[gtkmm] a error when Compile the HelloWorld!

[bbskill <bbkills tom com>]

in the gtkmm-tutorial.when I compile the HelloWorld example as follow:
root#g++ main.cc -o main `pkg-config gtkmm-2.4 --cflags --libs`
the error appears:
/tmp/ccjdtPck.o(.text+0x3c): In function `main':
: undefined reference to `HelloWorld::HelloWorld[in-charge]()'
/tmp/ccjdtPck.o(.text+0x52): In function `main':
: undefined reference to `HelloWorld::~HelloWorld [in-charge]()'
/tmp/ccjdtPck.o(.text+0x77): In function `main':
: undefined reference to `HelloWorld::~HelloWorld [in-charge]()'
collect2: ld returned 1 exit status

and my pkg-config
root# pkg-config gtkmm-2.4 --cflags --libs
-DXTHREADS -I/usr/include/gtkmm-2.4 -I/usr/lib/gtkmm-2.4/include
-I/usr/include/glibmm-2.4 -I/usr/lib/glibmm-2.4/include
-I/usr/include/gdkmm-2.4 -I/usr/lib/gdkmm-2.4/include
-I/usr/include/pangomm-1.4 -I/usr/include/atkmm-1.6
-I/usr/include/gtk-2.0 -I/usr/include/sigc++-2.0
-I/usr/lib/sigc++-2.0/include -I/usr/include/glib-2.0
-I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include
-I/usr/X11R6/include -I/usr/include/pango-1.0 -I/usr/include/freetype2
-I/usr/include/atk-1.0 -Wl,--export-dynamic -lgtkmm-2.4 -lgdkmm-2.4
-latkmm-1.6 -lgtk-x11-2.0 -lpangomm-1.4 -lglibmm-2.4 -lsigc-2.0
-lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lpangoxft-1.0 -lpangox-1.0
-lpango-1.0 -lgobject-2.0 -lgmodule-2.0 -ldl -lglib-2.0

Thank you for your help !!