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| author |   Ulf Magnusson <ulfalizer@gmail.com> | 2017-10-04 01:25:46 +0200 |
|---|---|---|
| committer |   Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-12-07 23:45:51 +0900 |
| commit | 2c37e08464a8500b69a6c0be18d159bd1a312620 (patch) | |
| tree | 61a30648ff116674beb405316712d797ddb93a5f /scripts/kconfig/menu.c | |
| parent | Linux 4.15-rc2 (diff) | |
| download | linux-dev-2c37e08464a8500b69a6c0be18d159bd1a312620.tar.xz linux-dev-2c37e08464a8500b69a6c0be18d159bd1a312620.zip | |
kconfig: Warn if choice default is not in choice
This will catch mistakes like in the following real-world example, where
a "CONFIG_" prefix snuck in, making an undefined symbol the default:
choice
prompt "Compiler optimization level"
default CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
config CC_OPTIMIZE_FOR_PERFORMANCE
...
config CC_OPTIMIZE_FOR_SIZE
...
endchoice
This now prints the following warning:
init/Kconfig:1036:warning: choice default symbol 'CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE' is not contained in the choice
Cases where the default symbol belongs to the wrong choice are also
detected.
(The mistake is harmless here: Since the default symbol is not visible,
the choice falls back on using the first visible symbol as the default,
which is CC_OPTIMIZE_FOR_PERFORMANCE, as intended.)
Discovered while playing around with Kconfiglib
(https://github.com/ulfalizer/Kconfiglib).
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/kconfig/menu.c')
| -rw-r--r-- | scripts/kconfig/menu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c index e9357931b47d..ce88de89f146 100644 --- a/scripts/kconfig/menu.c +++ b/scripts/kconfig/menu.c @@ -252,6 +252,16 @@ static void sym_check_prop(struct symbol *sym) "'%s': number is invalid", sym->name); } + if (sym_is_choice(sym)) { + struct property *choice_prop = + sym_get_choice_prop(sym2); + + if (!choice_prop || + prop_get_symbol(choice_prop) != sym) + prop_warn(prop, + "choice default symbol '%s' is not contained in the choice", + sym2->name); + } break; case P_SELECT: case P_IMPLY: |