Simply FindLibUSB.cmake for Windows

Also, do not maintain two libusb profiles (Release/Debug).
The user can choose one to build libfreenect2 against.

Author: xlz

examples/protonect/cmake_modules/FindLibUSB.cmake

@@ -13,83 +13,29 @@ IF(PKG_CONFIG_FOUND)
   RETURN()
 ENDIF()
 
-include ( CheckLibraryExists )
-include ( CheckIncludeFile )
-
-find_path ( LibUSB_INCLUDE_DIRS
-  NAMES
-    libusb.h
+FIND_PATH(LibUSB_INCLUDE_DIRS
+  NAMES libusb.h
   PATHS
-    ${CMAKE_SOURCE_DIR}/../../depends/libusbx/include
-    $ENV{LibUSB_ROOT}
+    ${CMAKE_SOURCE_DIR}/../../depends/libusb
+    ${CMAKE_SOURCE_DIR}/../../depends/libusbx
+    ENV LibUSB_ROOT
   PATH_SUFFIXES
-    libusb
-  )
-
-mark_as_advanced ( LibUSB_INCLUDE_DIRS )
-
-if ( ${CMAKE_SYSTEM_NAME} STREQUAL "Windows" )
-  # LibUSB binary distribution contains several libs.
-  # Use the lib that got compiled with the same compiler.
-  if ( MSVC )
-  if ( ${CMAKE_SIZEOF_VOID_P} EQUAL 8 )
-    set ( LibUSB_LIBRARY_PATH_SUFFIX_RELEASE x64/Release/dll )
-    set ( LibUSB_LIBRARY_PATH_SUFFIX_DEBUG x64/Debug/dll )
-  else ()
-    set ( LibUSB_LIBRARY_PATH_SUFFIX_RELEASE win32/Release/dll )
-    set ( LibUSB_LIBRARY_PATH_SUFFIX_DEBUG win32/Debug/dll )
-  endif ()      
-  endif ( MSVC )
-endif ( ${CMAKE_SYSTEM_NAME} STREQUAL "Windows" )
+    include
+)
 
-find_library ( LibUSB_LIBRARY_RELEASE
-  NAMES
-    libusb libusb-1.0 usb
-  PATHS
-    ${CMAKE_SOURCE_DIR}/../../depends/libusbx/MS64
-    $ENV{LibUSB_ROOT}
-  PATH_SUFFIXES
-    ${LibUSB_LIBRARY_PATH_SUFFIX_RELEASE}
-  )
-  
-find_library ( LibUSB_LIBRARY_DEBUG
-  NAMES
-    libusb libusb-1.0 libusb-1.0d usb
+FIND_LIBRARY(LibUSB_LIBRARIES
+  NAMES libusb-1.0
   PATHS
-    $ENV{LibUSB_ROOT}
+    "${DEPENDS_DIR}/libusb"
+    "${DEPENDS_DIR}/libusbx"
+    ENV LibUSB_ROOT
   PATH_SUFFIXES
-    ${LibUSB_LIBRARY_PATH_SUFFIX_DEBUG}
-  )  
-  
-  if( ${LibUSB_LIBRARY_DEBUG} STREQUAL "LibUSB_LIBRARY_DEBUG-NOTFOUND" AND NOT ${LibUSB_LIBRARY_RELEASE} STREQUAL "LibUSB_LIBRARY_RELEASE-NOTFOUND")
-	  message(STATUS "Debug version not found - setting debug to release.")
-	  unset(LibUSB_LIBRARY_DEBUG CACHE)
-	  set(LibUSB_LIBRARY_DEBUG ${LibUSB_LIBRARY_RELEASE} CACHE STRING "LibUSB_LIBRARY_DEBUG")
-  endif()
-  
-set (LibUSB_LIBRARIES
-  debug ${LibUSB_LIBRARY_DEBUG}
-  optimized ${LibUSB_LIBRARY_RELEASE}
-  )
-
-if ( LibUSB_INCLUDE_DIRS AND LibUSB_LIBRARIES )
-  set ( LibUSB_FOUND 1 )
-endif ( LibUSB_INCLUDE_DIRS AND LibUSB_LIBRARIES )
-
-if ( LibUSB_FOUND )
-  set ( CMAKE_REQUIRED_INCLUDES "${LibUSB_INCLUDE_DIRS}" )
-  check_include_file ( usb.h LibUSB_FOUND )
-endif ( LibUSB_FOUND )
-
-if ( LibUSB_FOUND )
-  check_library_exists ( "${LibUSB_LIBRARIES}" usb_open "" LibUSB_FOUND )
-endif ( LibUSB_FOUND )
-
-if ( NOT LibUSB_FOUND )
-  if ( NOT LibUSB_FIND_QUIETLY )
-  message ( STATUS "LibUSB not found, try setting LibUSB_ROOT environment variable." )
-  endif ( NOT LibUSB_FIND_QUIETLY )
-  if ( LibUSB_FIND_REQUIRED )
-  message ( FATAL_ERROR "LibUSB could not be found." )
-  endif ( LibUSB_FIND_REQUIRED )
-endif ( NOT LibUSB_FOUND )
+    x64/Release/dll
+    x64/Debug/dll
+    Win32/Release/dll
+    Win32/Debug/dll
+    MS64
+)
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibUSB DEFAULT_MSG LibUSB_LIBRARIES LibUSB_INCLUDE_DIRS)