Package: debhelper Version: 13.7.1 Severity: important X-Debbugs-Cc: debian-ri...@lists.debian.org
Dear Maintainer, On riscv64, many FTBFS issues share a root cause, and I believe it would be appropriate to address it in debhelper. This architecture lacks hardware support for small atomics. These operations must be implemented in software instead of as instructions. The pthreads library includes this support, but needs to be linked with "-pthread", and not "-lpthread" to use this functionality. There is also currently a gcc bug related to this, with ongoing discussion on what to do long-term. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81358 The following cmake directive causes the build process to prefer -pthread over -lpthread, and in this case, makes it possible to use small atomic operations on riscv64. set(THREADS_PREFER_PTHREAD_FLAG ON) Rather than applying a patch for this flag to every affected package individually, it seems more sensible to apply it through debhelper. If the architecture is riscv64, then the above cmake directive should be set. I think this could be added in lib/Debian/Debhelper/Buildsystem/cmake.pm Below I have gathered several relevant lists of packages. These lists are probably incomplete. Likely affected with no patch pending: fairy-stockfish leela-zero muse neochat rust-jemalloc-sys wsclean zynaddsubfx Affected with a patch pending: simgear https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1011260 thinkfan https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1011953 warzone2100 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1011367 Affected with a patch applied: ceph https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953003 webkit2gtk https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895969 yoshimi https://sources.debian.org/src/yoshimi/2.2.0-2/debian/patches/fix_ftbfs_on_risc64.patch/ Affected with a patch applied, but does not use cmake: libzstd https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895259 Similar unfixed problem, but not currently using -lpthread (need to use -latomic): numactl opentracing-cpp tiledb-r Also, see here for existing occurrences of this cmake directive in Debian packages: https://codesearch.debian.net/search?q=THREADS_PREFER_PTHREAD_FLAG Special thanks to Bo YU <tsu.y...@gmail.com> for help in preparing this bug report. -Alan Beadle <ab.bea...@gmail.com> -- System Information: Debian Release: bookworm/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: riscv64 Kernel: Linux 5.18.0-starfive-5.18 (SMP w/2 CPU threads) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages debhelper depends on: ii autotools-dev 20220109.1 ii dh-autoreconf 20 ii dh-strip-nondeterminism 1.13.0-1 ii dpkg 1.21.8 ii dpkg-dev 1.21.8 ii dwz 0.14-1 ii file 1:5.41-4 ii libdebhelper-perl 13.7.1 ii libdpkg-perl 1.21.8 ii man-db 2.10.2-1 ii perl 5.34.0-4 ii po-debconf 1.0.21+nmu1 debhelper recommends no packages. Versions of packages debhelper suggests: pn dh-make <none> -- no debconf information
