libnfc/cmake_modules/FindLIBUSB.cmake

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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 MSVC)
# Tested with Windows XP
#
# This should work for both 32 bit and 64 bit systems.
#
# Author: F. Kooman <fkooman@tuxed.net>
#
IF(MSVC)
# Windows with Microsoft Visual C++
FIND_PATH(LIBUSB_INCLUDE_DIRS usb.h "$ENV{ProgramFiles}/LibUSB-Win32/include")
IF(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x64")
# on x64 (win64)
FIND_LIBRARY(LIBUSB_LIBRARIES NAMES libusb PATHS "$ENV{ProgramFiles}/LibUSB-Win32/lib/msvc_x64")
ELSE(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x64")
# on x86 (win32)
FIND_LIBRARY(LIBUSB_LIBRARIES NAMES libusb PATHS "$ENV{ProgramFiles}/LibUSB-Win32/lib/msvc")
ENDIF(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x64")
ELSE(MSVC)
# If not MS Visual Studio 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(MSVC)
IF(LIBUSB_INCLUDE_DIRS AND LIBUSB_LIBRARIES)
SET(LIBUSB_FOUND TRUE)
ENDIF(LIBUSB_INCLUDE_DIRS AND LIBUSB_LIBRARIES)
IF(LIBUSB_FOUND)
IF(NOT LIBUSB_FIND_QUIETLY)
MESSAGE(STATUS "Found LIBUSB: ${LIBUSB_LIBRARIES}")
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)