build: Add FindLibusb1.cmake

cmake/FindLibusb1.cmake

+# - try to find libusb-1 library
+#
+# Cache Variables: (probably not for direct use in your scripts)
+#  LIBUSB1_LIBRARY
+#  LIBUSB1_INCLUDE_DIR
+#
+# Non-cache variables you should use in your CMakeLists.txt:
+#  LIBUSB1_LIBRARIES
+#  LIBUSB1_INCLUDE_DIRS
+#  LIBUSB1_FOUND - if this is not true, do not attempt to use this library
+#
+# Requires these CMake modules:
+#  ProgramFilesGlob
+#  FindPackageHandleStandardArgs (known included with CMake >=2.6.2)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+
+set(LIBUSB1_ROOT_DIR
+	"${LIBUSB1_ROOT_DIR}"
+	CACHE
+	PATH
+	"Root directory to search for libusb-1")
+
+if(WIN32)
+	include(ProgramFilesGlob)
+	program_files_fallback_glob(_dirs "LibUSB-Win32")
+	if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+		if(MSVC)
+			set(_lib_suffixes lib/msvc_x64 MS64/static)
+		endif()
+	else()
+		if(MSVC)
+			set(_lib_suffixes lib/msvc MS32/static)
+		elseif(COMPILER_IS_GNUCXX)
+			set(_lib_suffixes lib/gcc)
+		endif()
+	endif()
+else()
+	set(_lib_suffixes)
+	find_package(PkgConfig QUIET)
+	if(PKG_CONFIG_FOUND)
+		pkg_check_modules(PC_LIBUSB1 libusb-1.0)
+	endif()
+endif()
+
+find_path(LIBUSB1_INCLUDE_DIR
+	NAMES
+	libusb.h
+	PATHS
+	${PC_LIBUSB1_INCLUDE_DIRS}
+	${PC_LIBUSB1_INCLUDEDIR}
+	${_dirs}
+	HINTS
+	"${LIBUSB1_ROOT_DIR}"
+	PATH_SUFFIXES
+	include/libusb-1.0
+	include
+	libusb-1.0)
+
+find_library(LIBUSB1_LIBRARY
+	NAMES
+	libusb-1.0
+	usb-1.0
+	PATHS
+	${PC_LIBUSB1_LIBRARY_DIRS}
+	${PC_LIBUSB1_LIBDIR}
+	${_dirs}
+	HINTS
+	"${LIBUSB1_ROOT_DIR}"
+	PATH_SUFFIXES
+	${_lib_suffixes})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libusb1
+	DEFAULT_MSG
+	LIBUSB1_LIBRARY
+	LIBUSB1_INCLUDE_DIR)
+
+if(LIBUSB1_FOUND)
+	set(LIBUSB1_LIBRARIES "${LIBUSB1_LIBRARY}")
+
+	set(LIBUSB1_INCLUDE_DIRS "${LIBUSB1_INCLUDE_DIR}")
+
+	mark_as_advanced(LIBUSB1_ROOT_DIR)
+endif()
+
+mark_as_advanced(LIBUSB1_INCLUDE_DIR LIBUSB1_LIBRARY)