Public bug reported: This concerns libdpkg-perl 1.22.4ubuntu5 in Ubuntu noble.
In /usr/share/perl5/Dpkg/Vendor/Ubuntu.pm, there is this bit: # Debian enables -fstack-clash-protection but it causes troubles on armhf # (which are not fully analyzed as of writing this); disable it there in # order to have time to investigate if ($arch eq 'armhf') { # Stack clash protector only available on amd64 and arm. $flags->set_feature('hardening', 'stackclash', 0); } Then in /usr/share/perl5/Dpkg/Vendor/Debian.pm, this logic: # Stack clash if ($flags->use_feature('hardening', 'stackclash')) { my $flag = '-fstack-clash-protection'; $flags->append($_, $flag) foreach @compile_flags; } else { my $flag = '-fno-stack-clash-protection'; $flags->append($_, $flag) foreach @compile_flags; } Which causes -fno-stack-clash-protection to be added to the package build flags. Unfortunately, in building Chromium for armhf on noble, I see this (build log excerpt): [27780/60083] CXX obj/net/third_party/quiche/quiche/qpack_decoder_stream_receiver.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27781/60083] CXX obj/net/third_party/quiche/quiche/qpack_encoder_stream_receiver.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27782/60083] CXX obj/net/third_party/quiche/quiche/qpack_decoder_stream_sender.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27783/60083] CXX obj/net/third_party/quiche/quiche/qpack_index_conversions.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27784/60083] CXX obj/net/third_party/quiche/quiche/qpack_encoder_stream_sender.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27785/60083] CXX obj/net/third_party/quiche/quiche/qpack_encoder.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27786/60083] CXX obj/net/third_party/quiche/quiche/qpack_instruction_decoder.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27787/60083] CXX obj/net/third_party/quiche/quiche/qpack_header_table.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27788/60083] CXX obj/net/third_party/quiche/quiche/qpack_instruction_encoder.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] [27789/60083] CXX obj/net/third_party/quiche/quiche/qpack_instructions.o clang++-16: warning: argument unused during compilation: '-fno-stack-clash-protection' [-Wunused-command-line-argument] Basically, *every* invocation of the C or C++ compiler gives this warning. I think the flag needs to be dropped altogether for armhf, not just negated. ** Affects: dpkg (Ubuntu) Importance: Undecided Status: New ** Tags: noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2059059 Title: Problem with -fno-stack-clash-protection flag on armhf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/2059059/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs