Re: [PATCH] fix: Add toolchain fixes to linux-cip 4.4 kernel on Noble

["'Jan Kiszka' via isar-users" <isar-users@googlegroups.com>]

On 24.09.26 11:58, Aleksey Laurynovich wrote:
> On Wed, 2026-09-23 at 13:49 +0000, MOESSBAUER, Felix wrote:
>> On Wed, 2026-09-23 at 14:03 +0200, Aleksey Laurynovich wrote:
>>> Older kernel (4.4.x) has three toolchain issues on Ubuntu Noble:
>>> - dtc yylloc multiple definition (fixed by HOSTCFLAGS+=-fcommon)
>>> - ld rejects -Wl,-Bsymbolic-functions (fixed by clearing LDFLAGS)
>>> - arm64 proc.S uses deprecated .section syntax rejected by binutils
>>> 2.42
>>>   (fixed by patching to use modern 'ax' flags)
>>>
>>> The issue can be reproduced with the command:
>>> $ bitbake mc:qemuarm64-noble:linux-cip-arm64
>>>
>>> Signed-off-by: Aleksey Laurynovich <alaur@ilbers.de>
>>> ---
>>>  ...rm64-proc.S-fix-binutils-2.42-section-syntax.patch | 11
>>> +++++++++++
>>>  .../recipes-kernel/linux/linux-cip_4.4.166-cip29.bb   |  6 ++++++
>>>  2 files changed, 17 insertions(+)
>>>  create mode 100644 meta-isar/recipes-kernel/linux/files/0001-
>>> arm64-proc.S-fix-binutils-2.42-section-syntax.patch
>>>
>>> diff --git a/meta-isar/recipes-kernel/linux/files/0001-arm64-
>>> proc.S-fix-binutils-2.42-section-syntax.patch b/meta-isar/recipes-
>>> kernel/linux/files/0001-arm64-proc.S-fix-binutils-2.42-section-
>>> syntax.patch
>>> new file mode 100644
>>> index 00000000..f464ac40
>>> --- /dev/null
>>> +++ b/meta-isar/recipes-kernel/linux/files/0001-arm64-proc.S-fix-
>>> binutils-2.42-section-syntax.patch
>>> @@ -0,0 +1,11 @@
>>> +--- a/arch/arm64/mm/proc.S
>>> ++++ b/arch/arm64/mm/proc.S
>>> +@@ -152,7 +152,7 @@
>>> + alternative_endif
>>> + ENDPROC(cpu_do_switch_mm)
>>> + 
>>> +-	.section ".text.init", #alloc, #execinstr
>>> ++	.section ".text.init", "ax"
>>> + 
>>> + /*
>>> +  *	__cpu_setup
>>> diff --git a/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-
>>> cip29.bb b/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-
>>> cip29.bb
>>
>> This kernel patch release is quite old. Did you check if v4.4.302-
>> cip99
>> is also affected?
> v4.4.302-cip99 is also affected. It has ld rejects -Wl,-Bsymbolic-
> functions, and arm64 proc.S syntax problems.
> 

Then send patches upstream, not to isar, disable this inofficial
configuration, or use a (cip-)kernel that supports it. This is just an
exemplary recipe, not worth being patched.

Jan

-- 
Siemens AG, Foundational Technologies
Linux Expert Center

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