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//usr/share/cmake/Modules/FindArmadillo.cmake

# - Find Armadillo
# Find the Armadillo C++ library
#
# Using Armadillo:
#  find_package(Armadillo REQUIRED)
#  include_directories(${ARMADILLO_INCLUDE_DIRS})
#  add_executable(foo foo.cc)
#  target_link_libraries(foo ${ARMADILLO_LIBRARIES})
# This module sets the following variables:
#  ARMADILLO_FOUND - set to true if the library is found
#  ARMADILLO_INCLUDE_DIRS - list of required include directories
#  ARMADILLO_LIBRARIES - list of libraries to be linked
#  ARMADILLO_VERSION_MAJOR - major version number
#  ARMADILLO_VERSION_MINOR - minor version number
#  ARMADILLO_VERSION_PATCH - patch version number
#  ARMADILLO_VERSION_STRING - version number as a string (ex: "1.0.4")
#  ARMADILLO_VERSION_NAME - name of the version (ex: "Antipodean Antileech")

#=============================================================================
# Copyright 2011 Clement Creusot <creusot@cs.york.ac.uk>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)

# UNIX paths are standard, no need to write.
find_library(ARMADILLO_LIBRARY
  NAMES armadillo
  PATHS "$ENV{ProgramFiles}/Armadillo/lib"  "$ENV{ProgramFiles}/Armadillo/lib64" "$ENV{ProgramFiles}/Armadillo"
  )
find_path(ARMADILLO_INCLUDE_DIR
  NAMES armadillo
  PATHS "$ENV{ProgramFiles}/Armadillo/include"
  )

if(ARMADILLO_INCLUDE_DIR)

# ------------------------------------------------------------------------
  #  Extract version information from <armadillo>
  # ------------------------------------------------------------------------

# WARNING: Early releases of Armadillo didn't have the arma_version.hpp file.
  # (e.g. v.0.9.8-1 in ubuntu maverick packages (2001-03-15))
  # If the file is missing, set all values to 0
  set(ARMADILLO_VERSION_MAJOR 0)
  set(ARMADILLO_VERSION_MINOR 0)
  set(ARMADILLO_VERSION_PATCH 0)
  set(ARMADILLO_VERSION_NAME "EARLY RELEASE")

if(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/arma_version.hpp")

# Read and parse armdillo version header file for version number
    file(STRINGS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/arma_version.hpp" _armadillo_HEADER_CONTENTS REGEX "#define ARMA_VERSION_[A-Z]+ ")
    string(REGEX REPLACE ".*#define ARMA_VERSION_MAJOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MAJOR "${_armadillo_HEADER_CONTENTS}")
    string(REGEX REPLACE ".*#define ARMA_VERSION_MINOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MINOR "${_armadillo_HEADER_CONTENTS}")
    string(REGEX REPLACE ".*#define ARMA_VERSION_PATCH ([0-9]+).*" "\\1" ARMADILLO_VERSION_PATCH "${_armadillo_HEADER_CONTENTS}")

# WARNING: The number of spaces before the version name is not one.
    string(REGEX REPLACE ".*#define ARMA_VERSION_NAME +\"([0-9a-zA-Z _-]+)\".*" "\\1" ARMADILLO_VERSION_NAME "${_armadillo_HEADER_CONTENTS}")

unset(_armadillo_HEADER_CONTENTS)
  endif()

set(ARMADILLO_VERSION_STRING "${ARMADILLO_VERSION_MAJOR}.${ARMADILLO_VERSION_MINOR}.${ARMADILLO_VERSION_PATCH}")
endif ()

#======================

# Checks 'REQUIRED', 'QUIET' and versions.
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(Armadillo
  REQUIRED_VARS ARMADILLO_LIBRARY ARMADILLO_INCLUDE_DIR
  VERSION_VAR ARMADILLO_VERSION_STRING)
# version_var fails with cmake < 2.8.4.

if (ARMADILLO_FOUND)
  set(ARMADILLO_INCLUDE_DIRS ${ARMADILLO_INCLUDE_DIR})
  set(ARMADILLO_LIBRARIES ${ARMADILLO_LIBRARY})
endif ()

# Hide internal variables
mark_as_advanced(
  ARMADILLO_INCLUDE_DIR
  ARMADILLO_LIBRARY)

#======================