On Thu, Jan 11, 2024 at 1:16 PM John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de> wrote: > > the bug is definitely still present and I'm therefore not sure whether > downgrading the priority to normal is justified. > > On ppc64, cmake still crashes regularly when configuring the LLVM build > for example [1]: > > -- Looking for pow in m - found > -- Looking for pthread_create in pthread > -- Looking for pthread_create in pthread - found > -- Looking for backtrace in execinfo > Segmentation fault > > I have performed a local LLVM test build and obtained a backtrace with gdb > which also indicates a crash in libuv: > > Program terminated with signal SIGSEGV, Segmentation fault. > #0 0x0000000000000000 in ?? () > [Current thread is 1 (Thread 0x7fff811f6e60 (LWP 2635470))] > (gdb) bt > #0 0x0000000000000000 in ?? () > #1 <signal handler called> > #2 0x00007fff82eee784 in __GI_epoll_pwait (epfd=4, events=0x7fffd3808cc8, > maxevents=1024, timeout=-1, set=0x0) at > ../sysdeps/unix/sysv/linux/epoll_pwait.c:40 > #3 0x00007fff83545238 in uv__io_poll (loop=0x10015e8edd0, timeout=-1) at > ./src/unix/linux.c:1365 > #4 0x00007fff8352aa84 in uv_run (loop=0x10015e8edd0, mode=UV_RUN_ONCE) at > ./src/unix/core.c:447 > #5 0x0000000132669d8c in cmExecuteProcessCommand (args=..., status=...) at > ./Source/cmExecuteProcessCommand.cxx:358 > #6 0x0000000132561d38 in InvokeBuiltinCommand (status=..., args=..., > command=@0x133045248: 0x1326682b0 > <cmExecuteProcessCommand(std::vector<std::__cxx11::basic_string<char, > std::char_traits<char>, > std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, > std::char_traits<char>, std::allocator<char> > > > const&, > cmExecutionStatus&)>) > at ./Source/cmState.cxx:420 > #7 operator() (status=..., args=..., __closure=<optimized out>) at > ./Source/cmState.cxx:430 > #8 std::__invoke_impl<bool, cmState::AddBuiltinCommand(const std::string&, > BuiltinCommand)::<lambda(const std::vector<cmListFileArgument>&, > cmExecutionStatus&)>&, const > std::vector<cmListFileArgument, std::allocator<cmListFileArgument> >&, > cmExecutionStatus&> (__f=...) at /usr/include/c++/13/bits/invoke.h:61 > #9 std::__invoke_r<bool, cmState::AddBuiltinCommand(const std::string&, > BuiltinCommand)::<lambda(const std::vector<cmListFileArgument>&, > cmExecutionStatus&)>&, const std::vector<cmListFileArgument, > std::allocator<cmListFileArgument> >&, cmExecutionStatus&> (__fn=...) at > /usr/include/c++/13/bits/invoke.h:114 > #10 std::_Function_handler<bool(const std::vector<cmListFileArgument, > std::allocator<cmListFileArgument> >&, cmExecutionStatus&), > cmState::AddBuiltinCommand(const std::string&, > BuiltinCommand)::<lambda(const std::vector<cmListFileArgument, > std::allocator<cmListFileArgument> >&, cmExecutionStatus&)> > >::_M_invoke(const std::_Any_data &, const std::vector<cmListFileArgument, > std::allocator<cmListFileArgument> > &, cmExecutionStatus &) (__functor=..., > __args#0=..., __args#1=...) at /usr/include/c++/13/bits/std_function.h:290 > > This bug has also been reported for openSUSE [2] and Simon Lees at SUSE said > he > would be looking into it. In case he comes up with a solution, I will report > it > here. > > > [1] > > https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-17&arch=ppc64&ver=1%3A17.0.6-4%2Bb2&stamp=1704985815&raw=0 > > [2] https://bugzilla.suse.com/show_bug.cgi?id=1218365
It may be a good idea to give the CMake folks the first chance at the fix. It does not look like it has been reported to them: <https://gitlab.kitware.com/cmake/cmake/-/issues>. Searching with 'ppc' and 'llvm' tags returned 0 hits: <https://gitlab.kitware.com/cmake/cmake/-/issues/?sort=created_date&state=all&search=ppc&search=llvm>. (Maybe I missed it in their bug tracker). Jeff
