linux/scripts/kconfig
Yann E. MORIN 422c809f03 kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG
Currently, randconfig does randomise choice entries, unless KCONFIG_ALLCONFIG
is specified.

For example, given those two files (Thomas' test-case):

    ---8<--- Config.test.in
    config OPTIONA
        bool "Option A"

    choice
        prompt "This is a choice"

    config CHOICE_OPTIONA
        bool "Choice Option A"

    config CHOICE_OPTIONB
        bool "Choice Option B"

    endchoice

    config OPTIONB
        bool "Option B"
    ---8<--- Config.test.in

    ---8<--- config.defaults
    CONFIG_OPTIONA=y
    ---8<--- config.defaults

And running:
    ./scripts/kconfig/conf --randconfig Config.test.in

does properly randomise the two choice symbols (and the two booleans).

However, running:
    KCONFIG_ALLCONFIG=config.defaults \
    ./scripts/kconfig/conf --randconfig Config.test.in

does *not* reandomise the two choice entries, and only CHOICE_OPTIONA
will ever be selected. (OPTIONA will always be set (expected), and
OPTIONB will be be properly randomised (expected).)

This patch defers setting that a choice has a value until a symbol for
that choice is indeed set, so that choices are properly randomised when
KCONFIG_ALLCONFIG is set, but not if a symbol for that choice is set.

Also, as a side-efect, this patch fixes the following case:

    ---8<---
    choice
    config OPTION_A
        bool "Option A"
    config OPTION_B
        bool "Option B"
    config OPTION_C
        bool "Option C"
    endchoice
    ---8<---

which could previously generate such .config files:

    ---8<---                            ---8<---
    CONFIG_OPTION_A=y                   CONFIG_OPTION_A=y
    CONFIG_OPTION_B=y                   # CONFIG_OPTION_B is not set
    # CONFIG_OPTION_C is not set        CONFIG_OPTION_C=y
    ---8<---                            ---8<---

Ie., the first entry in a choice is always set, plus zero or one of
the other options may be set.

This patch ensures that only one option may be set for a choice.

Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Arnaud Lacombe <lacombar@gmail.com>

---
Changes v2 -> v3
  - ensure only one symbol is set in a choice

Changes v1 -> v2:
  - further postpone setting that a choice has a value until
    one is indeed set
  - do not print symbols that are part of an invisible choice
2013-04-25 00:16:12 +02:00
..
lxdialog kconfig/lxdialog: rationalise the include paths where to find {.n}curses{,w}.h 2013-04-16 22:00:32 +02:00
.gitignore kconfig: remove lkc_defs.h from .gitignore and dontdiff 2012-07-13 15:08:25 +02:00
check.sh kbuild: Fix gcc -x syntax 2012-10-03 09:03:24 +02:00
conf.c kbuild: Fix missing '\n' for NEW symbols in yes "" | make oldconfig >conf.new 2013-02-19 13:48:36 +01:00
confdata.c kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG 2013-04-25 00:16:12 +02:00
expr.c kconfig: Fix malloc handling in conf tools 2012-11-20 12:12:47 +01:00
expr.h menuconfig: Replace CIRCLEQ by list_head-style lists. 2012-10-25 15:06:00 +02:00
gconf.c kconfig: get CONFIG_ prefix from the environment 2012-11-20 11:20:08 +01:00
gconf.glade scripts/kconfig/gconf.glade Update broken web addresses. 2010-09-17 16:54:42 +02:00
images.c
kxgettext.c kconfig: nuke LKC_DIRECT_LINK cruft 2011-06-06 15:32:20 -04:00
list.h menuconfig: Add "breadcrumbs" navigation aid 2013-04-16 22:00:31 +02:00
lkc.h kconfig: Fix malloc handling in conf tools 2012-11-20 12:12:47 +01:00
lkc_proto.h menuconfig: Replace CIRCLEQ by list_head-style lists. 2012-10-25 15:06:00 +02:00
Makefile kconfig: optionally use pkg-config to detect ncurses libs 2013-03-07 00:21:11 +01:00
mconf.c menuconfig: Add "breadcrumbs" navigation aid 2013-04-16 22:00:31 +02:00
menu.c Merge branch 'kbuild/rc-fixes' into kbuild/kconfig 2013-02-25 21:51:57 +01:00
merge_config.sh merge_config.sh: Avoid creating unnessary source softlinks 2013-04-10 10:55:22 +02:00
nconf.c kconfig: nconf: rewrite labels of function keys line 2013-02-09 01:42:41 +01:00
nconf.gui.c nconf: function keys line, change background color for better readability 2013-01-24 11:43:44 +01:00
nconf.h scripts/kconfig/nconf: dynamically alloc dialog_input_result 2011-09-09 14:40:08 +02:00
POTFILES.in kconfig: gettext support for lxdialog 2008-01-28 23:14:39 +01:00
qconf.cc kconfig: fix a compiliation error when using make xconfig 2013-01-30 10:16:43 +01:00
qconf.h xconfig: Abort close if configuration cannot be saved 2011-07-25 15:50:34 +02:00
streamline_config.pl localmodconfig: Fix localyesconfig to set to 'y' not 'm' 2012-10-01 12:35:17 -04:00
symbol.c kconfig: Fix malloc handling in conf tools 2012-11-20 12:12:47 +01:00
util.c kconfig: Fix malloc handling in conf tools 2012-11-20 12:12:47 +01:00
zconf.gperf kconfig: constify `kconf_id_lookup' 2011-06-09 14:04:42 -04:00
zconf.hash.c_shipped kconfig: regen parser 2011-06-09 14:04:45 -04:00
zconf.l kconfig: Fix malloc handling in conf tools 2012-11-20 12:12:47 +01:00
zconf.lex.c_shipped kconfig: Regenerate lexer 2012-11-20 12:12:57 +01:00
zconf.tab.c_shipped Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-07-30 00:17:06 -07:00
zconf.y Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-07-30 00:17:06 -07:00