>>490さん有難う御座います。
x86_64及びppc7400で正常にコンパイル出来ました。
しかし、Gentoo本家に上がって居る2.6.0-p100208では以下のエラーを吐きます。
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x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I../.. -I../../src -D_REENTRANT -I/usr/include/gtkmm-2.4 -I/
usr/lib64/gtkmm-2.4/include -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/giomm-2.4 -I/
usr/lib64/giomm-2.4/include -I/usr/include/gdkmm-2.4 -I/usr/lib64/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/lib64/sigc++-2.0/include -I/usr/include/
glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/gtk-2.0/include -I/usr/include/cairomm-1.0 -I/usr/include/pango-1.0 -I/
usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/directfb -I/usr/include/libpng12 -I/
usr/include/atk-1.0 -O2 -march=k8 -pipe -msse3 -ggdb -Wall -DGTKMMVER=2120 -DUSE_XSMP -MT tablabel.o
-MD -MP -MF .deps/tablabel.Tpo -c -o tablabel.o tablabel.cpp
dragnote.cpp: In constructor 'SKELETON::DragableNoteBook::DragableNoteBook()':
dragnote.cpp:54: error: 'memset' was not declared in this scope
make[3]: *** [dragnote.o] Error 1
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こちらでは"dragnote.cpp"みたいですね。