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# This CMake script wants to use libusb functionality, therefore it looks
# for libusb include files and libraries.
#
# Operating Systems Supported:
# - Unix (requires pkg-config)
# Tested with Ubuntu 9.04 and Fedora 11
# - Windows (requires MinGW)
# Tested with Windows XP/Windows 7
#
# This should work for both 32 bit and 64 bit systems.
#
# Author: F. Kooman <fkooman@tuxed.net>
#
# FreeBSD has built-in libusb since 800069
IF(CMAKE_SYSTEM_NAME MATCHES FreeBSD)
EXEC_PROGRAM(sysctl ARGS -n kern.osreldate OUTPUT_VARIABLE FREEBSD_VERSION)
SET(MIN_FREEBSD_VERSION 800068)
IF(FREEBSD_VERSION GREATER ${MIN_FREEBSD_VERSION})
SET(LIBUSB_FOUND TRUE)
SET(LIBUSB_INCLUDE_DIRS "/usr/include")
SET(LIBUSB_LIBRARIES "usb")
SET(LIBUSB_LIBRARY_DIRS "/usr/lib/")
ENDIF(FREEBSD_VERSION GREATER ${MIN_FREEBSD_VERSION})
ENDIF(CMAKE_SYSTEM_NAME MATCHES FreeBSD)
IF(NOT LIBUSB_FOUND)
IF(WIN32)
FIND_PATH(LIBUSB_INCLUDE_DIRS lusb0_usb.h "$ENV{ProgramFiles}/LibUSB-Win32/include" NO_SYSTEM_ENVIRONMENT_PATH)
FIND_LIBRARY(LIBUSB_LIBRARIES NAMES libusb PATHS "$ENV{ProgramFiles}/LibUSB-Win32/lib/gcc")
SET(LIBUSB_LIBRARY_DIR "$ENV{ProgramFiles}/LibUSB-Win32/bin/x86/")
# Must fix up variable to avoid backslashes during packaging
STRING(REGEX REPLACE "\\\\" "/" LIBUSB_LIBRARY_DIR ${LIBUSB_LIBRARY_DIR})
ELSE(WIN32)
# If not under Windows we use PkgConfig
FIND_PACKAGE (PkgConfig)
IF(PKG_CONFIG_FOUND)
PKG_CHECK_MODULES(LIBUSB REQUIRED libusb)
ELSE(PKG_CONFIG_FOUND)
MESSAGE(FATAL_ERROR "Could not find PkgConfig")
ENDIF(PKG_CONFIG_FOUND)
ENDIF(WIN32)
IF(LIBUSB_INCLUDE_DIRS AND LIBUSB_LIBRARIES)
SET(LIBUSB_FOUND TRUE)
ENDIF(LIBUSB_INCLUDE_DIRS AND LIBUSB_LIBRARIES)
ENDIF(NOT LIBUSB_FOUND)
IF(LIBUSB_FOUND)
IF(NOT LIBUSB_FIND_QUIETLY)
MESSAGE(STATUS "Found LIBUSB: ${LIBUSB_LIBRARIES} ${LIBUSB_INCLUDE_DIRS}")
ENDIF (NOT LIBUSB_FIND_QUIETLY)
ELSE(LIBUSB_FOUND)
IF(LIBUSB_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could not find LIBUSB")
ENDIF(LIBUSB_FIND_REQUIRED)
ENDIF(LIBUSB_FOUND)
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