greynetic.c:(.text+0x4f): undefined reference to `XGetWindowAttributes'
greynetic.c:(.text+0xa6): undefined reference to `get_boolean_resource'
greynetic.c:(.text+0xd9): undefined reference to `get_pixel_resource'
greynetic.c:(.text+0x112): undefined reference to `get_pixel_resource'
greynetic.c:(.text+0x13e): undefined reference to `get_integer_resource'
greynetic.c:(.text+0x185): undefined reference to `XCreateGC'
greynetic.c:(.text+0x1dd): undefined reference to `XCreatePixmapFromBitmapData'