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The code block surrounded by 'if' ... 'endif' is reduced into if_stmt,
which is accepted in the 'choice' context. Therefore, you can write any
statements within a choice block by wrapping 'if y' ... 'end'.
For example, you can create a menu inside a choice, like follows:
---------------->8----------------
choice
prompt "choice"
config A
bool "A"
config B
bool "B"
if y
menu "strange menu"
config C
bool "C"
endmenu
endif
endchoice
---------------->8----------------
I want to change such a weird structure into a syntax error.
In fact, the USB gadget Kconfig had used nested 'choice' for no good
reason until commit df8df5e4bc37 ("usb: get rid of 'choice' for
legacy gadget drivers") killed it.
I think the 'source' inside 'choice' is on the fence. It is at least
gramatically sensible as long as the included file contains only
bool/tristate configs. However, it makes the code unreadable, and people
tend to forget the fact that the file is included from the choice
block. Commit 10e5e6c24963 ("usb: gadget: move choice ... endchoice to
legacy/Kconfig") got rid of the only usecase.
Going forward, you can only use 'config', 'comment', and 'if' inside
'choice'. This also recursively applies to 'if' blocks inside 'choice'.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
struct property can reference to the symbol that it is associated with
by prop->menu->sym.
Fix up the one usage of prop->sym, and remove sym from struct property.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Now that 'prompt' is only reduced from T_WORD_QUOTE without any action,
use T_WORD_QUOTE directly.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Commit 8636a1f9677d ("treewide: surround Kconfig file paths with double
quotes") killed use-cases to reduce an unquoted string into the 'prompt'
symbol.
Kconfig still allows to use an unquoted string in the context of menu,
source, or prompt.
So, you can omit quoting if the prompt is a single word:
bool foo
..., but I do not think this is so useful.
Let's require quoting:
bool "foo"
All the Kconfig files in the kernel are written in this way.
Remove the T_WORD from the right-hand side of the symbol 'prompt'.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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>
