Hi Gaudenz On Mon, 19 Nov 2018 at 07:51 Gaudenz Steinlin <gaud...@debian.org> wrote: [...]
> I did the same and the build hanged as well. Retrying the hanging > call with all the -O2 arguments removed succeeds. So this seems to > be a bug in GCC with optimizations. I'm unsure on how to proceeed > from here. It's quite clear this is not a bug in Ceph. Is there a > chance that GCC will get fixed in stable? Would it make sense to > open a bug on g++-6? To workaround this in Ceph I would need to > find a way to disable optimizations just for this file on i386. > Because I suspect that generally disabling -O2 would have some > performance implications. > > The failing call is: > /usr/lib/gcc/i686-linux-gnu/6/cc1plus -quiet -I . -I ./include > -imultiarch i386-linux-gnu -D_GNU_SOURCE -D ROCKSDB_PLATFORM_POSIX > -D ROCKSDB_LIB_IO_POSIX -D _LARGEFILE64_SOURCE -D OS_LINUX -D > ROCKSDB_FALLOCATE_PRESENT -D SNAPPY -D ZLIB -D BZIP2 -D > ROCKSDB_MALLOC_USABLE_SIZE -D ROCKSDB_PTHREAD_ADAPTIVE_MUTEX -D > ROCKSDB_BACKTRACE -D ROCKSDB_RANGESYNC_PRESENT -D NDEBUG -isystem > ./third-party/gtest-1.7.0/fused-src monitoring/statistics.cc > -quiet -dumpbase statistics.cc -momit-leaf-frame-pointer > -mtune=generic -march=i686 -auxbase-strip monitoring/statistics.o > -g -g1 -g -g -g1 -g -g1 -O2 -O2 -O2 -O2 -Wformat=1 > -Werror=format-security -Wextra -Wall -Wsign-compare -Wshadow > -Wno-unused-parameter -Wformat=1 -Werror=format-security > -Wformat=1 -Werror=format-security -Woverloaded-virtual > -Wnon-virtual-dtor -Wno-missing-field-initializers -std=c++11 > -fdebug-prefix-map=/home/gaudenz/ceph=. -fstack-protector-strong > -fPIC -fdebug-prefix-map=/home/gaudenz/ceph=. > -fstack-protector-strong -fdebug-prefix-map=/home/gaudenz/ceph=. > -fstack-protector-strong -fno-builtin-memcmp > -fno-omit-frame-pointer -o /tmp/ccWWcwWO.s > > Running in src/rocksdb. https://git.launchpad.net/~ubuntu-server-dev/ubuntu/+source/ceph/tree/debian/patches?h=ubuntu/xenial I think I hit the same issue in Ubuntu a while back for which I picked 3 rocksdb patches - see above URL - 000*.patch. HTH (and I really need to work towards re-sync between Ubuntu and Debian). James
