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No need to explain this over and over again. While at it, do some other minor cleanups to whitespace and comments (i.e. delete them).
230 lines
7.1 KiB
CMake
230 lines
7.1 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#.rst:
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# FindOpenSceneGraph
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# ------------------
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#
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# Find OpenSceneGraph
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#
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# This module searches for the OpenSceneGraph core "osg" library as well
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# as OpenThreads, and whatever additional COMPONENTS (nodekits) that you
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# specify.
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#
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# ::
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#
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# See http://www.openscenegraph.org
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#
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#
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#
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# NOTE: To use this module effectively you must either require CMake >=
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# 2.6.3 with cmake_minimum_required(VERSION 2.6.3) or download and place
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# FindOpenThreads.cmake, Findosg_functions.cmake, Findosg.cmake, and
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# Find<etc>.cmake files into your CMAKE_MODULE_PATH.
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#
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# ==================================
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#
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# This module accepts the following variables (note mixed case)
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#
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# ::
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#
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# OpenSceneGraph_DEBUG - Enable debugging output
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#
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#
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#
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# ::
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#
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# OpenSceneGraph_MARK_AS_ADVANCED - Mark cache variables as advanced
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# automatically
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#
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#
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#
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# The following environment variables are also respected for finding the
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# OSG and it's various components. CMAKE_PREFIX_PATH can also be used
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# for this (see find_library() CMake documentation).
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#
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# ``<MODULE>_DIR``
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# (where MODULE is of the form "OSGVOLUME" and there is a FindosgVolume.cmake file)
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# ``OSG_DIR``
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# ..
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# ``OSGDIR``
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# ..
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# ``OSG_ROOT``
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# ..
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#
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#
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# [CMake 2.8.10]: The CMake variable OSG_DIR can now be used as well to
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# influence detection, instead of needing to specify an environment
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# variable.
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#
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# This module defines the following output variables:
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#
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# ::
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#
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# OPENSCENEGRAPH_FOUND - Was the OSG and all of the specified components found?
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#
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#
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#
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# ::
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#
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# OPENSCENEGRAPH_VERSION - The version of the OSG which was found
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#
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#
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#
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# ::
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#
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# OPENSCENEGRAPH_INCLUDE_DIRS - Where to find the headers
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#
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#
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#
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# ::
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#
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# OPENSCENEGRAPH_LIBRARIES - The OSG libraries
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#
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#
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#
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# ================================== Example Usage:
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#
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# ::
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#
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# find_package(OpenSceneGraph 2.0.0 REQUIRED osgDB osgUtil)
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# # libOpenThreads & libosg automatically searched
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# include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS})
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#
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#
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#
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# ::
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#
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# add_executable(foo foo.cc)
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# target_link_libraries(foo ${OPENSCENEGRAPH_LIBRARIES})
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#
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# Naming convention:
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# Local variables of the form _osg_foo
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# Input variables of the form OpenSceneGraph_FOO
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# Output variables of the form OPENSCENEGRAPH_FOO
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#
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include(${CMAKE_CURRENT_LIST_DIR}/Findosg_functions.cmake)
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set(_osg_modules_to_process)
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foreach(_osg_component ${OpenSceneGraph_FIND_COMPONENTS})
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list(APPEND _osg_modules_to_process ${_osg_component})
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endforeach()
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list(APPEND _osg_modules_to_process "osg" "OpenThreads")
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list(REMOVE_DUPLICATES _osg_modules_to_process)
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if(OpenSceneGraph_DEBUG)
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message(STATUS "[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
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"Components = ${_osg_modules_to_process}")
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endif()
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#
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# First we need to find and parse osg/Version
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#
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OSG_FIND_PATH(OSG osg/Version)
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if(OpenSceneGraph_MARK_AS_ADVANCED)
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OSG_MARK_AS_ADVANCED(OSG)
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endif()
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# Try to ascertain the version...
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if(OSG_INCLUDE_DIR)
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if(OpenSceneGraph_DEBUG)
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message(STATUS "[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
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"Detected OSG_INCLUDE_DIR = ${OSG_INCLUDE_DIR}")
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endif()
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set(_osg_Version_file "${OSG_INCLUDE_DIR}/osg/Version")
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if("${OSG_INCLUDE_DIR}" MATCHES "\\.framework$" AND NOT EXISTS "${_osg_Version_file}")
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set(_osg_Version_file "${OSG_INCLUDE_DIR}/Headers/Version")
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endif()
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if(EXISTS "${_osg_Version_file}")
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file(STRINGS "${_osg_Version_file}" _osg_Version_contents
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REGEX "#define (OSG_VERSION_[A-Z]+|OPENSCENEGRAPH_[A-Z]+_VERSION)[ \t]+[0-9]+")
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else()
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set(_osg_Version_contents "unknown")
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endif()
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string(REGEX MATCH ".*#define OSG_VERSION_MAJOR[ \t]+[0-9]+.*"
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_osg_old_defines "${_osg_Version_contents}")
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string(REGEX MATCH ".*#define OPENSCENEGRAPH_MAJOR_VERSION[ \t]+[0-9]+.*"
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_osg_new_defines "${_osg_Version_contents}")
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if(_osg_old_defines)
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string(REGEX REPLACE ".*#define OSG_VERSION_MAJOR[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_MAJOR ${_osg_Version_contents})
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string(REGEX REPLACE ".*#define OSG_VERSION_MINOR[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_MINOR ${_osg_Version_contents})
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string(REGEX REPLACE ".*#define OSG_VERSION_PATCH[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_PATCH ${_osg_Version_contents})
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elseif(_osg_new_defines)
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string(REGEX REPLACE ".*#define OPENSCENEGRAPH_MAJOR_VERSION[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_MAJOR ${_osg_Version_contents})
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string(REGEX REPLACE ".*#define OPENSCENEGRAPH_MINOR_VERSION[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_MINOR ${_osg_Version_contents})
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string(REGEX REPLACE ".*#define OPENSCENEGRAPH_PATCH_VERSION[ \t]+([0-9]+).*"
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"\\1" _osg_VERSION_PATCH ${_osg_Version_contents})
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else()
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message(WARNING "[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
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"Failed to parse version number, please report this as a bug")
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endif()
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unset(_osg_Version_contents)
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set(OPENSCENEGRAPH_VERSION "${_osg_VERSION_MAJOR}.${_osg_VERSION_MINOR}.${_osg_VERSION_PATCH}"
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CACHE INTERNAL "The version of OSG which was detected")
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if(OpenSceneGraph_DEBUG)
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message(STATUS "[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
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"Detected version ${OPENSCENEGRAPH_VERSION}")
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endif()
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endif()
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set(_osg_quiet)
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if(OpenSceneGraph_FIND_QUIETLY)
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set(_osg_quiet "QUIET")
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endif()
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#
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# Here we call find_package() on all of the components
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#
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foreach(_osg_module ${_osg_modules_to_process})
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if(OpenSceneGraph_DEBUG)
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message(STATUS "[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
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"Calling find_package(${_osg_module} ${_osg_required} ${_osg_quiet})")
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endif()
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find_package(${_osg_module} ${_osg_quiet})
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string(TOUPPER ${_osg_module} _osg_module_UC)
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# append to list if module was found OR is required
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if( ${_osg_module_UC}_FOUND OR OpenSceneGraph_FIND_REQUIRED )
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list(APPEND OPENSCENEGRAPH_INCLUDE_DIR ${${_osg_module_UC}_INCLUDE_DIR})
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list(APPEND OPENSCENEGRAPH_LIBRARIES ${${_osg_module_UC}_LIBRARIES})
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endif()
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if(OpenSceneGraph_MARK_AS_ADVANCED)
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OSG_MARK_AS_ADVANCED(${_osg_module})
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endif()
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endforeach()
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if(OPENSCENEGRAPH_INCLUDE_DIR)
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list(REMOVE_DUPLICATES OPENSCENEGRAPH_INCLUDE_DIR)
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endif()
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#
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# Check each module to see if it's found
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#
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set(_osg_component_founds)
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if(OpenSceneGraph_FIND_REQUIRED)
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foreach(_osg_module ${_osg_modules_to_process})
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string(TOUPPER ${_osg_module} _osg_module_UC)
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list(APPEND _osg_component_founds ${_osg_module_UC}_FOUND)
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endforeach()
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenSceneGraph
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REQUIRED_VARS OPENSCENEGRAPH_LIBRARIES OPENSCENEGRAPH_INCLUDE_DIR ${_osg_component_founds}
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VERSION_VAR OPENSCENEGRAPH_VERSION)
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unset(_osg_component_founds)
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set(OPENSCENEGRAPH_INCLUDE_DIRS ${OPENSCENEGRAPH_INCLUDE_DIR})
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