Bug#984353: surf-alggeo: ftbfs with GCC-11

[Matthias Klose]

Package: src:surf-alggeo
Version: 1.0.6+ds-5
Severity: normal
Tags: sid bookworm
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-11

[This bug is not targeted to the upcoming bullseye release]

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-11/g++-11, but succeeds to build with gcc-10/g++-10. The
severity of this report will be raised before the bookworm release,
so nothing has to be done for the bullseye release.

The full build log can be found at:
http://people.debian.org/~doko/logs/20210228/filtered/gcc11/surf-alggeo_1.0.6+ds-5_unstable_gcc11.log
The last lines of the build log are at the end of this report.

To build with GCC 11, either set CC=gcc-11 CXX=g++-11 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-11/porting_to.html

GCC 11 defaults to the GNU++17 standard.  If your package installs
header files in /usr/include, please don't work around C++17 issues
by choosing a lower C++ standard for the package build, but fix these
issues to build with the C++17 standard.

[...]
../../../drawfunc/MultiVariatePolynom.h:232:9: note: because ‘Polyxyz’ has user-provided ‘Polyxyz::Polyxyz(const Polyxyz&)’
  232 |         Polyxyz(const Polyxyz& alt) : MultiPoly<MonomXYZ>(alt) {}
      |         ^~~~~~~
In file included from ../../../yaccsrc/Script.cc:68:
../../../curve/DrawCurve.h:77:30: warning: implicitly-declared ‘Polyxyz& Polyxyz::operator=(const Polyxyz&)’ is deprecated [-Wdeprecated-copy]
   77 |                         p2 = _p2;
      |                              ^~~
In file included from ../../../curve/RootFinder2d.h:30,
                 from ../../../curve/RootFinder3d.h:31,
                 from ../../../curve/DrawCurve.h:29,
                 from ../../../yaccsrc/Script.cc:68:
../../../drawfunc/MultiVariatePolynom.h:232:9: note: because ‘Polyxyz’ has user-provided ‘Polyxyz::Polyxyz(const Polyxyz&)’
  232 |         Polyxyz(const Polyxyz& alt) : MultiPoly<MonomXYZ>(alt) {}
      |         ^~~~~~~
../../../yaccsrc/Script.cc: In static member function ‘static void Script::clearScreen()’:
../../../yaccsrc/Script.cc:910:23: error: reference to ‘byte’ is ambiguous
  910 |         *intensity = (byte)(-print_background_data);
      |                       ^~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:61,
                 from /usr/include/c++/11/bits/char_traits.h:39,
                 from /usr/include/c++/11/ios:40,
                 from /usr/include/c++/11/ostream:38,
                 from /usr/include/c++/11/iostream:39,
                 from ../../../yaccsrc/Script.cc:49:
/usr/include/c++/11/bits/cpp_type_traits.h:404:30: note: candidates are: ‘enum class std::byte’
  404 |   enum class byte : unsigned char;
      |                              ^~~~
In file included from ../../../src/RgbBuffer.h:68,
                 from ../../../mt/TSDrawingArea.h:31,
                 from ../../../yaccsrc/Script.h:35,
                 from ../../../yaccsrc/Script.cc:61:
../../../src/mytypes.h:29:23: note:                 ‘typedef unsigned char byte’
   29 | typedef unsigned char byte;
      |                       ^~~~
../../../yaccsrc/Script.cc: In static member function ‘static void Script::clearPixmap()’:
../../../yaccsrc/Script.cc:939:23: error: reference to ‘byte’ is ambiguous
  939 |         *intensity = (byte)(-print_background_data);
      |                       ^~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:61,
                 from /usr/include/c++/11/bits/char_traits.h:39,
                 from /usr/include/c++/11/ios:40,
                 from /usr/include/c++/11/ostream:38,
                 from /usr/include/c++/11/iostream:39,
                 from ../../../yaccsrc/Script.cc:49:
/usr/include/c++/11/bits/cpp_type_traits.h:404:30: note: candidates are: ‘enum class std::byte’
  404 |   enum class byte : unsigned char;
      |                              ^~~~
In file included from ../../../src/RgbBuffer.h:68,
                 from ../../../mt/TSDrawingArea.h:31,
                 from ../../../yaccsrc/Script.h:35,
                 from ../../../yaccsrc/Script.cc:61:
../../../src/mytypes.h:29:23: note:                 ‘typedef unsigned char byte’
   29 | typedef unsigned char byte;
      |                       ^~~~
../../../yaccsrc/Script.cc: In static member function ‘static void Script::cutWithSurface()’:
../../../yaccsrc/Script.cc:1230:9: warning: deleting object of abstract class type ‘NewClip’ which has non-virtual destructor will cause undefined behavior [-Wdelete-non-virtual-dtor]
 1230 |         delete clip;
      |         ^~~~~~~~~~~
../../../yaccsrc/Script.cc:1282:17: warning: deleting object of abstract class type ‘NewClip’ which has non-virtual destructor will cause undefined behavior [-Wdelete-non-virtual-dtor]
 1282 |                 delete clip;
      |                 ^~~~~~~~~~~
make[3]: *** [Makefile:720: libsurf_parser_a-Script.o] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/_build/nox/yaccsrc'
make[2]: *** [Makefile:484: all-recursive] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>/_build/nox'
dh_auto_build: error: cd _build/nox && make -j1 returned exit code 2
make[1]: *** [debian/rules:34: override_dh_auto_build-arch] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:26: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2