Package: libbotan-1.10-0 Version: 1.10.8-2 Severity: important Background [1]: libstdc++6 introduces a new ABI to conform to the C++11 standard, but keeps the old ABI to not break existing binaries. Packages which are built with g++-5 from experimental (not the one from testing/unstable) are using the new ABI. Libraries built from this source package export some of the new __cxx11 or B5cxx11 symbols, and dropping other symbols. If these symbols are part of the API of the library, then this rebuild with g++-5 will trigger a transition for the library.
What is needed (note: this is the standard libstdc++6 bug template with some updates/additions): - Rebuild the library using g++/g++-5 from experimental. Note that most likely all C++ libraries within the build dependencies need a rebuild too. You can find the log for a rebuild in https://people.debian.org/~doko/logs/gcc5-20150701/ Search for "BEGIN GCC CXX11" in the log. https://people.debian.org/~doko/logs/gcc5-20150701/botan1.10_1.10.8-2_unstable_gcc5.log - Decide if the symbols matching __cxx11 or B5cxx11 are part of the library API, and are used by the reverse dependencies of the library. - If there are no symbols matching __cxx11 or B5cxx11 in the symbols forming the library API, you should close this issue with a short explanation. - If there are no reverse dependencies, it should be the package maintainers decision if a transition is needed. However this might break software which is not in the Debian archive, and built against these packages. - If a library transition is needed, please prepare for the change. Rename the library package, append "v5" to the name of the package (e.g. libfoo2 -> libfoo2v5). Such a change can be avoided, if you have a soversion bump and you upload this version instead of the renamed package. Prepare a patch and attach it to this issue (mark this issue with patch), so that it is possible to NMU such a package. We'll probably have more than hundred transitions triggered. Then reassign the issue to release.debian.org and properly tag it as a transition issue, by sending an email to cont...@bugs.debian.org: user release.debian....@packages.debian.org usertag <this issue> + transition block <this issue> by 790756 reassign <this issue> release.debian.org - If unsure if a transition is needed, please tag the issue with help to ask for feedback from other Debian developers. The libstdc++6 transition will be a large one, and it will come with a lot of pain. Please help it by preparing the follow-up transitions. [1] https://wiki.debian.org/GCC5#libstdc.2B-.2B-_ABI_transition Additional information: A transition is needed. Ovito will FTBFS unless both botan1.10 and qscintilla2 are updated (I discovered this preparing the qscintilla2 transition).