Files
linux/lib
Masahiro Yamada 9c6b7fbbd7 fortify: use if_changed_dep to record header dependency in *.cmd files
After building with CONFIG_FORTIFY_SOURCE=y, many .*.d files are left
in lib/test_fortify/ because the compiler outputs header dependencies
into *.d without fixdep being invoked.

When compiling C files, if_changed_dep should be used so that the
auto-generated header dependencies are recorded in .*.cmd files.

Currently, if_changed is incorrectly used, and only two headers are
hard-coded in lib/Makefile.

In the previous patch version, the kbuild test robot detected new errors
on GCC 7.

GCC 7 or older does not produce test.d with the following test code:

 $ echo 'void b(void) __attribute__((__error__(""))); void a(void) { b(); }' |
   gcc -Wp,-MMD,test.d -c -o /dev/null -x c -

Perhaps, this was a bug that existed in older GCC versions.

Skip the tests for GCC<=7 for now, as this will be eventually solved
when we bump the minimal supported GCC version.

Link: https://lore.kernel.org/oe-kbuild-all/CAK7LNARmJcyyzL-jVJfBPi3W684LTDmuhMf1koF0TXoCpKTmcw@mail.gmail.com/T/#m13771bf78ae21adff22efc4d310c973fb4bcaf67
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240727150302.1823750-4-masahiroy@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
2024-08-15 09:26:02 -07:00
..
2024-07-12 16:39:53 -07:00
2024-02-01 13:06:40 +01:00
2022-03-07 12:48:35 -07:00
2021-08-19 09:02:55 +09:00
2024-04-25 21:07:06 -07:00
2023-02-02 22:50:01 -08:00
2023-02-02 22:50:01 -08:00
2022-03-07 12:48:35 -07:00
2022-04-29 14:38:01 -07:00
2022-10-03 14:03:21 -07:00
2021-08-19 09:02:55 +09:00
2024-06-25 17:15:06 -07:00
2024-04-25 21:07:05 -07:00
2023-08-21 13:46:25 -07:00
2023-04-17 18:01:23 +02:00
2021-07-08 11:48:20 -07:00
2023-10-16 12:44:06 -04:00
2023-08-24 16:20:18 -07:00
2023-10-16 12:44:06 -04:00
2022-10-03 17:34:32 -07:00
2024-07-04 23:43:10 -07:00
2021-07-08 11:48:20 -07:00
2024-02-15 12:17:28 -05:00
2024-02-20 20:47:32 -08:00
2021-06-18 11:43:09 +02:00
2024-06-10 11:14:52 +01:00