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#
# Find an ITK installation or build tree.
#
# When ITK is found, the ITKConfig.cmake file is sourced to setup the
# location and configuration of ITK. Please read this file, or
# ITKConfig.cmake.in from the ITK source tree for the full list of
# definitions. Of particular interest is
#
# ITK_USE_FILE - A CMake source file that can be included
# to set the include directories, library
# directories, and preprocessor macros.
#
# In addition to the variables read from ITKConfig.cmake, this find
# module also defines
#
# ITK_DIR - The directory containing ITKConfig.cmake. This is either
# the root of the build tree, or the lib/InsightToolkit
# directory. This is the only cache entry.
#
# ITK_FOUND - Whether ITK was found. If this is true, ITK_DIR is okay.
#
# USE_ITK_FILE - The full path to the UseITK.cmake file. This is provided
# for backward compatability. Use ITK_USE_FILE instead.
#
SET(ITK_DIR_STRING "directory containing ITKConfig.cmake. This is either the root of the build tree, or PREFIX/lib/InsightToolkit for an installation.")
# Search only if the location is not already known.
IF(NOT ITK_DIR)
# Get the system search path as a list.
IF(UNIX)
STRING(REGEX MATCHALL "[^:]+" ITK_DIR_SEARCH1 "$ENV{PATH}")
ELSE(UNIX)
STRING(REGEX REPLACE "\\\\" "/" ITK_DIR_SEARCH1 "$ENV{PATH}")
ENDIF(UNIX)
STRING(REGEX REPLACE "/;" ";" ITK_DIR_SEARCH2 ${ITK_DIR_SEARCH1})
# Construct a set of paths relative to the system search path.
SET(ITK_DIR_SEARCH "")
FOREACH(dir ${ITK_DIR_SEARCH2})
SET(ITK_DIR_SEARCH ${ITK_DIR_SEARCH} "${dir}/../lib/InsightToolkit")
ENDFOREACH(dir)
#
# Look for an installation or build tree.
#
FIND_PATH(ITK_DIR ITKConfig.cmake
# Look for an environment variable ITK_DIR.
$ENV{ITK_DIR}
# Look in places relative to the system executable search path.
${ITK_DIR_SEARCH}
# Look in standard UNIX install locations.
/usr/local/lib/InsightToolkit
/usr/lib/InsightToolkit
# Read from the CMakeSetup registry entries. It is likely that
# ITK will have been recently built.
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild1]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild2]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild3]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild4]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild5]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild6]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild7]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild8]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild9]
[HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild10]
# Help the user find it if we cannot.
DOC "The ${ITK_DIR_STRING}"
)
ENDIF(NOT ITK_DIR)
# If ITK was found, load the configuration file to get the rest of the
# settings.
IF(ITK_DIR)
SET(ITK_FOUND 1)
INCLUDE(${ITK_DIR}/ITKConfig.cmake)
# Set USE_ITK_FILE for backward-compatability.
SET(USE_ITK_FILE ${ITK_USE_FILE})
ELSE(ITK_DIR)
SET(ITK_FOUND 0)
IF(ITK_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Please set ITK_DIR to the ${ITK_DIR_STRING}")
ENDIF(ITK_FIND_REQUIRED)
ENDIF(ITK_DIR)
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