reassign 897852 src:pangomm
quit
Hi,
I think this is a pangomm bug - see the errors below about incompatible
function type casts.
I was misled by the final error message, but actually, that's because
the autoconfery for rsbackup does:
# 1. Glibmm uses C++14 features
# 2. Which Clang moans about even in gnu++11 mode.
# 3. But you can disable the moan with a -Wno... option.
# 4. But GCC errors if it encounters some _other_ warning.
#
# 2 and 4 are probably bugs. Anyway the fix is:
AC_CACHE_CHECK([whether Glibmm uses features from the future],
[rjk_cv_glibmm_future],
[save_CXXFLAGS="${CXXFLAGS}"
CXXFLAGS="${CXXFLAGS} ${rjk_cv_pangomm_cflags}"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <glibmm/object.h>]])],
[rjk_cv_glibmm_future=no],
[rjk_cv_glibmm_future=yes])
CXXGLAGS="${save_CXXFLAGS}"
])
if test $rjk_cv_glibmm_future = yes; then
CXXFLAGS="${CXXFLAGS} -Wno-c++14-extensions"
fi
And you can see in the build log:
checking whether Glibmm uses features from the future... yes
...but I think in fact what happened is that the compile failed
(probably due to the function cast that gcc complains about here), and
that causes the build to append the -Wno-C++14-extensions argument.
But the package would have FTBFS anyway, because of the pangomm error,
hence my reassigning this bug.
In file included from /usr/include/sigc++-2.0/sigc++/sigc++.h:104,
from /usr/include/pangomm-1.4/pangomm/layout.h:7,
from Render.h:23,
from Render.cc:16:
/usr/include/sigc++-2.0/sigc++/signal.h: In static member function ‘static
sigc::internal::signal_emit0<void, sigc::nil>::result_type
sigc::internal::signal_emit0<void, sigc::nil>::emit(sigc::internal::signal_impl*)’:
/usr/include/sigc++-2.0/sigc++/signal.h:798:56: error: cast between incompatible
function types from ‘sigc::internal::hook’ {aka ‘void* (*)(void*)’} to
‘sigc::internal::signal_emit0<void, sigc::nil>::call_type’ {aka ‘void
(*)(sigc::internal::slot_rep*)’} [-Werror=cast-function-type]
(reinterpret_cast<call_type>(slot.rep_->call_))(slot.rep_);
^
/usr/include/sigc++-2.0/sigc++/signal.h: In static member function ‘static
sigc::internal::signal_emit0<void, sigc::nil>::result_type
sigc::internal::signal_emit0<void,
sigc::nil>::emit_reverse(sigc::internal::signal_impl*)’:
/usr/include/sigc++-2.0/sigc++/signal.h:825:55: error: cast between incompatible
function types from ‘sigc::internal::hook’ {aka ‘void* (*)(void*)’} to
‘sigc::internal::signal_emit0<void, sigc::nil>::call_type’ {aka ‘void
(*)(sigc::internal::slot_rep*)’} [-Werror=cast-function-type]
(reinterpret_cast<call_type>(it->rep_->call_))(it->rep_);
^
At global scope:
cc1plus: error: unrecognized command line option ‘-Wno-c++14-extensions’
[-Werror]
cc1plus: all warnings being treated as errors
Sorry, I should have looked at this sooner.
Regards,
Matthew
