Bug#1142533: llvm-toolchain-21: FTBFS: fatal error: 'linux/scc.h' file not found

[Adrian Bunk]

Control: tags -1 patch

On Tue, Jul 21, 2026 at 11:59:58AM +0000, Graham Inggs wrote:
> Source: llvm-toolchain-21
> Version: 1:21.1.8-7
> Severity: serious
> Tags: ftbfs
> X-Debbugs-Cc: sylvestre at debian.org, doko at debian.org
> 
> Hi Maintainer
> 
> llvm-toolchain-21 FTBFS when rebuilt against libabsl20260526 [1].
> I've copied what I hope is the relevant part of the log below.
> 
> Regards
> Graham
>...
> -c /build/reproducible-path/llvm-toolchain-21-21.1.8/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
> /build/reproducible-path/llvm-toolchain-21-21.1.8/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp:160:10:
> fatal error: 'linux/scc.h' file not found
>   160 | #include <linux/scc.h>
>       |          ^~~~~~~~~~~~~
> 1 error generated.

The attached backported commit fixes the build.

cu
Adrian
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