[Buildroot] [PATCH v2] package/lldpd: fix compilation issue with kernel 7.3 on aarch64

[Buildroot] [PATCH v2] package/lldpd: fix compilation issue with kernel 7.3 on aarch64

[Thibaut Collet]

lldpd bundles some uapi linux files for old distributions, especially
the types.h one.

Since kernel commit d4bf9e08d412 ("arm64: uapi: Use __u128 instead of
__uint128_t in UAPI headers"), the type __u128 is used by sigcontext.h.
This type is defined in types.h, but the old version bundled by lldpd
does not provide it. This lack leads to the following compilation error:

  In file included from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/bits/sigcontext.h:30,
                   from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/signal.h:301,
                   from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/sys/param.h:28,
                   from privsep_io.c:5:
  ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/asm/sigcontext.h:81:9: error: unknown type name '__u128'; did you mean '__u32'?
     81 |         __u128 vregs[32];
        |         ^~~~~~
        |         __u32

The uapi linux files bundled by lldpd are the ones of kernel 4.19
(https://github.com/lldpd/lldpd/commit/a192a2e91f81), and they are
prepended to the include path, so they shadow the sysroot ones.

Remove them so that lldpd uses the uapi files of the sysroot, but only
when the toolchain provides kernel headers 4.19 or later. With older
headers the bundled files are kept, so those configurations are left
unchanged.

Signed-off-by: Thibaut Collet <thbt.cllt@gmail.com>
---

Changes v1 -> v2:
  - Only remove the bundled headers for kernel headers >= 4.19

 package/lldpd/lldpd.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/package/lldpd/lldpd.mk b/package/lldpd/lldpd.mk
index f0cbc7e436..9ecf622b22 100644
--- a/package/lldpd/lldpd.mk
+++ b/package/lldpd/lldpd.mk
@@ -61,6 +61,13 @@ else
 LLDPD_CONF_OPTS += --without-readline
 endif
 
+ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19),y)
+define LLDPD_DROP_UAPI_FILES
+	rm -rf $(@D)/include/linux
+endef
+LLDPD_POST_PATCH_HOOKS += LLDPD_DROP_UAPI_FILES
+endif
+
 define LLDPD_INSTALL_INIT_SYSV
 	$(INSTALL) -D -m 0755 package/lldpd/S60lldpd \
 		$(TARGET_DIR)/etc/init.d/S60lldpd
-- 
2.43.0

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Re: [Buildroot] [PATCH v2] package/lldpd: fix compilation issue with kernel 7.3 on aarch64

[Vincent Jardin via buildroot]

Hi Thibaut,

> Changes v1 -> v2:
>   - Only remove the bundled headers for kernel headers >= 4.19
> 
>  package/lldpd/lldpd.mk | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/package/lldpd/lldpd.mk b/package/lldpd/lldpd.mk
> index f0cbc7e436..9ecf622b22 100644
> --- a/package/lldpd/lldpd.mk
> +++ b/package/lldpd/lldpd.mk
> @@ -61,6 +61,13 @@ else
>  LLDPD_CONF_OPTS += --without-readline
>  endif
>  
> +ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19),y)
> +define LLDPD_DROP_UAPI_FILES
> +	rm -rf $(@D)/include/linux
> +endef
> +LLDPD_POST_PATCH_HOOKS += LLDPD_DROP_UAPI_FILES
> +endif
> +

Reviewed-by: Vincent Jardin <vjardin@free.fr>
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Re: [Buildroot] [PATCH v2] package/lldpd: fix compilation issue with kernel 7.3 on aarch64

[Arnout Vandecappelle via buildroot]

On Wed, 30 Sep 2026 09:24:41 +0200, Thibaut Collet wrote:
> lldpd bundles some uapi linux files for old distributions, especially
> the types.h one.
>
> Since kernel commit d4bf9e08d412 ("arm64: uapi: Use __u128 instead of
> __uint128_t in UAPI headers"), the type __u128 is used by sigcontext.h.
> This type is defined in types.h, but the old version bundled by lldpd
> does not provide it. This lack leads to the following compilation error:
>
>   In file included from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/bits/sigcontext.h:30,
>                    from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/signal.h:301,
>                    from ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/sys/param.h:28,
>                    from privsep_io.c:5:
>   ../../../../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/asm/sigcontext.h:81:9: error: unknown type name '__u128'; did you mean '__u32'?
>      81 |         __u128 vregs[32];
>         |         ^~~~~~
>         |         __u32
>
> The uapi linux files bundled by lldpd are the ones of kernel 4.19
> (https://github.com/lldpd/lldpd/commit/a192a2e91f81), and they are
> prepended to the include path, so they shadow the sysroot ones.
>
> Remove them so that lldpd uses the uapi files of the sysroot, but only
> when the toolchain provides kernel headers 4.19 or later. With older
> headers the bundled files are kept, so those configurations are left
> unchanged.
>
> Signed-off-by: Thibaut Collet <thbt.cllt@gmail.com>

 Applied to master, thanks!

 Regards,
 Arnout

> ---
>
> Changes v1 -> v2:
>   - Only remove the bundled headers for kernel headers >= 4.19
>
>  package/lldpd/lldpd.mk | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/package/lldpd/lldpd.mk b/package/lldpd/lldpd.mk
> index f0cbc7e436..9ecf622b22 100644
> --- a/package/lldpd/lldpd.mk
> +++ b/package/lldpd/lldpd.mk
> @@ -61,6 +61,13 @@ else
>  LLDPD_CONF_OPTS += --without-readline
>  endif
>  
> +ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19),y)
> +define LLDPD_DROP_UAPI_FILES
> +	rm -rf $(@D)/include/linux
> +endef
> +LLDPD_POST_PATCH_HOOKS += LLDPD_DROP_UAPI_FILES
> +endif
> +
>  define LLDPD_INSTALL_INIT_SYSV
>  	$(INSTALL) -D -m 0755 package/lldpd/S60lldpd \
>  		$(TARGET_DIR)/etc/init.d/S60lldpd
> -- 
> 2.43.0

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