Re: [PATCH] selftests/landlock: fix broken include of linux/landlock.h

[Mickaël Salaün]

On 03/08/2022 22:13, Guillaume Tucker wrote:
> Revert part of the earlier changes to fix the kselftest build when
> using a sub-directory from the top of the tree as this broke the
> landlock test build as a side-effect when building with "make -C
> tools/testing/selftests/landlock".
>
> Reported-by: Mickaël Salaün <mic@xxxxxxxxxxx>
> Fixes: a917dd94b832 ("selftests/landlock: drop deprecated headers dependency")
> Fixes: f2745dc0ba3d ("selftests: stop using KSFT_KHDR_INSTALL")
> Signed-off-by: Guillaume Tucker <guillaume.tucker@xxxxxxxxxxxxx>
> ---
>   tools/testing/selftests/landlock/Makefile | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile
> index a6959df28eb0..02868ac3bc71 100644
> --- a/tools/testing/selftests/landlock/Makefile
> +++ b/tools/testing/selftests/landlock/Makefile
> @@ -9,10 +9,13 @@ TEST_GEN_PROGS := $(src_test:.c=)
>   TEST_GEN_PROGS_EXTENDED := true
>   
>   OVERRIDE_TARGETS := 1
> +top_srcdir := ../../../..

Not sure it changes much, but most other selftests Makefiles use 
"top_srcdir = ../../../.." (without ":="). Why this change?


>   include ../lib.mk
>   
> +khdr_dir = $(top_srcdir)/usr/include
> +
>   $(OUTPUT)/true: true.c
>   	$(LINK.c) $< $(LDLIBS) -o $@ -static
>   
> -$(OUTPUT)/%_test: %_test.c ../kselftest_harness.h common.h
> -	$(LINK.c) $< $(LDLIBS) -o $@ -lcap
> +$(OUTPUT)/%_test: %_test.c $(khdr_dir)/linux/landlock.h ../kselftest_harness.h common.h
> +	$(LINK.c) $< $(LDLIBS) -o $@ -lcap -I$(khdr_dir)