[PATCH AUTOSEL 5.10 23/23] kconfig: fix failing to generate auto.conf

Sasha Levin
2022-02-15T15:35:18Z

From: Jing Leng <jleng@ambarella.com>

[ Upstream commit 1b9e740a81f91ae338b29ed70455719804957b80 ]

When the KCONFIG_AUTOCONFIG is specified (e.g. export \
KCONFIG_AUTOCONFIG=output/config/auto.conf), the directory of
include/config/ will not be created, so kconfig can't create deps
files in it and auto.conf can't be generated.

Signed-off-by: Jing Leng <jleng@ambarella.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
scripts/kconfig/confdata.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index a39d93e3c6ae8..867b06c6d2797 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -968,14 +968,19 @@ static int conf_write_dep(const char *name)

static int conf_touch_deps(void)
{
- const char *name;
+ const char *name, *tmp;
struct symbol *sym;
int res, i;

- strcpy(depfile_path, "include/config/");
- depfile_prefix_len = strlen(depfile_path);
-
name = conf_get_autoconfig_name();
+ tmp = strrchr(name, '/');
+ depfile_prefix_len = tmp ? tmp - name + 1 : 0;
+ if (depfile_prefix_len + 1 > sizeof(depfile_path))
+ return -1;
+
+ strncpy(depfile_path, name, depfile_prefix_len);
+ depfile_path[depfile_prefix_len] = 0;
+
conf_read_simple(name, S_DEF_AUTO);
sym_calc_value(modules_sym);

--
2.34.1