[Buildroot] [PATCH v2] package/linux-tools: selftests: Use KHDR_INCLUDES to locate the headers

[Buildroot] [PATCH v2] package/linux-tools: selftests: Use KHDR_INCLUDES to locate the headers

[Maxime Chevallier via buildroot]

Since v6.7 [1], the KHDR_DIR variable isn't used anymore by the kernel
selftest Makefiles to locate the kernel headers. Instead, KHDR_INCLUDES
is used to specify their location. It was only available between v6.5
and v6.7.

Keep KHDR_DIR for compatibility with v6.5 to v6.7 kernels, while
KHDR_INCLUDES is used by both pre 6.5 and post 6.7 kernels.

Let's pass it with the "-isystem" flag, as is done in the default values
used in the selftest makefiles.

[1]: 43e8832fed08 ("Revert "selftests: error out if kernel header files are not yet built"")

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
 package/linux-tools/linux-tool-selftests.mk.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/package/linux-tools/linux-tool-selftests.mk.in b/package/linux-tools/linux-tool-selftests.mk.in
index db7e4fa1a3..032a71e320 100644
--- a/package/linux-tools/linux-tool-selftests.mk.in
+++ b/package/linux-tools/linux-tool-selftests.mk.in
@@ -24,7 +24,8 @@ SELFTESTS_DEPENDENCIES = \
 SELFTESTS_MAKE_FLAGS = \
 	$(LINUX_MAKE_FLAGS) \
 	ARCH=$(SELFTESTS_ARCH) \
-	KHDR_DIR=$(LINUX_DIR)/usr/include
+	KHDR_DIR=$(LINUX_DIR)/usr/include \
+	KHDR_INCLUDES="-isystem $(LINUX_DIR)/usr/include"
 
 LINUX_TOOLS_BIN_ARCH_EXCLUDE += \
 	/usr/lib/kselftests/tc-testing/
-- 
2.55.0

_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot

Re: [Buildroot] [PATCH v2] package/linux-tools: selftests: Use KHDR_INCLUDES to locate the headers

[Thomas Petazzoni via buildroot]

On Sun, Oct 04, 2026 at 11:31:15PM +0200, Maxime Chevallier via buildroot wrote:
> Since v6.7 [1], the KHDR_DIR variable isn't used anymore by the kernel
> selftest Makefiles to locate the kernel headers. Instead, KHDR_INCLUDES
> is used to specify their location. It was only available between v6.5
> and v6.7.
> 
> Keep KHDR_DIR for compatibility with v6.5 to v6.7 kernels, while
> KHDR_INCLUDES is used by both pre 6.5 and post 6.7 kernels.
> 
> Let's pass it with the "-isystem" flag, as is done in the default values
> used in the selftest makefiles.
> 
> [1]: 43e8832fed08 ("Revert "selftests: error out if kernel header files are not yet built"")
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Applied to master, thanks!

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot