Bug#995045: llvm-toolchain-11: FTBFS with linux 5.14: fatal error: linux/cyclades.h: No such file or directory

[Sebastian Ramacher]

Source: llvm-toolchain-11
Version: 1:11.0.1-2
Severity: serious
Tags: ftbfs sid bookworm
Justification: fails to build from source (but built successfully in the past)
X-Debbugs-Cc: sramacher at debian.org

| [  8%] Building CXX object projects/compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cpp.o
| cd /<<PKGBUILDDIR>>/build-llvm/projects/compiler-rt/lib/sanitizer_common && /usr/bin/g++-10 -DHAVE_RPC_XDR_H=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/<<PKGBUILDDIR>>/build-llvm/projects/compiler-rt/lib/sanitizer_common -I/<<PKGBUILDDIR>>/compiler-rt/lib/sanitizer_common -I/<<PKGBUILDDIR>>/build-llvm/include -I/<<PKGBUILDDIR>>/llvm/include -I/<<PKGBUILDDIR>>/compiler-rt/lib/sanitizer_common/.. -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -Wall -std=c++14 -Wno-unused-parameter -O2 -DNDEBUG -g1  -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fvisibility=hidden -fno-lto -O3 -g -Wno-variadic-macros -Wno-non-virtual-dtor -fno-rtti -Wframe-larger-than=570 -std=c++14 -MD -MT projects/compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cpp.o -MF CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cpp.o.d -o CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cpp.o -c /<<PKGBUILDDIR>>/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
| /<<PKGBUILDDIR>>/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp:133:10: fatal error: linux/cyclades.h: No such file or directory
|   133 | #include <linux/cyclades.h>
|       |          ^~~~~~~~~~~~~~~~~~
| compilation terminated.

See
https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-11&arch=amd64&ver=1%3A11.0.1-2%2Bb1&stamp=1632526952&raw=0

Cheers
-- 
Sebastian Ramacher