Bug#853691: ucommon: ftbfs with GCC-7

[Matthias Klose]

Package: src:ucommon
Version: 7.0.0-9
Severity: normal
Tags: sid buster
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-7

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-7/g++-7, but succeeds to build with gcc-6/g++-6. The
severity of this report may be raised before the buster release.
There is no need to fix this issue in time for the stretch release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc7-20170126/ucommon_7.0.0-9_unstable_gcc7.log
The last lines of the build log are at the end of this report.

To build with GCC 7, either set CC=gcc-7 CXX=g++-7 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

Common build failures are new warnings resulting in build failures with
-Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-7/porting_to.html

[...]
 /usr/bin/install -c -m 644 ucommon-config.1 commoncpp-config.1 '/<<PKGBUILDDIR>>/debian/tmp/usr/share/man/man1'
make[3]: Leaving directory '/<<PKGBUILDDIR>>'
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
   dh_install
   debian/rules override_dh_installdocs
make[1]: Entering directory '/<<PKGBUILDDIR>>'
dh_installdocs --exclude=.map --exclude=.md5
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
   dh_installchangelogs
   dh_installman
   dh_perl
   dh_link
   dh_strip_nondeterminism
   dh_compress
   dh_fixperms
   debian/rules override_dh_strip
make[1]: Entering directory '/<<PKGBUILDDIR>>'
dh_strip --dbgsym-migration='libucommon8-dbg (<< 7.0.0-7~)'
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
   dh_makeshlibs
dpkg-gensymbols: warning: some new symbols appeared in the symbols file: see diff output below
dpkg-gensymbols: warning: some symbols or patterns disappeared in the symbols file: see diff output below
dpkg-gensymbols: warning: debian/libucommon8/DEBIAN/symbols doesn't match completely debian/libucommon8.symbols
--- debian/libucommon8.symbols (libucommon8_7.0.0-9_amd64)
+++ dpkg-gensymbolsStKnGU	2017-01-27 13:04:02.508000000 +0000
@@ -14,6 +14,8 @@
  (c++)"VTT for ost::TTYStream at Base" 7.0.0
  (c++)"VTT for ost::ThreadQueue at Base" 7.0.0
  (c++)"VTT for ost::ttystream at Base" 7.0.0
+ _ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EE17_M_realloc_insertIJRKS5_EEEvN9__gnu_cxx17__normal_iteratorIPS5_S7_EEDpOT_ at Base 7.0.0-9
+ _ZNSt6vectorIPN3ost13PersistObjectESaIS2_EE17_M_realloc_insertIJRKS2_EEEvN9__gnu_cxx17__normal_iteratorIPS2_S4_EEDpOT_ at Base 7.0.0-9
  (c++)"non-virtual thunk to ost::AppLog::~AppLog()@Base" 7.0.0
  (c++)"non-virtual thunk to ost::SerialService::~SerialService()@Base" 7.0.0
  (c++)"non-virtual thunk to ost::SharedMemPager::~SharedMemPager()@Base" 7.0.0
@@ -900,8 +902,8 @@
  (c++)"virtual thunk to ost::TTYStream::~TTYStream()@Base" 7.0.0
  (c++)"virtual thunk to ost::ThreadQueue::~ThreadQueue()@Base" 7.0.0
  (c++)"virtual thunk to ost::ttystream::~ttystream()@Base" 7.0.0
- (c++)"void std::vector<ost::PersistObject*, std::allocator<ost::PersistObject*> >::_M_emplace_back_aux<ost::PersistObject* const&>(ost::PersistObject* const&)@Base" 7.0.0
- (c++|optional=templinst)"void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_emplace_back_aux<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@Base" 7.0.0
+#MISSING: 7.0.0-9# (c++)"void std::vector<ost::PersistObject*, std::allocator<ost::PersistObject*> >::_M_emplace_back_aux<ost::PersistObject* const&>(ost::PersistObject* const&)@Base" 7.0.0
+#MISSING: 7.0.0-9# (c++|optional=templinst)"void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_emplace_back_aux<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@Base" 7.0.0
  (c++)"vtable for ost::AppLog at Base" 7.0.0
  (c++)"vtable for ost::AppLogException at Base" 7.0.0
  (c++)"vtable for ost::Assoc at Base" 7.0.0
dh_makeshlibs: failing due to earlier errors
debian/rules:11: recipe for target 'binary' failed
make: *** [binary] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2