig/lxdialog/util.c Both files are compiled into scripts/kconfig/mconf, but only the latter should be given with the ncurses flags. It is more sensible to use the relative path to the Makefile, like this: obj-y += foo.o CFLAGS_foo.o := <some-flags> obj-y += dir/foo.o CFLAGS_dir/foo.o := <other-flags> At first, I attempted to replace $(basetarget) with $*. The $* variable is replaced with the stem ('%') part in a pattern rule. This works with most of cases, but does not for explicit rules. For example, arch/ia64/lib/Makefile reuses rule_as_o_S in its own explicit rules, so $* will be empty, resulting in ignoring the per-file AFLAGS. I introduced a new variable, target-stem, which can be used also from explicit rules. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Marc Zyngier <maz@kernel.org>
2019-08-29kbuild: remove clean-dirs syntaxMasahiro Yamada1-1/+1
The only the difference between clean-files and clean-dirs is the -r option passed to the 'rm' command. You can always pass -r, and then remove the clean-dirs syntax. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-07-17kconfig: run olddefconfig instead of oldconfig after merging fragmentsMasahiro Yamada1-1/+1
'make olddefconfig' is non-interactive, so we can drop 'yes'. The behavior is equivalent. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-06-09kconfig: make arch/*/configs/defconfig the default of KBUILD_DEFCONFIGMasahiro Yamada1-0/+4
Until recently, if KBUILD_DEFCONFIG was not set by the arch Makefile, the default path arch/*/defconfig was used. The last users of the default are gone by the following commits: - Commit f3e20ad67b4c ("s390: move arch/s390/defconfig to arch/s390/configs/defconfig") - Commit 986a13769c4b ("alpha: move arch/alpha/defconfig to arch/alpha/configs/defconfig") Let's set arch/*/configs/defconfig as a new default. This saves KBUILD_DEFCONFIG for some architectures. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2019-06-09kconfig: remove always false ifeq ($(KBUILD_DEFCONFIG,) conditionalMasahiro Yamada1-3/+1
With the following two commits applied, all the arch Makefiles define KBUILD_DEFCONFIG. - Commit f3e20ad67b4c ("s390: move arch/s390/defconfig to arch/s390/configs/defconfig") - Commit 986a13769c4b ("alpha: move arch/alpha/defconfig to arch/alpha/configs/defconfig") The first conditional in the defconfig rule is always false. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-05-19kconfig: use 'else ifneq' for Makefile to improve readabilityMasahiro Yamada1-3/+1
'ifeq ... else ifneq ... endif' notation is supported by GNU Make 3.81 or later, which is the requirement for building the kernel since commit 37d69ee30808 ("docs: bump minimal GNU Make version to 3.81"). Use it to improve the readability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-05-18treewide: prefix header search paths with $(srctree)/Masahiro Yamada1-2/+2
Currently, the Kbuild core manipulates header search paths in a crazy way [1]. To fix this mess, I want all Makefiles to add explicit $(srctree)/ to the search paths in the srctree. Some Makefiles are already written in that way, but not all. The goal of this work is to make the notation consistent, and finally get rid of the gross hacks. Having whitespaces after -I does not matter since commit 48f6e3cf5bc6 ("kbuild: do not drop -I without parameter"). [1]: https://patchwork.kernel.org/patch/9632347/ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-02-13kconfig: rename zconf.y to parser.yMasahiro Yamada1-3/+4
Use a more logical name. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-02-13kconfig: rename zconf.l to lexer.lMasahiro Yamada1-3/+3
Use a more logical name. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-01-14kconfig: clean generated *conf-cfg filesMasahiro Yamada1-1/+1
I accidentally dropped '*' in the previous renaming patch. Revive it so that 'make mrproper' can clean the generated files. Fixes: d86271af6460 ("kconfig: rename generated .*conf-cfg to *conf-cfg") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-01-06kconfig: rename generated .*conf-cfg to *conf-cfgMasahiro Yamada1-18/+18
Remove the dot-prefixing since it is just a matter of the .gitignore file. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-01-06kbuild: use assignment instead of define ... endef for filechk_* rulesMasahiro Yamada1-3/+1
You do not have to use define ... endef for filechk_* rules. For simple cases, the use of assignment looks cleaner, IMHO. I updated the usage for scripts/Kbuild.include in case somebody misunderstands the 'define ... endif' is the requirement. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2018-12-28kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warningsMasahiro Yamada1-2/+2
Currently, images.c is included by qconf.cc and gconf.c. qconf.cc uses all of xpm_* arrays, but gconf.c only some of them. Hence, lots of "... defined but not used" warnings are displayed while compiling gconf.c Splitting out images.c fixes the warnings. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-12-28kconfig: split the lexer out of zconf.yMasahiro Yamada1-6/+2
Compile zconf.lex.c independently of the other files. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-12-28kconfig: split some C files out of zconf.yMasahiro Yamada1-10/+9
I want to compile each C file independently instead of including all of them from zconf.y. Split out confdata.c, expr.c, symbol.c, and preprocess.c . These are low-hanging fruits. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-02kconfig: remove silentoldconfig targetMasahiro Yamada1-8/+1
As commit 911a91c39cab ("kconfig: rename silentoldconfig to syncconfig") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-11-02kconfig: remove oldnoconfig targetMasahiro Yamada1-8/+1
As commit 312ee68752fa ("kconfig: announce removal of oldnoconfig if used") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-09-03kconfig: do not require pkg-config on make {menu,n}configMasahiro Yamada1-1/+0
Meelis Roos reported a {menu,n}config regression: "I have libncurses devel package installed in the default system location (as do 99%+ on actual developers probably) and in this case, pkg-config is useless. pkg-config is needed only when libraries and headers are installed in non-default locations but it is bad to require installation of pkg-config on all the machines where make menuconfig would be possibly run." For {menu,n}config, do not use pkg-config if it is not installed. For {g,x}config, keep checking pkg-config since we really rely on it for finding the installation paths of the required packages. Fixes: 4ab3b80159d4 ("kconfig: check for pkg-config on make {menu,n,g,x}config") Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Meelis Roos <mroos@linux.ee> Tested-by: Randy Dunlap <rdunlap@infradead.org>
2018-08-22kconfig: fix "Can't open ..." in parallel buildMasahiro Yamada1-2/+3
If you run "make menuconfig" or "make nconfig" with -j<N> option in a fresh source tree, you will see several "Can't open ..." messages: $ make -j8 menuconfig HOSTCC scripts/basic/fixdep YACC scripts/kconfig/zconf.tab.c LEX scripts/kconfig/zconf.lex.c /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: HOSTCC scripts/kconfig/lxdialog/checklist.o Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg HOSTCC scripts/kconfig/lxdialog/inputbox.o /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg UPD scripts/kconfig/.mconf-cfg /bin/sh: 1: .: Can't open scripts/kconfig/.mconf-cfg HOSTCC scripts/kconfig/lxdialog/menubox.o HOSTCC scripts/kconfig/lxdialog/textbox.o HOSTCC scripts/kconfig/lxdialog/util.o HOSTCC scripts/kconfig/lxdialog/yesno.o HOSTCC scripts/kconfig/mconf.o HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/mconf Correct dependencies to fix this problem. Fixes: 1c5af5cf9308 ("kconfig: refactor ncurses package checks for building mconf and nconf") Cc: linux-stable <stable@vger.kernel.org> # v4.18 Reported-by: Borislav Petkov <bp@suse.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Borislav Petkov <bp@suse.de>
2018-08-22kconfig: add build-only configurator targetsRandy Dunlap1-1/+10
Add build-only targets for build_menuconfig, build_nconfig, build_xconfig, and build_gconfig. (targets must end in "config" to qualify in top-level Makefile) This allows these target to be built without execution (e.g., to look for errors or warnings) and/or to be built and checked by sparse. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-15Merge tag 'kconfig-v4.19' of ↵Linus Torvalds1-10/+7
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig updates from Masahiro Yamada: - show clearer error messages where pkg-config is needed, but not installed - rename SYMBOL_AUTO to SYMBOL_NO_WRITE to reflect its semantics - create all necessary directories by Kconfig tool itself instead of Makefile - update the .config unconditionally when syncconfig is invoked - use 'include' directive instead of '-include' where include/config/{auto,tristate}.conf is mandatory - do not try to update the .config when running install targets - add .DELETE_ON_ERROR to delete partially updated files - misc cleanups and fixes * tag 'kconfig-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: remove P_ENV property type kconfig: remove unused sym_get_env_prop() function kconfig: fix the rule of mainmenu_stmt symbol init/Kconfig: Use short unix-style option instead of --longname Kbuild: Makefile.modbuiltin: include auto.conf and tristate.conf mandatory kbuild: remove auto.conf from prerequisite of phony targets kbuild: do not update config for 'make kernelrelease' kbuild: do not update config when running install targets kbuild: add .DELETE_ON_ERROR special target kbuild: use 'include' directive to load auto.conf from top Makefile kconfig: allow all config targets to write auto.conf if missing kconfig: make syncconfig update .config regardless of sym_change_count kconfig: create directories needed for syncconfig by itself kconfig: remove unneeded directory generation from local*config kconfig: split out useful helpers in confdata.c kconfig: rename file_write_dep and move it to confdata.c kconfig: fix typos in description of "choice" in kconfig-language.txt kconfig: handle format string before calling conf_message_callback() kconfig: rename SYMBOL_AUTO to SYMBOL_NO_WRITE kconfig: check for pkg-config on make {menu,n,g,x}config
2018-07-25kconfig: create directories needed for syncconfig by itselfMasahiro Yamada1-9/+6
'make syncconfig' creates some files such as include/config/auto.conf, include/generate/autoconf.h, etc. but the necessary directory creation relies on scripts/kconfig/Makefile. To make Kconfig self-contained, create directories as needed in conf_write_autoconf(). This change allows scripts/kconfig/Makefile cleanups; syncconfig can be merged into simple-targets. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-25kconfig: remove unneeded directory generation from local*configMasahiro Yamada1-1/+0
Commit 17263baf958b ("kconfig: Create include/generated for localmodconfig") added the 'mkdir' line because local{yes,mod}config ran streamline_config.pl followed by silentoldconfig at that time. Since commit 81d2bc227305 ("kconfig: invoke oldconfig instead of silentoldconfig from local*config"), no sub-directory is required. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-18kconfig: check for pkg-config on make {menu,n,g,x}configRandy Dunlap1-0/+1
Each of 'make {menu,n,g,x}config' uses (needs) pkg-config to make sure that other required files are present and to determine build flags settings, but none of these check that pkg-config itself is present. Add a check for all 4 of these targets and update Documentation/process/changes.rst to mention 'pkg-config'. Fixes kernel bugzilla #77511: https://bugzilla.kernel.org/show_bug.cgi?id=77511 Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Bjørn Forsman <bjorn.forsman@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-18kbuild: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBSLaura Abbott1-4/+4
In preparation for enabling command line LDLIBS, re-name HOST_LOADLIBES to KBUILD_HOSTLDLIBS as the internal use only flags. Also rename existing usage to HOSTLDLIBS for consistency. This should not have any visible effects. Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-06-05kbuild: Move last word of nconfig help to the previous linePetr Vorel1-2/+1
Signed-off-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-06-05kconfig: Add testconfig into make help outputPetr Vorel1-0/+1
Signed-off-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-28kconfig: drop localization supportSam Ravnborg1-39/+3
The localization support is broken and appears unused. There is no google hits on the update-po-config target. And there is no recent (5 years) activity related to the localization. So lets just drop this as it is no longer used. Suggested-by: Ulf Magnusson <ulfalizer@gmail.com> Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-28kconfig: refactor ncurses package checks for building mconf and nconfMasahiro Yamada1-34/+24
The mconf (or its infrastructure, lxdiaglog) depends on the ncurses. Move and rename check-lxdialog.sh to mconf-cfg.sh to make it work in the same way as for qconf and gconf. This commit fixes some more weirdnesses. The nconf also needs ncurses packages. HOSTLOADLIBES_nconf is set to the libraries needed for nconf, but the cflags is not explicitly set. Actually, nconf relies on the check-lxdialog.sh for the proper cflags: HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) \ -DLOCALE The code above passes the ncurses flags to all objects, even for conf, qconf, gconf. Let's pass the ncurses flags only to mconf and nconf. Currently, the presence of ncurses is not checked for nconf. Let's show a prompt like the mconf case. According to Randy's report, the shell scripts still need to carry the fallback code in case the pkg-config fails to find the ncurses packages. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-28kconfig: refactor GTK+ package checks for building gconfMasahiro Yamada1-34/+9
Refactor the package checks for gconf in the same way as for qconf. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-28kconfig: refactor Qt package checks for building qconfMasahiro Yamada1-45/+28
Currently, the necessary package checks for building qconf is surrounded by ifeq ($(MAKECMDGOALS),xconfig) ... endif. Then, Make will restart when .tmp_qtcheck is generated. To simplify the Makefile, move the scripting to a separate file, and use filechk. The shell script is executed everytime xconfig is run, but it is not a costly script. In the old code, 'pkg-config --exists' only checked Qt5Core / QtCore, but the set of necessary packages should be checked. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-04-07kbuild: add %.lex.c and %.tab.[ch] to 'targets' automaticallyMasahiro Yamada1-1/+1
Files generated by if_changed* must be added to 'targets' to include *.cmd files. Otherwise, they would be regenerated every time. The build system automatically adds objects to 'targets' where appropriate, such as obj-y, extra-y, etc. but does nothing for intermediate files. So, each Makefile needs to add them by itself. There are some common cases where objects are generated by chained rules. Lexers and parsers are compiled like follows: %.lex.o <- %.lex.c <- %.l %.tab.o <- %.tab.c <- %.y They are common patterns, so it is reasonable to take care of them in the core Makefile instead of requiring each Makefile to do so. At this moment, you cannot delete 'target += zconf.lex.c' in the Kconfig Makefile because zconf.lex.c is included from zconf.tab.c instead of being compiled separately. It should be deleted after Kconfig is more refactored. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Frank Rowand <frowand.list@gmail.com>
2018-04-07kbuild: clean up *.lex.c and *.tab.[ch] patterns from top-level MakefileMasahiro Yamada1-1/+1
Files suffixed by .lex.c, .tab.[ch] are generated lexers, parsers, respectively. Clean them up globally from the top Makefile. Some of the final host programs those lexer/parser are linked into are necessary for building external modules, but the intermediates are unneeded. They can be cleaned away by 'make clean' instead of 'make mrproper'. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Frank Rowand <frowand.list@gmail.com>
2018-04-03Merge tag 'kconfig-v4.17' of ↵Linus Torvalds1-7/+22
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig updates from Masahiro Yamada: - improve checkpatch for more precise Kconfig code checking - clarify effective selects by grouping reverse dependencies in help - do not write out '# CONFIG_FOO is not set' from invisible symbols - make oldconfig as silent as it should be - rename 'silentoldconfig' to 'syncconfig' - add unit-test framework and several test cases - warn unmet dependency of tristate symbols - make unmet dependency warnings readable, removing false positives - improve recursive include detection - use yylineno to simplify the line number tracking - misc cleanups * tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits) kconfig: use yylineno option instead of manual lineno increments kconfig: detect recursive inclusion earlier kconfig: remove duplicated file name and lineno of recursive inclusion kconfig: do not include both curses.h and ncurses.h for nconfig kconfig: make unmet dependency warnings readable kconfig: warn unmet direct dependency of tristate symbols selected by y kconfig: tests: test if recursive inclusion is detected kconfig: tests: test if recursive dependencies are detected kconfig: tests: test randconfig for choice in choice kconfig: tests: test defconfig when two choices interact kconfig: tests: check visibility of tristate choice values in y choice kconfig: tests: check unneeded "is not set" with unmet dependency kconfig: tests: test if new symbols in choice are asked kconfig: tests: test automatic submenu creation kconfig: tests: add basic choice tests kconfig: tests: add framework for Kconfig unit testing kbuild: add PYTHON2 and PYTHON3 variables kconfig: remove redundant streamline_config.pl prerequisite kconfig: rename silentoldconfig to syncconfig kconfig: invoke oldconfig instead of silentoldconfig from local*config ...
2018-03-26kconfig: tests: add framework for Kconfig unit testingMasahiro Yamada1-0/+8
Many parts in Kconfig are so cryptic and need refactoring. However, its complexity prevents us from moving forward. There are several naive corner cases where it is difficult to notice breakage. If those are covered by unit tests, we will be able to touch the code with more confidence. Here is a simple test framework based on pytest. The conftest.py provides a fixture useful to run commands such as 'oldaskconfig' etc. and to compare the resulted .config, stdout, stderr with expectations. How to add test cases? ---------------------- For each test case, you should create a subdirectory under scripts/kconfig/tests/ (so test cases are separated from each other). Every test case directory should contain the following files: - __init__.py: describes test functions - Kconfig: the top level Kconfig file for the test To do a useful job, test cases generally need additional data like input .config and information about expected results. How to run tests? ----------------- You need python3 and pytest. Then, run "make testconfig". O= option is supported. If V=1 is given, detailed logs captured during tests are displayed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-03-26kconfig: remove redundant streamline_config.pl prerequisiteUlf Magnusson1-4/+4
The local{yes,mod}config targets currently have streamline_config.pl as a prerequisite. This is redundant, because streamline_config.pl is a checked-in file with no prerequisites. Remove the prerequisite and reference streamline_config.pl directly in the recipe of the rule instead. Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-26kconfig: rename silentoldconfig to syncconfigMasahiro Yamada1-3/+10
As commit cedd55d49dee ("kconfig: Remove silentoldconfig from help and docs; fix kconfig/conf's help") mentioned, 'silentoldconfig' is a historical misnomer. That commit removed it from help and docs since it is an internal interface. If so, it should be allowed to rename it to something more intuitive. 'syncconfig' is the one I came up with because it updates the .config if necessary, then synchronize include/generated/autoconf.h and include/config/* with it. You should not manually invoke 'silentoldcofig'. Display warning if used in case existing scripts are doing wrong. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-03-26kconfig: invoke oldconfig instead of silentoldconfig from local*configMasahiro Yamada1-2/+2
The purpose of local{yes,mod}config is to arrange the .config file based on actually loaded modules. It is unnecessary to update include/generated/autoconf.h and include/config/* stuff here. They will be updated as needed during the build. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-03-26kbuild: restore autoksyms.h touch to the top MakefileMasahiro Yamada1-2/+0
Commit d3fc425e819b ("kbuild: make sure autoksyms.h exists early") moved the code that touches autoksyms.h to scripts/kconfig/Makefile with obscure reason. From Nicolas' comment [1], he did not seem to be sure about the root cause. I guess I figured it out, so here is a fix-up I think is more correct. According to the error log in the original post [2], the build failed in scripts/mod/devicetable-offsets.c scripts/mod/Makefile is descended from scripts/Makefile, which is invoked from the top-level Makefile by the 'scripts' target. To build vmlinux and/or modules, Kbuild descend into $(vmlinux-dirs). This depends on 'prepare' and 'scripts' as follows: $(vmlinux-dirs): prepare scripts Because there is no dependency between 'prepare' and 'scripts', the parallel building can execute them simultaneously. 'prepare' depends on 'prepare1', which touched autoksyms.h, while 'scripts' descends into script/, then scripts/mod/, which needs <generated/autoksyms.h> if CONFIG_TRIM_UNUSED_KSYMS. It was the reason of the race. I am not happy to have unrelated code in the Kconfig Makefile, so getting it back to the top Makefile. I removed the standalone test target because I want to use it to create an empty autoksyms.h file. Here is a little improvement; unnecessary autoksyms.h is not created when CONFIG_TRIM_UNUSED_KSYMS is disabled. [1] https://lkml.org/lkml/2016/11/30/734 [2] https://lkml.org/lkml/2016/11/30/531 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2018-01-28kconfig: Remove silentoldconfig from help and docs; fix kconfig/conf's helpMarc Herbert1-3/+4
As explained by Michal Marek at https://lkml.org/lkml/2011/8/31/189 silentoldconfig has become a misnomer. It has become an internal interface so remove it from "make help" and Documentation/ to stop confusing people using it as seen for instance at https://chromium-review.googlesource.com/835632 Don't remove it from kconfig/Makefile yet not to break any (other) tool using it. On the other hand, correct and expand its description in the help of the (internal) scripts/kconfig/conf.c Signed-off-by: Marc Herbert <marc.herbert@intel.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-25kconfig: announce removal of oldnoconfig if usedMasahiro Yamada1-0/+2
The 'oldnoconfig' is really confusing due to its counter-intuitive name. It was renamed by commit fb16d8912db5 ("kconfig: replace 'oldnoconfig' with 'olddefconfig', and keep the old name as an alias"). The 'oldnoconfig' has been kept as an alias for enough period of time, and finally I am planning to remove it. I will give people a little more time for migration. Meanwhile, the following message will be displayed if oldnoconfig is used. WARNING: "oldnoconfig" target will be removed after Linux 4.19 Please use "olddefconfig" instead, which is an alias. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-01-22kconfig: fix make xconfig when gettext is missingYaakov Selkowitz1-0/+1
The C-based config programs are properly guarded from a missing (or, currently, external) libintl.h by the HOST_EXTRACFLAGS check, but this does not help the C++-based qconf. Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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