Build log
-------------- Build: Release in testgtkmm (compiler: GNU GCC Compiler)---------------
x86_64-w64-mingw32-g++.exe -Wall -mms-bitfields -pthread -mms-bitfields -IC:/msys64/mingw64/include/gtkmm-3.0 -IC:/msys64/mingw64/lib/gtkmm-3.0/include -IC:/msys64/mingw64/include/atkmm-1.6 -IC:/msys64/mingw64/include/gdkmm-3.0 -IC:/msys64/mingw64/lib/gdkmm-3.0/include -IC:/msys64/mingw64/include/giomm-2.4 -IC:/msys64/mingw64/lib/giomm-2.4/include -IC:/msys64/mingw64/include/pangomm-1.4 -IC:/msys64/mingw64/lib/pangomm-1.4/include -IC:/msys64/mingw64/include/glibmm-2.4 -IC:/msys64/mingw64/lib/glibmm-2.4/include -IC:/msys64/mingw64/include/gtk-3.0 -IC:/msys64/mingw64/include/cairo -IC:/msys64/mingw64/include -IC:/msys64/mingw64/include/pango-1.0 -IC:/msys64/mingw64/include/fribidi -IC:/msys64/mingw64/include -IC:/msys64/mingw64/include/atk-1.0 -IC:/msys64/mingw64/include/cairo -IC:/msys64/mingw64/include/cairomm-1.0 -IC:/msys64/mingw64/lib/cairomm-1.0/include -IC:/msys64/mingw64/include/cairo -IC:/msys64/mingw64/include/pixman-1 -IC:/msys64/mingw64/include -IC:/msys64/mingw64/include/freetype2 -IC:/msys64/mingw64/include -IC:/msys64/mingw64/include/harfbuzz -IC:/msys64/mingw64/include/libpng16 -IC:/msys64/mingw64/include/sigc++-2.0 -IC:/msys64/mingw64/lib/sigc++-2.0/include -IC:/msys64/mingw64/include/gdk-pixbuf-2.0 -IC:/msys64/mingw64/include/libpng16 -IC:/msys64/mingw64/include -IC:/msys64/mingw64/lib/libffi-3.2.1/include -IC:/msys64/mingw64/include/glib-2.0 -IC:/msys64/mingw64/lib/glib-2.0/include -IC:/msys64/mingw64/include -O2 -c C:\Users\stahta01\devel\open_source_code\no_version_control\test\testgtkmm\main.cpp -o obj\Release\main.o
x86_64-w64-mingw32-g++.exe -o bin\Release\testgtkmm.exe obj\Release\main.o -LC:/msys64/mingw64/lib -lgtkmm-3.0 -latkmm-1.6 -lgdkmm-3.0 -lgiomm-2.4 -lpangomm-1.4 -lglibmm-2.4 -lgtk-3 -lgdk-3 -lgdi32 -limm32 -lshell32 -lole32 -Wl,-luuid -lwinmm -ldwmapi -lsetupapi -lcfgmgr32 -lz -lpangowin32-1.0 -lpangocairo-1.0 -lpango-1.0 -latk-1.0 -lcairo-gobject -lgio-2.0 -lcairomm-1.0 -lcairo -lsigc-2.0 -lgdk_pixbuf-2.0 -lgobject-2.0 -lglib-2.0 -lintl -s -mwindows
Output file is bin\Release\testgtkmm.exe with size 20.00 KB
Process terminated with status 0 (0 minute(s), 7 second(s))
0 error(s), 0 warning(s) (0 minute(s), 7 second(s))
Looking at your test code, it is exactly the same as the one I tested and return errors. Yours compiles and works, mine not... still returning the same errors. see below the log:
-------------- Build: Debug in testgtkmm (compiler: GNU GCC Compiler)---------------
x86_64-w64-mingw32-g++.exe -Wall -mms-bitfields -pthread -mms-bitfields -IC:/dev/msys32/mingw64/include/gtkmm-3.0 -IC:/dev/msys32/mingw64/lib/gtkmm-3.0/include -IC:/dev/msys32/mingw64/include/atkmm-1.6 -IC:/dev/msys32/mingw64/include/gdkmm-3.0 -IC:/dev/msys32/mingw64/lib/gdkmm-3.0/include -IC:/dev/msys32/mingw64/include/giomm-2.4 -IC:/dev/msys32/mingw64/lib/giomm-2.4/include -IC:/dev/msys32/mingw64/include/pangomm-1.4 -IC:/dev/msys32/mingw64/lib/pangomm-1.4/include -IC:/dev/msys32/mingw64/include/glibmm-2.4 -IC:/dev/msys32/mingw64/lib/glibmm-2.4/include -IC:/dev/msys32/mingw64/include/gtk-3.0 -IC:/dev/msys32/mingw64/include/cairo -IC:/dev/msys32/mingw64/include -IC:/dev/msys32/mingw64/include/pango-1.0 -IC:/dev/msys32/mingw64/include/fribidi -IC:/dev/msys32/mingw64/include -IC:/dev/msys32/mingw64/include/atk-1.0 -IC:/dev/msys32/mingw64/include/cairo -IC:/dev/msys32/mingw64/include/cairomm-1.0 -IC:/dev/msys32/mingw64/lib/cairomm-1.0/include -IC:/dev/msys32/mingw64/include/cairo -IC:/dev/msys32/mingw64/include/pixman-1 -IC:/dev/msys32/mingw64/include -IC:/dev/msys32/mingw64/include/freetype2 -IC:/dev/msys32/mingw64/include -IC:/dev/msys32/mingw64/include/harfbuzz -I/mingw64/include -IC:/dev/msys32/mingw64/include/libpng16 -IC:/dev/msys32/mingw64/include/sigc++-2.0 -IC:/dev/msys32/mingw64/lib/sigc++-2.0/include -IC:/dev/msys32/mingw64/include/gdk-pixbuf-2.0 -IC:/dev/msys32/mingw64/include/libpng16 -IC:/dev/msys32/mingw64/include -IC:/dev/msys32/mingw64/lib/libffi-3.2.1/include -IC:/dev/msys32/mingw64/include/glib-2.0 -IC:/dev/msys32/mingw64/lib/glib-2.0/include -IC:/dev/msys32/mingw64/include -g -std=c++14 -m64 -IC:\dev\msys32\mingw64\include\gtkmm-3.0 -c C:\Work\Programmation\Essais\EssaiGtkmStahta01\main.cpp -o obj\Debug\main.o
x86_64-w64-mingw32-g++.exe -LC:\Work\Programmation\Pplot\plplot-5.14.0.tar\plplot-5.14.0 -o bin\Debug\testgtkmm.exe obj\Debug\main.o -LC:/dev/msys32/mingw64/lib -lgtkmm-3.0 -latkmm-1.6 -lgdkmm-3.0 -lgiomm-2.4 -lpangomm-1.4 -lglibmm-2.4 -lgtk-3 -lgdk-3 -lgdi32 -limm32 -lshell32 -lole32 -Wl,-luuid -lwinmm -ldwmapi -lsetupapi -lcfgmgr32 -lz -lpangowin32-1.0 -lpangocairo-1.0 -lpango-1.0 -latk-1.0 -lcairo-gobject -lgio-2.0 -lcairomm-1.0 -lcairo -lsigc-2.0 -lgdk_pixbuf-2.0 -lgobject-2.0 -lglib-2.0 -lintl -m64