If this function fails to touch a dummy header due to missing parent
directory, then it creates it and touches the file again.

This was needed because CONFIG_FOO_BAR was previously tracked by
include/config/foo/bar.h. (include/config/foo/ may not exist here)

This is no longer the case since commit 0e0345b77ac4 ("kbuild: redo
fake deps at include/config/*.h"); now all the fake headers are placed
right under include/config/, like include/config/FOO_BAR.

Do not try to create parent directory, include/config/, which already
exists.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

The if ... else inside the for-loop is unneeded because one empty
line is placed after printing the last element of deps_config.

Currently, all errors in conf_write_dep() are ignored. Add proper
error checks.

Rename it to conf_write_autoconf_cmd(), which is more intuitive.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

This function does similar for auto.conf and autoconf.h

Create __conf_write_autoconf() helper to factor out the common code.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

For consistency with conf_get_autoconfig_name()

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Now that sym_escape_string_value() is only used in confdata.c
it can be a 'static' function.

Rename it escape_string_value() because it is agnostic about
(struct sym *).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

We can reuse __print_symbol() helper to print symbols for listnewconfig.
Only the difference is the format for "n" symbols.

This prints "CONFIG_FOO=n" instead of "# CONFIG_FOO is not set".

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

I do not think 'struct conf_printer' is so useful.

Add simple functions, print_symbol_for_*() to write out one symbol.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

All the call sites of conf_write_heading() pass NULL to the third
argument, and it is not used in the function.

Also, the print_comment hooks are doing much more complex than
needed.

Rewrite the code.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

sym_escape_string_value() returns a malloc'ed memory, but as
(const char *). So, it must be casted to (void *) when it is free'd.
This is odd.

The return type of sym_escape_string_value() should be (char *).

I exploited that free(NULL) has no effect.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Pull Kconfig updates from Masahiro Yamada:

 - Change 'option defconfig' to the environment variable
   KCONFIG_DEFCONFIG_LIST

 - Refactor tinyconfig without using allnoconfig_y

 - Remove 'option allnoconfig_y' syntax

 - Change 'option modules' to 'modules'

 - Do not use /boot/config-* etc. as base config for cross-compilation

 - Fix a search bug in nconf

 - Various code cleanups

* tag 'kconfig-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
  kconfig: refactor .gitignore
  kconfig: highlight xconfig 'comment' lines with '***'
  kconfig: highlight gconfig 'comment' lines with '***'
  kconfig: gconf: remove unused code
  kconfig: remove unused PACKAGE definition
  kconfig: nconf: stop endless search loops
  kconfig: split menu.c out of parser.y
  kconfig: nconf: refactor in print_in_middle()
  kconfig: nconf: remove meaningless wattrset() call from show_menu()
  kconfig: nconf: change set_config_filename() to void function
  kconfig: nconf: refactor attributes setup code
  kconfig: nconf: remove unneeded default for menu prompt
  kconfig: nconf: get rid of (void) casts from wattrset() calls
  kconfig: nconf: fix NORMAL attributes
  kconfig: mconf,nconf: remove unneeded '\0' termination after snprintf()
  kconfig: use /boot/config-* etc. as DEFCONFIG_LIST only for native build
  kconfig: change sym_change_count to a boolean flag
  kconfig: nconf: fix core dump when searching in empty menu
  kconfig: lxdialog: A spello fix and a punctuation added
  kconfig: streamline_config.pl: Couple of typo fixes
  ...