On Wed, Jun 23, 2021 at 9:25 AM Yaakov Selkowitz <yselk...@redhat.com> wrote:
> On Wed, 2021-06-23 at 08:56 -0700, Troy Dawson wrote: > > I'm updating/ rebuilding KDE Plasma Desktop on CentOS Stream 8, for the > > updated qt5 that is there. I am using what is in F34 for the update. > > I've got all the qt5 5.15.2 and kf5 5.83.0 packages built and in the > > buildroot. > > For libksysguard I believe I have all other dependencies built and in the > > buildroot. > > But it just keeps failing, despite everything I've tried.[1][2] > > I get the same error on all arches. The same error on version 5.22.1, > > 5.22.2 and even 5.21.4. > > I've tried passing build parameters that I thought went along with the > > error, but nothing changed. > > > > I think this is the critical error, but it's possible I'm wrong > > > > CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function > > `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone > > .localalias.209]': > > /usr/include/c++/8/bits/fs_path.h:185: undefined reference to > > `std::filesystem::__cxx11::path::_M_split_cmpts()' > > CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function > > `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone > > .localalias.209]': > > /usr/include/c++/8/bits/fs_dir.h:371: undefined reference to > > > `std::filesystem::__cxx11::directory_iterator::directory_iterator(std::filesys > > tem::__cxx11::path > > const&, std::filesystem::directory_options, std::error_code*)' > > CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function > > `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*)': > > /builddir/build/BUILD/libksysguard- > > 5.22.2.1/processcore/cgroup_data_model.cpp:447: > > undefined reference to > > `std::filesystem::__cxx11::directory_iterator::operator*() const' > > /builddir/build/BUILD/libksysguard- > > 5.22.2.1/processcore/cgroup_data_model.cpp:447: > > undefined reference to > > `std::filesystem::__cxx11::directory_iterator::operator++()' > > CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function > > `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone > > .localalias.209]': > > /usr/include/c++/8/bits/fs_dir.h:260: undefined reference to > > `std::filesystem::status(std::filesystem::__cxx11::path const&)' > > collect2: error: ld returned 1 exit status > > std::filesystem was originally added as an experimental extension to C++, > and > at first required explicitly linking with -lstdc++fs. GCC 9 removed the > requirement for the additional link library [1], but RHEL 8's default > compiler > is GCC 8. Therefore, for EPEL 8, you would have to create a patch which > adds > stdc++fs to the target_link_libraries of the processcore target. > > [1] https://gcc.gnu.org/gcc-9/changes.html > > HTH, > My cmake skills are not up to snuff. A little more help is needed. I seems -lstdc++fs needs to be added at the end of the compile command /usr/bin/c++ <options and other stuff> -lstdc++fs instead of at the beginning or middle of the options /usr/bin/c++ -lstdc++fs <options and other stuff> I can do that manually, and it compiles correctly. But getting cmake to do it, I'm clearly missing something. Is there a cmake command line option to put -lstdc++fs at the end? There are several cmake and cmake.in files. Would I put it in one, and if so, what is the syntax? Thanks Troy
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