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				|  |  | +# Ceres Solver - A fast non-linear least squares minimizer
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				|  |  | +# Copyright 2013 Google Inc. All rights reserved.
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				|  |  | +# http://code.google.com/p/ceres-solver/
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				|  |  | +#
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				|  |  | +# Redistribution and use in source and binary forms, with or without
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				|  |  | +# modification, are permitted provided that the following conditions are met:
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				|  |  | +#
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				|  |  | +# * Redistributions of source code must retain the above copyright notice,
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				|  |  | +#   this list of conditions and the following disclaimer.
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				|  |  | +# * Redistributions in binary form must reproduce the above copyright notice,
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				|  |  | +#   this list of conditions and the following disclaimer in the documentation
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				|  |  | +#   and/or other materials provided with the distribution.
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				|  |  | +# * Neither the name of Google Inc. nor the names of its contributors may be
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				|  |  | +#   used to endorse or promote products derived from this software without
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				|  |  | +#   specific prior written permission.
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				|  |  | +#
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				|  |  | +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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				|  |  | +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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				|  |  | +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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				|  |  | +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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				|  |  | +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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				|  |  | +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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				|  |  | +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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				|  |  | +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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				|  |  | +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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				|  |  | +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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				|  |  | +# POSSIBILITY OF SUCH DAMAGE.
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				|  |  | +#
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				|  |  | +# Author: pablo.speciale@gmail.com (Pablo Speciale)
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				|  |  | +#
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				|  |  | +
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				|  |  | +# Default locations to search for on various platforms.
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				|  |  | +LIST(APPEND SEARCH_LIBS /usr/lib)
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				|  |  | +LIST(APPEND SEARCH_LIBS /usr/local/lib)
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				|  |  | +LIST(APPEND SEARCH_LIBS /usr/local/homebrew/lib) # Mac OS X
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				|  |  | +LIST(APPEND SEARCH_LIBS /opt/local/lib)
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				|  |  | +
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				|  |  | +LIST(APPEND SEARCH_HEADERS /usr/include)
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				|  |  | +LIST(APPEND SEARCH_HEADERS /usr/local/include)
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				|  |  | +LIST(APPEND SEARCH_HEADERS /usr/local/homebrew/include) # Mac OS X
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				|  |  | +LIST(APPEND SEARCH_HEADERS /opt/local/include)
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				|  |  | +
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				|  |  | +# Locations to search for Eigen
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				|  |  | +SET(EIGEN_SEARCH_HEADERS ${SEARCH_HEADERS})
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				|  |  | +LIST(APPEND EIGEN_SEARCH_HEADERS /usr/include/eigen3) # Ubuntu 10.04's default location.
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				|  |  | +LIST(APPEND EIGEN_SEARCH_HEADERS /usr/local/include/eigen3)
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				|  |  | +LIST(APPEND EIGEN_SEARCH_HEADERS /usr/local/homebrew/include/eigen3)  # Mac OS X
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				|  |  | +LIST(APPEND EIGEN_SEARCH_HEADERS /opt/local/var/macports/software/eigen3/opt/local/include/eigen3) # Mac OS X
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				|  |  | +
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				|  |  | +# Google Flags
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				|  |  | +OPTION(GFLAGS
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				|  |  | +       "Enable Google Flags."
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				|  |  | +       ON)
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				|  |  | +
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				|  |  | +IF (${GFLAGS})
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				|  |  | +  MESSAGE("-- Check for Google Flags")
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				|  |  | +  FIND_LIBRARY(GFLAGS_LIB NAMES gflags PATHS ${SEARCH_LIBS})
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				|  |  | +  IF (NOT EXISTS ${GFLAGS_LIB})
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				|  |  | +    MESSAGE(FATAL_ERROR
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				|  |  | +            "Can't find Google Flags. Please specify: "
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				|  |  | +            "-DGFLAGS_LIB=...")
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				|  |  | +  ENDIF (NOT EXISTS ${GFLAGS_LIB})
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				|  |  | +  MESSAGE("-- Found Google Flags library: ${GFLAGS_LIB}")
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				|  |  | +  FIND_PATH(GFLAGS_INCLUDE NAMES gflags/gflags.h PATHS ${SEARCH_HEADERS})
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				|  |  | +  IF (NOT EXISTS ${GFLAGS_INCLUDE})
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				|  |  | +    MESSAGE(FATAL_ERROR
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				|  |  | +            "Can't find Google Flags. Please specify: "
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				|  |  | +            "-DGFLAGS_INCLUDE=...")
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				|  |  | +  ENDIF (NOT EXISTS ${GFLAGS_INCLUDE})
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				|  |  | +  MESSAGE("-- Found Google Flags header in: ${GFLAGS_INCLUDE}")
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				|  |  | +ENDIF (${GFLAGS})
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				|  |  | +
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				|  |  | +# Google Logging
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				|  |  | +MESSAGE("-- Check for Google Log")
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				|  |  | +FIND_LIBRARY(GLOG_LIB NAMES glog PATHS ${SEARCH_LIBS})
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				|  |  | +IF (NOT EXISTS ${GLOG_LIB})
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				|  |  | +  MESSAGE(FATAL_ERROR
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				|  |  | +          "Can't find Google Log. Please specify: "
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				|  |  | +          "-DGLOG_LIB=...")
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				|  |  | +ENDIF (NOT EXISTS ${GLOG_LIB})
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				|  |  | +MESSAGE("-- Found Google Log library: ${GLOG_LIB}")
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				|  |  | +
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				|  |  | +FIND_PATH(GLOG_INCLUDE NAMES glog/logging.h PATHS ${SEARCH_HEADERS})
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				|  |  | +IF (NOT EXISTS ${GLOG_INCLUDE})
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				|  |  | +  MESSAGE(FATAL_ERROR
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				|  |  | +          "Can't find Google Log. Please specify: "
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				|  |  | +          "-DGLOG_INCLUDE=...")
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				|  |  | +ENDIF (NOT EXISTS ${GLOG_INCLUDE})
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				|  |  | +MESSAGE("-- Found Google Log header in: ${GLOG_INCLUDE}")
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				|  |  | +
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				|  |  | +# Eigen
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				|  |  | +MESSAGE("-- Check for Eigen 3.x")
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				|  |  | +FIND_PATH(EIGEN_INCLUDE NAMES Eigen/Core PATHS ${EIGEN_SEARCH_HEADERS})
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				|  |  | +IF (NOT EXISTS ${EIGEN_INCLUDE})
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				|  |  | +  MESSAGE(FATAL_ERROR "Can't find Eigen. Try passing -DEIGEN_INCLUDE=...")
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				|  |  | +ENDIF (NOT EXISTS ${EIGEN_INCLUDE})
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				|  |  | +MESSAGE("-- Found Eigen 3.x: ${EIGEN_INCLUDE}")
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				|  |  | +
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				|  |  | +
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				|  |  | +INCLUDE_DIRECTORIES(
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				|  |  | +  ${GLOG_INCLUDE}
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				|  |  | +  ${EIGEN_INCLUDE}
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				|  |  | +  )
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