Created attachment 531028 [details, diff] Fixes build on GCC8 The problem has already been reported to upstream, but given Google's policy on pull requests, I doubt it will be addressed in a timely manner. The build logs are as follows: [597/747] /usr/bin/x86_64-pc-linux-gnu-g++ -MMD -MF obj/engine/engine.engine.o.d -DOS_LINUX -DMOZC_BUILD -DCHANNEL_DEV -DNDEBUG -DQT_NO_DEBUG -DNO_LOGGING -DIGNORE_HELP_FLAG -DIGNORE_INVALID_FLAG -I/var/tmp/portage/app-i18n/mozc-9999/work/mozc-9999/src -Igen -Igen/proto_ out -Wall -Wno-char-subscripts -Wno-sign-compare -Wno-deprecated-declarations -Wwrite-strings -Wno-unknown-warning-option -Wno-inconsistent-missing-override -fPIC -fno-exceptions -fmessage-length=0 -fno-strict-aliasing -funsigned-char -pipe -pthread -fno-omit-frame-point er -fstack-protector --param=ssp-buffer-size=4 -Wtype-limits -march=native -O2 -pipe -Wno-deprecated -Wno-covered-switch-default -Wno-unnamed-type-template-args -Wno-c++11-narrowing -std=gnu++0x -std=gnu++0x -c ../../engine/engine.cc -o obj/engine/engine.engine.o FAILED: obj/engine/engine.engine.o /usr/bin/x86_64-pc-linux-gnu-g++ -MMD -MF obj/engine/engine.engine.o.d -DOS_LINUX -DMOZC_BUILD -DCHANNEL_DEV -DNDEBUG -DQT_NO_DEBUG -DNO_LOGGING -DIGNORE_HELP_FLAG -DIGNORE_INVALID_FLAG -I/var/tmp/portage/app-i18n/mozc-9999/work/mozc-9999/src -Igen -Igen/proto_out -Wall -Wno-char-subscripts -Wno-sign-compare -Wno-deprecated-declarations -Wwrite-strings -Wno-unknown-warning-option -Wno-inconsistent-missing-override -fPIC -fno-exceptions -fmessage-length=0 -fno-strict-aliasing -funsigned-char -pipe -pthread -fno-omit-frame-pointer -fstack -protector --param=ssp-buffer-size=4 -Wtype-limits -march=native -O2 -pipe -Wno-deprecated -Wno-covered-switch-default -Wno-unnamed-type-template-args -Wno-c++11-narrowing -std=gnu++0x -std=gnu++0x -c ../../engine/engine.cc -o obj/engine/engine.engine.o In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_algobase.h:66, from /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/memory:62, from /var/tmp/portage/app-i18n/mozc-9999/work/mozc-9999/src/engine/engine.h:33, from ../../engine/engine.cc:30: /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_iterator_base_funcs.h: In instantiation of ‘void std::__advance(_RandomAccessIterator&, _Distance, std::random_access_iterator_tag) [with _RandomAccessIterator = mozc::ZeroQueryDict::iterator; _Distance = lon g int]’: /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_iterator_base_funcs.h:206:21: required from ‘void std::advance(_InputIterator&, _Distance) [with _InputIterator = mozc::ZeroQueryDict::iterator; _Distance = long int]’ /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_algo.h:2137:16: required from ‘std::pair<_FIter, _FIter> std::__equal_range(_ForwardIterator, _ForwardIterator, const _Tp&, _CompareItTp, _CompareTpIt) [with _ForwardIterator = mozc::ZeroQueryDict::iterator ; _Tp = long unsigned int; _CompareItTp = __gnu_cxx::__ops::_Iter_less_val; _CompareTpIt = __gnu_cxx::__ops::_Val_less_iter]’ /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_algo.h:2190:32: required from ‘std::pair<_FIter, _FIter> std::equal_range(_FIter, _FIter, const _Tp&) [with _FIter = mozc::ZeroQueryDict::iterator; _Tp = long unsigned int]’ /var/tmp/portage/app-i18n/mozc-9999/work/mozc-9999/src/prediction/zero_query_dict.h:213:57: required from here /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.0/include/g++-v8/bits/stl_iterator_base_funcs.h:183:2: error: no match for ‘operator--’ (operand type is ‘mozc::ZeroQueryDict::iterator’) --__i; ^~~~~ There is a patch for this in the upstream issue report: https://github.com/google/mozc/issues/441 Applyying this patch, the build succeeds using gcc 8.1 and mozc works without any issues whatsoever. With all due credit to farseerfc, the patch is attached to this report.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a917a8214bb56d2486898553788d9764a2b26cdc commit a917a8214bb56d2486898553788d9764a2b26cdc Author: Arfrever Frehtes Taifersar Arahesis <Arfrever@Apache.Org> AuthorDate: 2018-06-01 03:02:06 +0000 Commit: Mike Gilbert <floppym@gentoo.org> CommitDate: 2018-06-13 14:36:21 +0000 app-i18n/mozc: Fix building with GCC 8. Closes: https://bugs.gentoo.org/655570 app-i18n/mozc/files/mozc-2.23.2815.102-gcc-8.patch | 22 ++++++++++++++++++++++ app-i18n/mozc/mozc-2.23.2815.102.ebuild | 1 + app-i18n/mozc/mozc-9999.ebuild | 1 + 3 files changed, 24 insertions(+)
