kernel/linux.git/usr/include/Makefile, branch master

kbuild: uapi: also test UAPI headers against C++ compilers

2026-03-25T12:24:42+00:00

C++ language requirements differ from those of C. Also test the headers against C++ compilers to make sure no errors creep in accidentally. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-5-35d6d0ed863f@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: handle UML in architecture-specific exclusion lists

2026-03-25T12:24:41+00:00

When building User Mode Linux SRCARCH is set to 'um', while the actual underlying architecture is provided in HEADER_ARCH. Allow the exclusion lists to work on UML by comparing against HEADER_ARCH when that is available. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-3-35d6d0ed863f@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: move all include path flags together

2026-03-25T12:24:40+00:00

The argument to add the root of the UAPI header tree to the include path is separated from the other arguments concerning the include path. Move all include path arguments together for more consistency and balanced line lengths. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-2-35d6d0ed863f@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: move some compiler arguments out of the command definition

2026-03-25T12:24:40+00:00

Simplify the definition of cmd_hdrtest by moving some of it to a new variable. This will both enable the upcoming reuse of those flags and also the extension of cmd_hdrtest. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-1-35d6d0ed863f@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: simplify libc dependency logic

2026-03-12T11:48:08+00:00

The only left user of the condition inverts it. Invert the condition completely and simplify its user. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-8-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: use custom stub headers instead of libc ones

2026-03-12T11:48:08+00:00

Now that custom stub headers are provided for all libc headers used from the UAPI headers, the dependency on the toolchain libc can be dropped. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-7-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: only use dummy-include for headers which use libc

2026-03-12T11:48:08+00:00

The headers which do not rely on libc are using built using -nostdinc. For them the dummy headers are pointless. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-5-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: completely exclude linux/bpf_perf_event.h on nios2

2026-03-12T11:48:07+00:00

This header is actually not buildable on nios. As nobody built nios2 with CONFIG_CC_CAN_LINK=y so far, this produced no errors. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-4-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: deduplicate linux/bpf_perf_event.h exclusions

2026-03-12T11:48:07+00:00

This header is excluded for multiple architectures. Use a single exclusion for all of them. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-3-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier

kbuild: uapi: test linux/bpf_perf_event.h on powerpc

2026-03-12T11:48:07+00:00

This header works now, so test it. Signed-off-by: Thomas Weißschuh Reviewed-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Nicolas Schier Acked-by: Arnd Bergmann Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-2-c17de0d19776@weissschuh.net Signed-off-by: Nicolas Schier