x86_64-pc-linux-gnu-g++ -pthread -c -I. -I. -I/usr/lib64/wx/include/gtk2-unicode-3.0 -I/usr/include/wx-3.0 -D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -pipe -O2 -pipe -march=native -DVERSION=\"0.9932\" -DXS_VERSION=\"0.9932\" -fPIC "-I/usr/lib64/perl5/5.24.1/x86_64-linux-thread-multi/CORE" -D_FILE_OFFSET_BITS=64 -DWXUSINGDLL -D__WXGTK__ Constant.c In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/g++-v5/type_traits:35:0, from /usr/include/wx-3.0/wx/strvararg.h:25, from /usr/include/wx-3.0/wx/string.h:46, from /usr/include/wx-3.0/wx/memory.h:15, from /usr/include/wx-3.0/wx/object.h:19, from /usr/include/wx-3.0/wx/event.h:16, from /usr/include/wx-3.0/wx/window.h:18, from /usr/include/wx-3.0/wx/nonownedwnd.h:14, from /usr/include/wx-3.0/wx/toplevel.h:20, from /usr/include/wx-3.0/wx/dialog.h:14, from /usr/include/wx-3.0/wx/filedlg.h:18, from Constant.c:31: /usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/g++-v5/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options. #error This file requires compiler and library support \ ^ adding the option to C*FLAGS won't work around the problem as it is ignored
Are you still able to replicate this issue? This looks suspiciously like an incomplete GCC migration. If you are able to replicate, please attach a full build log, and emerge --info, as it stands there's insufficient information here to resolve this bug. Please re-open if you can provide more details.