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#find libusb 1.0 on various systems
#sets LIBUSB_FOUND, LIBUSB_LIBRARIES, LIBUSB_INCLUDE_DIRS
#override LIBUSB_LIBRARIES LIBUSB_INCLUDE_DIRS to manually set
INCLUDE(FindPkgConfig)
PKG_CHECK_MODULES(PC_LIBUSB QUIET libusb-1.0)
FIND_PATH(LIBUSB_INCLUDE_DIRS
NAMES libusb.h
HINTS $ENV{LIBUSB_DIR}/include ${PC_LIBUSB_INCLUDEDIR}
PATHS /usr/local/include/libusb-1.0 /usr/local/include
/usr/include/libusb-1.0 /usr/include
/opt/local/include/libusb-1.0
#non-conforming naming convention,
#backwards compatible with old script
${LIBUSB_INCLUDE_DIR}
)
#standard library name for libusb-1.0
set(libusb1_library_names usb-1.0)
#libusb-1.0 compatible library on freebsd
if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
list(APPEND libusb1_library_names usb)
endif()
FIND_LIBRARY(LIBUSB_LIBRARIES
NAMES ${libusb1_library_names}
HINTS $ENV{LIBUSB_DIR}/lib ${PC_LIBUSB_LIBDIR}
PATHS /usr/local/lib /usr/lib /opt/local/lib
)
enable_language(C) #needs C support for check below
include(CheckFunctionExists)
if(LIBUSB_INCLUDE_DIRS)
set(CMAKE_REQUIRED_INCLUDES ${LIBUSB_INCLUDE_DIRS})
endif()
if(LIBUSB_LIBRARIES)
set(CMAKE_REQUIRED_LIBRARIES ${LIBUSB_LIBRARIES})
endif()
CHECK_FUNCTION_EXISTS("libusb_handle_events_timeout_completed" HAVE_LIBUSB_HANDLE_EVENTS_TIMEOUT_COMPLETED)
if(HAVE_LIBUSB_HANDLE_EVENTS_TIMEOUT_COMPLETED)
list(APPEND LIBUSB_DEFINITIONS "HAVE_LIBUSB_HANDLE_EVENTS_TIMEOUT_COMPLETED=1")
endif(HAVE_LIBUSB_HANDLE_EVENTS_TIMEOUT_COMPLETED)
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBUSB DEFAULT_MSG LIBUSB_LIBRARIES LIBUSB_INCLUDE_DIRS)
MARK_AS_ADVANCED(LIBUSB_INCLUDE_DIRS LIBUSB_LIBRARIES)
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