Build error with GCC 8.x.y

[dmitry-trefilov]

Describe the bug
Hi all.
I have tried to build project on my local machine but it doesn't compile.

To Reproduce

$ cmake -Wdev -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DBOOST_LIBRARYDIR=G:\\_LIBS\\boost_1_70_0\\stage\\lib -DBoost_INCLUDE_DIR=G:\\_LIBS\\boost_1_70_0 -DBOOST_ROOT=G:\\_LIBS\\boost_1_70_0\\boost -DCMAKE_PREFIX_PATH=C:\\Qt\\Qt5.12.0\\5.15.0\\mingw81_64\\bin -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ ..
-- The C compiler identification is GNU 8.1.0
-- The CXX compiler identification is GNU 8.1.0
-- Check for working C compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/gcc.exe
-- Check for working C compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/gcc.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/g++.exe
-- Check for working CXX compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/g++.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Using compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/g++.exe
-- Boost static libs: ON
-- Boost multithreaded libs: ON
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Using compiler: C:/Qt/Qt5.12.0/Tools/mingw810_64/bin/g++.exe
-- Boost static libs: ON
-- Boost multithreaded libs: ON
-- Found Boost: G:\_LIBS\boost_1_70_0 (found version "1.70.0") found components: filesystem system thread chrono date_time atomic
-- x64 configuration
-- Degate version: 2.1.0-alpha.1
-- Release date: unreleased
-- Doxygen not found
-- Configuring done
-- Generating done
-- Build files have been written to: G:/personal_projects/Degate/rel_win_build

$ make -j VERBOSE=1

Expected behavior
Project should be compiled without any error.

Screenshots

In file included from C:/Qt/Qt5.12.0/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/map:60,
                 from G:/personal_projects/Degate/src/Globals.h:29,
                 from G:/personal_projects/Degate/src/Core/Image/Image.h:45,
                 from G:/personal_projects/Degate/src/Core/LogicModel/PlacedLogicModelObject.h:26,
                 from G:/personal_projects/Degate/src/Core/LogicModel/ObjectSet.h:25,
                 from G:/personal_projects/Degate/src/Core/LogicModel/ObjectSet.cc:24:
C:/Qt/Qt5.12.0/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/stl_tree.h: In instantiation of 'class std::_Rb_tree<std::shared_ptr<degate::GatePort>, std::shared_ptr<degate::GatePort>, std::_Identity<std::shared_ptr<degate::GatePort> >, degate::LMOCompare, std::allocator<std::shared_ptr<degate::GatePort> > >':
C:/Qt/Qt5.12.0/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/stl_set.h:133:17:   required from 'class std::set<std::shared_ptr<degate::GatePort>, degate::LMOCompare>'
G:/personal_projects/Degate/src/Core/LogicModel/Gate/Gate.h:60:53:   required from here
C:/Qt/Qt5.12.0/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/stl_tree.h:452:21: error: static assertion failed: comparison object must be invocable with two arguments of key type
       static_assert(__is_invocable<_Compare&, const _Key&, const _Key&>{},
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make.exe[2]: *** [CMakeFiles/DegateCore.dir/src/Core/LogicModel/ObjectSet.cc.obj] Error 1
make.exe[2]: Leaving directory `G:/personal_projects/Degate/win_build'
make.exe[1]: *** [CMakeFiles/DegateCore.dir/all] Error 2
make.exe[1]: Leaving directory `G:/personal_projects/Degate/win_build'
make.exe: *** [all] Error 2

Desktop (please complete the following information):

• OS: Win7 x64
• Version: 2.1.0-alpha.1
• GCC (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 8.1.0
• Qt 5.15.0

Additional context
Here seems to be the same error.

[DorianBDev]

Thank you for taking the time to contribute to the project! Have a nice evening :)