# Ceres Solver - A fast non-linear least squares minimizer
# Copyright 2013 Google Inc. All rights reserved.
# http://code.google.com/p/ceres-solver/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
# * Neither the name of Google Inc. nor the names of its contributors may be
#   used to endorse or promote products derived from this software without
#   specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Author: pablo.speciale@gmail.com (Pablo Speciale)
#

# Default locations to search for on various platforms.
LIST(APPEND SEARCH_LIBS /usr/lib)
LIST(APPEND SEARCH_LIBS /usr/local/lib)
LIST(APPEND SEARCH_LIBS /usr/local/homebrew/lib) # Mac OS X
LIST(APPEND SEARCH_LIBS /opt/local/lib)

LIST(APPEND SEARCH_HEADERS /usr/include)
LIST(APPEND SEARCH_HEADERS /usr/local/include)
LIST(APPEND SEARCH_HEADERS /usr/local/homebrew/include) # Mac OS X
LIST(APPEND SEARCH_HEADERS /opt/local/include)

# Locations to search for Eigen
SET(EIGEN_SEARCH_HEADERS ${SEARCH_HEADERS})
LIST(APPEND EIGEN_SEARCH_HEADERS /usr/include/eigen3) # Ubuntu 10.04's default location.
LIST(APPEND EIGEN_SEARCH_HEADERS /usr/local/include/eigen3)
LIST(APPEND EIGEN_SEARCH_HEADERS /usr/local/homebrew/include/eigen3)  # Mac OS X
LIST(APPEND EIGEN_SEARCH_HEADERS /opt/local/var/macports/software/eigen3/opt/local/include/eigen3) # Mac OS X

# Google Flags
OPTION(GFLAGS
       "Enable Google Flags."
       ON)

IF (${GFLAGS})
  MESSAGE("-- Check for Google Flags")
  FIND_LIBRARY(GFLAGS_LIB NAMES gflags PATHS ${SEARCH_LIBS})
  IF (NOT EXISTS ${GFLAGS_LIB})
    MESSAGE(FATAL_ERROR
            "Can't find Google Flags. Please specify: "
            "-DGFLAGS_LIB=...")
  ENDIF (NOT EXISTS ${GFLAGS_LIB})
  MESSAGE("-- Found Google Flags library: ${GFLAGS_LIB}")
  FIND_PATH(GFLAGS_INCLUDE NAMES gflags/gflags.h PATHS ${SEARCH_HEADERS})
  IF (NOT EXISTS ${GFLAGS_INCLUDE})
    MESSAGE(FATAL_ERROR
            "Can't find Google Flags. Please specify: "
            "-DGFLAGS_INCLUDE=...")
  ENDIF (NOT EXISTS ${GFLAGS_INCLUDE})
  MESSAGE("-- Found Google Flags header in: ${GFLAGS_INCLUDE}")
ENDIF (${GFLAGS})

# Google Logging
MESSAGE("-- Check for Google Log")
FIND_LIBRARY(GLOG_LIB NAMES glog PATHS ${SEARCH_LIBS})
IF (NOT EXISTS ${GLOG_LIB})
  MESSAGE(FATAL_ERROR
          "Can't find Google Log. Please specify: "
          "-DGLOG_LIB=...")
ENDIF (NOT EXISTS ${GLOG_LIB})
MESSAGE("-- Found Google Log library: ${GLOG_LIB}")

FIND_PATH(GLOG_INCLUDE NAMES glog/logging.h PATHS ${SEARCH_HEADERS})
IF (NOT EXISTS ${GLOG_INCLUDE})
  MESSAGE(FATAL_ERROR
          "Can't find Google Log. Please specify: "
          "-DGLOG_INCLUDE=...")
ENDIF (NOT EXISTS ${GLOG_INCLUDE})
MESSAGE("-- Found Google Log header in: ${GLOG_INCLUDE}")

# Eigen
MESSAGE("-- Check for Eigen 3.x")
FIND_PATH(EIGEN_INCLUDE NAMES Eigen/Core PATHS ${EIGEN_SEARCH_HEADERS})
IF (NOT EXISTS ${EIGEN_INCLUDE})
  MESSAGE(FATAL_ERROR "Can't find Eigen. Try passing -DEIGEN_INCLUDE=...")
ENDIF (NOT EXISTS ${EIGEN_INCLUDE})
MESSAGE("-- Found Eigen 3.x: ${EIGEN_INCLUDE}")


INCLUDE_DIRECTORIES(
  ${GLOG_INCLUDE}
  ${EIGEN_INCLUDE}
  )