a) compile bootstrap/mozilla
b) compile all dependencies for Devhelp (Gtk, etc)
c) compile devhelp

This will appear : 
gcc -I/opt/gnome2/include -I/usr/X11R6/include -O2 -pipe -Wall
-Wno-uninitialized -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes
-Wnested-externs -Wpointer-arith -Wno-sign-compare -o .libs/devhelp-bin
dh-main.o -Wl,--export-dynamic  -L/opt/gnome2/lib -L/usr/X11R6/lib -lm
./.libs/libdevhelp-1.so /opt/gnome2/lib/libgnomeui-2.so -L/usr/lib
/opt/gnome2/lib/libgnome-keyring.so /usr/lib/libjpeg.so
/opt/gnome2/lib/libbonoboui-2.so -lSM -lICE -lX11
/opt/gnome2/lib/libgnomecanvas-2.so /opt/gnome2/lib/libgnome-2.so
/usr/lib/libesd.so /usr/lib/libaudiofile.so /opt/gnome2/lib/libart_lgpl_2.so
/opt/gnome2/lib/libpangoft2-1.0.so /opt/gnome2/lib/libgnomevfs-2.so
/opt/gnome2/lib/libgconf-2.so /opt/gnome2/lib/libbonobo-2.so
/opt/gnome2/lib/libhowl.so -lresolv -lrt /opt/gnome2/lib/libbonobo-activation.so
/opt/gnome2/lib/libORBitCosNaming-2.so /opt/gnome2/lib/libORBit-2.so
/usr/lib/libpopt.so /opt/gnome2/lib/libgthread-2.0.so
/opt/gnome2/lib/libglade-2.0.so /opt/gnome2/lib/libgtk-x11-2.0.so
/opt/gnome2/lib/libxml2.so -lz /opt/gnome2/lib/libgdk-x11-2.0.so
/opt/gnome2/lib/libatk-1.0.so /opt/gnome2/lib/libgdk_pixbuf-2.0.so
/opt/gnome2/lib/libpangoxft-1.0.so /opt/gnome2/lib/libpangox-1.0.so
/opt/gnome2/lib/libpango-1.0.so /opt/gnome2/lib/libgobject-2.0.so
/opt/gnome2/lib/libgmodule-2.0.so /opt/gnome2/lib/libglib-2.0.so
-L/opt/gnome2/lib/mozilla-1.7.2 -lgtkembedmoz -lxpcom -lplds4 -lplc4 -lnspr4
-lpthread -ldl -Wl,--rpath -Wl,/opt/gnome2/lib
./.libs/libdevhelp-1.so: undefined reference to
`nsCOMPtr_base::assign_from_qi(nsQueryInterface, nsID const&)'