error: specialization of ‘template<class _Tp> struct std::default_delete’ in different namespace [-fpermissive]

[kanavin]

With older gcc versions (e.g. 6.3 in Debian 9) Yocto Project is seeing this:

| /home/pokybuild/yocto-worker/build-appliance/build/build/tmp/work/x86_64-linux/libdnf-native/0.33.0-r0/git/libdnf/sack/query.cpp:54:13: error: specialization of ‘template struct std::default_delete’ in different namespace [-fpermissive]
| struct std::default_delete {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
| In file included from /usr/include/c++/6/memory:81:0,
| from /home/pokybuild/yocto-worker/build-appliance/build/build/tmp/work/x86_64-linux/libdnf-native/0.33.0-r0/git/libdnf/sack/advisory.hpp:25,
| from /home/pokybuild/yocto-worker/build-appliance/build/build/tmp/work/x86_64-linux/libdnf-native/0.33.0-r0/git/libdnf/utils/utils.hpp:10,
| from /home/pokybuild/yocto-worker/build-appliance/build/build/tmp/work/x86_64-linux/libdnf-native/0.33.0-r0/git/libdnf/sack/query.cpp:21:
| /usr/include/c++/6/bits/unique_ptr.h:54:12: error: from definition of ‘template struct std::default_delete’ [-fpermissive]
| struct default_delete
| ^~~~~~~~~~~~~~

Full log:
https://autobuilder.yoctoproject.org/typhoon/#/builders/23/builds/850/steps/7/logs/step2b

[jrohel]

The issue was solved 0ec7608