Commit 17baab68 authored Apr 11, 2018 by Don Zickus Committed by Masahiro Yamada Apr 13, 2018

kconfig: extend output of 'listnewconfig'

We at Red Hat/Fedora have generally tried to have a per file breakdown of
every config option we set.  This makes it easy for us to add new options
when they are exposed and keep a changelog of why they were set.

A Fedora example is here:
  https://src.fedoraproject.org/cgit/rpms/kernel.git/tree/configs/fedora/generic



Using various merge scripts, we build up a config file and run it through
'make listnewconfig' and 'make oldnoconfig'.   The idea is to print out new
config options that haven't been manually set and use the default until
a patch is posted to set it properly.

To speed things up, it would be nice to make it easier to generate a
patch to post the default setting.  The output of 'make listnewconfig'
has two issues that limit us:

- it doesn't provide the default value
- it doesn't provide the new 'choice' options that get flagged in
  'oldconfig'

This patch extends 'listnewconfig' to address the above two issues.

This allows us to run a script

make listnewconfig | rhconfig-tool -o patches; git send-email patches/

The output of 'make listnewconfig':

CONFIG_NET_EMATCH_IPT
CONFIG_IPVLAN
CONFIG_ICE
CONFIG_NET_VENDOR_NI
CONFIG_IEEE802154_MCR20A
CONFIG_IR_IMON_DECODER
CONFIG_IR_IMON_RAW

The new output of 'make listnewconfig':

CONFIG_KERNEL_XZ=n
CONFIG_KERNEL_LZO=n
CONFIG_NET_EMATCH_IPT=n
CONFIG_IPVLAN=n
CONFIG_ICE=n
CONFIG_NET_VENDOR_NI=y
CONFIG_IEEE802154_MCR20A=n
CONFIG_IR_IMON_DECODER=n
CONFIG_IR_IMON_RAW=n

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

parent eea6f62b

scripts/kconfig/conf.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -422,8 +422,18 @@ static void check_conf(struct menu *menu)
		if (sym_is_changable(sym) \|\|
		(sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
		if (input_mode == listnewconfig) {
		if (sym->name && !sym_is_choice_value(sym)) {
		printf("%s%s\n", CONFIG_, sym->name);
		if (sym->name) {
		const char *str;

		if (sym->type == S_STRING) {
		str = sym_get_string_value(sym);
		str = sym_escape_string_value(str);
		printf("%s%s=%s\n", CONFIG_, sym->name, str);
		free((void *)str);
		} else {
		str = sym_get_string_value(sym);
		printf("%s%s=%s\n", CONFIG_, sym->name, str);
		}
		}
		} else {
		if (!conf_cnt++)

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