Bug#1142869: llvm-toolchain-19: FTBFS: fatal error: 'linux/scc.h' file not found

Source: llvm-toolchain-19
Version: 1:19.1.7-22
Severity: serious
Tags: ftbfs
X-Debbugs-Cc: [email protected], [email protected]

Hi Maintainer

llvm-toolchain-19 FTBFS when rebuilt against libabsl20260526 [1].
I've copied what I hope is the relevant part of the log below.

Regards
Graham


[1] https://buildd.debian.org/status/package.php?p=llvm-toolchain-19


FAILED: [code=1]
compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.i386.dir/sanitizer_platform_limits_posix.cpp.o
/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/bin/clang++
--target=x86_64-pc-linux-gnu -DHAVE_RPC_XDR_H=0
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-I/build/reproducible-path/llvm-toolchain-19-19.1.7/compiler-rt/lib/sanitizer_common/..
-I/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/include
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection
-Wno-unused-command-line-argument -Wdate-time -D_FORTIFY_SOURCE=2
-fPIC -fno-semantic-interposition -fvisibility-inlines-hidden
-Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra
-Wno-unused-parameter -Wwrite-strings -Wcast-qual
-Wmissing-field-initializers -Wimplicit-fallthrough
-Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor
-Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion
-Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color
-ffunction-sections -fdata-sections
-fdebug-prefix-map=/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/runtimes/runtimes-bins=../../../
-fdebug-prefix-map=/build/reproducible-path/llvm-toolchain-19-19.1.7/=
-no-canonical-prefixes
-ffile-prefix-map=/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/runtimes/runtimes-bins=../../../
-ffile-prefix-map=/build/reproducible-path/llvm-toolchain-19-19.1.7/=
-no-canonical-prefixes -Wall -Wno-unused-parameter -O3 -DNDEBUG
-std=c++17 -m32 -fPIC -fno-builtin -fno-exceptions
-fomit-frame-pointer -funwind-tables -fno-stack-protector
-fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety
-Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only
-Wno-gnu -Wno-variadic-macros -Wno-c99-extensions
-ftrivial-auto-var-init=pattern -nostdinc++ -Wno-format -fno-rtti
-Wframe-larger-than=570 -Wglobal-constructors -MD -MT
compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.i386.dir/sanitizer_platform_limits_posix.cpp.o
-MF compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.i386.dir/sanitizer_platform_limits_posix.cpp.o.d
-o compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.i386.dir/sanitizer_platform_limits_posix.cpp.o
-c /build/reproducible-path/llvm-toolchain-19-19.1.7/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
/build/reproducible-path/llvm-toolchain-19-19.1.7/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp:154:10:
fatal error: 'linux/scc.h' file not found
  154 | #include <linux/scc.h>
      |          ^~~~~~~~~~~~~
1 error generated.