Dolphin Emulator CMake errors

clara dolphin-emu/build ‹master› » cmake ..
x86_64
OpenMP parallelization enabled
-- Could NOT find ALSA (missing:  ALSA_LIBRARY ALSA_INCLUDE_DIR)
ALSA NOT found, disabling ALSA sound backend
ao NOT found, disabling ao sound backend
bluez found, enabling bluetooth support
PulseAudio found, enabling PulseAudio sound backend
-- Could NOT find OpenAL (missing:  OPENAL_LIBRARY OPENAL_INCLUDE_DIR)
OpenAL NOT found, disabling OpenAL sound backend
-- checking for modules 'wayland-egl;wayland-client;wayland-cursor'
--   package 'wayland-egl' not found
--   package 'wayland-client' not found
--   package 'wayland-cursor' not found
Wayland support disabled
X11 support enabled
Xrandr found
libav found, enabling AVI frame dumps
PortAudio not found, disabling mic support
Using static lzo from Externals
-- Could NOT find SDL2 (missing:  SDL2_LIBRARY SDL2_INCLUDE_DIR)
Using static SDL from Externals
-- checking for module 'libusb-1.0'
--   package 'libusb-1.0' not found
-- libusb-1.0 not found.
Could NOT find SFML (missing:  SFML_INCLUDE_DIR)
Using static SFML 1.5 from Externals
-- Could not find miniupnp
Using static miniupnpc from Externals
-- Could not find polarssl
Using PolarSSL from Externals
Using static SOIL from Externals
Using shared zlib
-- checking for one of the modules 'glew>=1.8'
Using static GLEW from Externals
-- Could NOT find wxWidgets (missing:  wxWidgets_FOUND)
-- Could NOT find wxWidgets (missing:  wxWidgets_FOUND)
-- Some or all of the gtk libraries were not found. (missing:  GTK2_GTK_LIBRARY GTK2_GTK_INCLUDE_DIR GTK2_GDK_INCLUDE_DIR GTK2_GDKCONFIG_INCLUDE_DIR GTK2_GDK_LIBRARY)
Using static wxWidgets from Externals
gthread-2.0 found
pangocairo found
CMake Error at /usr/share/cmake-2.8/Modules/FindGettext.cmake:83 (ADD_CUSTOM_TARGET):
  add_custom_target cannot create target "translations" because another
  target with the same name already exists.  The existing target is a custom
  target created in source directory
  "/home/jon/Build/dolphin-emu/dolphin-emu/Source/Core/DolphinWX".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  Source/Core/DolphinWX/CMakeLists.txt:181 (GETTEXT_CREATE_TRANSLATIONS)


-- Configuring incomplete, errors occurred!
clara dolphin-emu/build ‹master› »