gnuplot linked libraries

ldd $(which gnuplot)
        linux-gate.so.1 =>  (0xb7894000)
        libreadline.so.6 => /lib/libreadline.so.6 (0xb7843000)
        libgd.so.2 => /usr/lib/libgd.so.2 (0xb7802000)
        libwx_gtk2u_core-2.8.so.0 => /usr/lib/libwx_gtk2u_core-2.8.so.0 (0xb74bd000)
        libwx_baseu-2.8.so.0 => /usr/lib/libwx_baseu-2.8.so.0 (0xb7374000)
        libpangocairo-1.0.so.0 => /usr/lib/libpangocairo-1.0.so.0 (0xb7368000)
        libpango-1.0.so.0 => /usr/lib/libpango-1.0.so.0 (0xb7327000)
        libcairo.so.2 => /usr/lib/libcairo.so.2 (0xb7288000)
        libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0xb7243000)
        libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0xb7174000)
        libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0xb70dd000)
        libm.so.6 => /lib/libm.so.6 (0xb70b8000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb6fca000)
        libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0xb6fae000)
        libpthread.so.0 => /lib/libpthread.so.0 (0xb6f94000)
        libc.so.6 => /lib/libc.so.6 (0xb6e48000)
        libncursesw.so.5 => /lib/libncursesw.so.5 (0xb6dfb000)
        libjpeg.so.8 => /usr/lib/libjpeg.so.8 (0xb6dc6000)
        libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb6d98000)
        libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb6d13000)
        libpng14.so.14 => /usr/lib/libpng14.so.14 (0xb6ced000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb6cd7000)
        libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0xb690e000)
        libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0xb68f1000)
        libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0xb68ed000)
        libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0xb68ea000)
        libXxf86vm.so.1 => /usr/lib/libXxf86vm.so.1 (0xb68e4000)
        libSM.so.6 => /usr/lib/libSM.so.6 (0xb68dd000)
        libtiff.so.3 => /usr/lib/libtiff.so.3 (0xb6883000)
        libdl.so.2 => /lib/libdl.so.2 (0xb687f000)
        libpangoft2-1.0.so.0 => /usr/lib/libpangoft2-1.0.so.0 (0xb6858000)
        libgmodule-2.0.so.0 => /usr/lib/libgmodule-2.0.so.0 (0xb6854000)
        librt.so.1 => /lib/librt.so.1 (0xb684b000)
        libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0xb67e0000)
        libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb67d8000)
        libX11.so.6 => /home/zanmar/astro/idl/lib/libX11.so.6 (0xb66bc000)
        libpcre.so.0 => /lib/libpcre.so.0 (0xb6684000)
        libgio-2.0.so.0 => /usr/lib/libgio-2.0.so.0 (0xb6599000)
        libXext.so.6 => /usr/lib/libXext.so.6 (0xb658b000)
        libXi.so.6 => /usr/lib/libXi.so.6 (0xb657e000)
        libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0xb6577000)
        libXcursor.so.1 => /usr/lib/libXcursor.so.1 (0xb656d000)
        libXcomposite.so.1 => /usr/lib/libXcomposite.so.1 (0xb656a000)
        libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0xb6567000)
        libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0xb6562000)
        /lib/ld-linux.so.2 (0xb7895000)
        libexpat.so.1 => /usr/lib/libexpat.so.1 (0xb653c000)
        libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0xb6520000)
        libICE.so.6 => /usr/lib/libICE.so.6 (0xb6509000)
        libuuid.so.1 => /lib/libuuid.so.1 (0xb6505000)
        libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb64ed000)
        libresolv.so.2 => /lib/libresolv.so.2 (0xb64d7000)
        libXau.so.6 => /usr/lib/libXau.so.6 (0xb64d4000)
        libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb64cf000)