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# - Find the native sqlite3 includes and library
#
# This module defines
# GPHOTO2_INCLUDE_DIR, where to find libgphoto2 header files
# GPHOTO2_LIBRARIES, the libraries to link against to use libgphoto2
# GPHOTO2_FOUND, If false, do not try to use libgphoto2.
# GPHOTO2_VERSION_STRING, e.g. 2.4.14
# GPHOTO2_VERSION_MAJOR, e.g. 2
# GPHOTO2_VERSION_MINOR, e.g. 4
# GPHOTO2_VERSION_PATCH, e.g. 14
#
# also defined, but not for general use are
# GPHOTO2_LIBRARY, where to find the sqlite3 library.
#=============================================================================
# Copyright 2010 henrik andersson
#=============================================================================
SET(GPHOTO2_FIND_REQUIRED ${Gphoto2_FIND_REQUIRED})
find_path(GPHOTO2_INCLUDE_DIR gphoto2/gphoto2.h)
mark_as_advanced(GPHOTO2_INCLUDE_DIR)
set(GPHOTO2_NAMES ${GPHOTO2_NAMES} gphoto2 libgphoto2)
set(GPHOTO2_PORT_NAMES ${GPHOTO2_PORT_NAMES} gphoto2_port libgphoto2_port)
find_library(GPHOTO2_LIBRARY NAMES ${GPHOTO2_NAMES} )
find_library(GPHOTO2_PORT_LIBRARY NAMES ${GPHOTO2_PORT_NAMES} )
mark_as_advanced(GPHOTO2_LIBRARY)
mark_as_advanced(GPHOTO2_PORT_LIBRARY)
# Detect libgphoto2 version
FIND_PROGRAM(GPHOTO2CONFIG_EXECUTABLE NAMES gphoto2-config)
IF(GPHOTO2CONFIG_EXECUTABLE)
EXEC_PROGRAM(${GPHOTO2CONFIG_EXECUTABLE} ARGS --version RETURN_VALUE _return_VALUE OUTPUT_VARIABLE GPHOTO2_VERSION)
string(REGEX REPLACE "^.*libgphoto2 ([0-9]+).*$" "\\1" GPHOTO2_VERSION_MAJOR "${GPHOTO2_VERSION}")
string(REGEX REPLACE "^.*libgphoto2 [0-9]+\\.([0-9]+).*$" "\\1" GPHOTO2_VERSION_MINOR "${GPHOTO2_VERSION}")
string(REGEX REPLACE "^.*libgphoto2 [0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" GPHOTO2_VERSION_PATCH "${GPHOTO2_VERSION}")
set(GPHOTO2_VERSION_STRING "${GPHOTO2_VERSION_MAJOR}.${GPHOTO2_VERSION_MINOR}.${GPHOTO2_VERSION_PATCH}")
ENDIF(GPHOTO2CONFIG_EXECUTABLE)
# handle the QUIETLY and REQUIRED arguments and set GPHOTO2_FOUND to TRUE if
# all listed variables are TRUE
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GPHOTO2 DEFAULT_MSG GPHOTO2_LIBRARY GPHOTO2_INCLUDE_DIR)
IF(GPHOTO2_FOUND)
SET(Gphoto2_LIBRARIES ${GPHOTO2_LIBRARY} ${GPHOTO2_PORT_LIBRARY})
SET(Gphoto2_INCLUDE_DIRS ${GPHOTO2_INCLUDE_DIR})
# libgphoto2 dynamically loads and unloads usb library
# without calling any cleanup functions (since they are absent from libusb-0.1).
# This leaves usb event handling threads running with invalid callback and return addresses,
# which causes a crash after any usb event is generated, at least in Mac OS X.
# libusb1 backend does correctly call exit function, but ATM it crashes anyway.
# Workaround is to link against libusb so that it wouldn't get unloaded.
IF(APPLE)
find_library(USB_LIBRARY NAMES usb-1.0 libusb-1.0)
mark_as_advanced(USB_LIBRARY)
IF(USB_LIBRARY)
SET(Gphoto2_LIBRARIES ${Gphoto2_LIBRARIES} ${USB_LIBRARY})
ENDIF(USB_LIBRARY)
ENDIF(APPLE)
ENDIF(GPHOTO2_FOUND)
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