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CMake/Modules/FindOpenSceneGraph.cmake

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# - Find OpenSceneGraph
# This module searches for the OpenSceneGraph core "osg" library as well as
# OpenThreads, and whatever additional COMPONENTS (nodekits) that you specify.
# See http://www.openscenegraph.org
#
# NOTE: To use this module effectively you must either require CMake >= 2.6.3
# with cmake_minimum_required(VERSION 2.6.3) or download and place
# FindOpenThreads.cmake, Findosg_functions.cmake, Findosg.cmake,
# and Find<foo>.cmake files for whatever nodekits you need.
#
#==================================
#
# This module accepts the following variables (note mixed case)
#
# OpenSceneGraph_DEBUG - Enable debugging output
#
# OpenSceneGraph_MARK_AS_ADVANCED - Mark cache variables as advanced
# automatically
#
# The following environment variables are also respected for finding the OSG
# and it's various components. CMAKE_PREFIX_PATH can also be used for this
# (see find_library() CMake documentation).
#
# <MODULE>_DIR (where MODULE is of the form "OSGVOLUME" and there is a FindosgVolume.cmake file)
# OSG_DIR
# OSGDIR
# OSG_ROOT
#
# This module defines the following output variables:
#
# OPENSCENEGRAPH_FOUND - Was the OSG and all of the specified components found?
#
# OPENSCENEGRAPH_VERSION - The version of the OSG which was found
#
# OPENSCENEGRAPH_INCLUDE_DIRS - Where to find the headers
#
# OPENSCENEGRAPH_LIBRARIES - The OSG libraries
#
#==================================
# Example Usage:
#
# find_package(OpenSceneGraph 2.0.0 REQUIRED osgDB osgUtil)
# # libOpenThreads & libosg automatically searched
# include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS})
#
# add_executable(foo foo.cc)
# target_link_libraries(foo ${OPENSCENEGRAPH_LIBRARIES})
#
#==================================
#
# Naming convention:
# Local variables of the form _osg_foo
# Input variables of the form OpenSceneGraph_FOO
# Output variables of the form OPENSCENEGRAPH_FOO
#
# Copyright (c) 2009, Philip Lowman <philip@yhbt.com>
#
# Redistribution AND use is allowed according to the terms of the New
# BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
#
#==================================
include(Findosg_functions)
set(_osg_modules_to_process)
foreach(_osg_component ${OpenSceneGraph_FIND_COMPONENTS})
list(APPEND _osg_modules_to_process ${_osg_component})
endforeach()
list(APPEND _osg_modules_to_process "osg" "OpenThreads")
list(REMOVE_DUPLICATES _osg_modules_to_process)
if(OpenSceneGraph_DEBUG)
message("[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
"Components = ${_osg_modules_to_process}")
endif()
#
# First we need to find and parse osg/Version
#
OSG_FIND_PATH(OSG osg/Version)
if(OpenSceneGraph_MARK_AS_ADVANCED)
OSG_MARK_AS_ADVANCED(OSG)
endif()
# Try to ascertain the version...
if(OSG_INCLUDE_DIR)
if(OpenSceneGraph_DEBUG)
message("[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
"Detected OSG_INCLUDE_DIR = ${OSG_INCLUDE_DIR}")
endif()
file(READ "${OSG_INCLUDE_DIR}/osg/Version" _osg_Version_contents)
string(REGEX MATCH ".*#define OSG_VERSION_MAJOR[ \t]+[0-9]+.*"
_osg_old_defines ${_osg_Version_contents})
string(REGEX MATCH ".*#define OPENSCENEGRAPH_MAJOR_VERSION[ \t]+[0-9]+.*"
_osg_new_defines ${_osg_Version_contents})
if(_osg_old_defines)
string(REGEX REPLACE ".*#define OSG_VERSION_MAJOR[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_MAJOR ${_osg_Version_contents})
string(REGEX REPLACE ".*#define OSG_VERSION_MINOR[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_MINOR ${_osg_Version_contents})
string(REGEX REPLACE ".*#define OSG_VERSION_PATCH[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_PATCH ${_osg_Version_contents})
elseif(_osg_new_defines)
string(REGEX REPLACE ".*#define OPENSCENEGRAPH_MAJOR_VERSION[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_MAJOR ${_osg_Version_contents})
string(REGEX REPLACE ".*#define OPENSCENEGRAPH_MINOR_VERSION[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_MINOR ${_osg_Version_contents})
string(REGEX REPLACE ".*#define OPENSCENEGRAPH_PATCH_VERSION[ \t]+([0-9]+).*"
"\\1" _osg_VERSION_PATCH ${_osg_Version_contents})
else()
message("[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
"Failed to parse version number, please report this as a bug")
endif()
set(OPENSCENEGRAPH_VERSION "${_osg_VERSION_MAJOR}.${_osg_VERSION_MINOR}.${_osg_VERSION_PATCH}"
CACHE INTERNAL "The version of OSG which was detected")
if(OpenSceneGraph_DEBUG)
message("[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
"Detected version ${OPENSCENEGRAPH_VERSION}")
endif()
endif()
#
# Version checking
#
if(OpenSceneGraph_FIND_VERSION AND OPENSCENEGRAPH_VERSION)
if(OpenSceneGraph_FIND_VERSION_EXACT)
if(NOT OPENSCENEGRAPH_VERSION VERSION_EQUAL ${OpenSceneGraph_FIND_VERSION})
set(_osg_version_not_exact TRUE)
endif()
else()
# version is too low
if(NOT OPENSCENEGRAPH_VERSION VERSION_EQUAL ${OpenSceneGraph_FIND_VERSION} AND
NOT OPENSCENEGRAPH_VERSION VERSION_GREATER ${OpenSceneGraph_FIND_VERSION})
set(_osg_version_not_high_enough TRUE)
endif()
endif()
endif()
set(_osg_quiet)
if(OpenSceneGraph_FIND_QUIETLY)
set(_osg_quiet "QUIET")
endif()
#
# Here we call FIND_PACKAGE() on all of the components
#
foreach(_osg_module ${_osg_modules_to_process})
if(OpenSceneGraph_DEBUG)
message("[ FindOpenSceneGraph.cmake:${CMAKE_CURRENT_LIST_LINE} ] "
"Calling find_package(${_osg_module} ${_osg_required} ${_osg_quiet})")
endif()
find_package(${_osg_module} ${_osg_quiet})
string(TOUPPER ${_osg_module} _osg_module_UC)
list(APPEND OPENSCENEGRAPH_INCLUDE_DIR ${${_osg_module_UC}_INCLUDE_DIR})
list(APPEND OPENSCENEGRAPH_LIBRARIES ${${_osg_module_UC}_LIBRARIES})
if(OpenSceneGraph_MARK_AS_ADVANCED)
OSG_MARK_AS_ADVANCED(${_osg_module})
endif()
endforeach()
if(OPENSCENEGRAPH_INCLUDE_DIR)
list(REMOVE_DUPLICATES OPENSCENEGRAPH_INCLUDE_DIR)
endif()
#
# Inform the users with an error message based on
# what version they have vs. what version was
# required.
#
if(OpenSceneGraph_FIND_REQUIRED)
set(_osg_version_output_type FATAL_ERROR)
else()
set(_osg_version_output_type STATUS)
endif()
if(_osg_version_not_high_enough)
set(_osg_EPIC_FAIL TRUE)
if(NOT OpenSceneGraph_FIND_QUIETLY)
message(${_osg_version_output_type}
"ERROR: Version ${OpenSceneGraph_FIND_VERSION} or higher of the OSG "
"is required. Version ${OPENSCENEGRAPH_VERSION} was found.")
endif()
elseif(_osg_version_not_exact)
set(_osg_EPIC_FAIL TRUE)
if(NOT OpenSceneGraph_FIND_QUIETLY)
message(${_osg_version_output_type}
"ERROR: Version ${OpenSceneGraph_FIND_VERSION} of the OSG is required "
"(exactly), version ${OPENSCENEGRAPH_VERSION} was found.")
endif()
else()
#
# Check each module to see if it's found
#
if(OpenSceneGraph_FIND_REQUIRED)
set(_osg_missing_message)
foreach(_osg_module ${_osg_modules_to_process})
string(TOUPPER ${_osg_module} _osg_module_UC)
if(NOT ${_osg_module_UC}_FOUND)
set(_osg_missing_nodekit_fail true)
set(_osg_missing_message "${_osg_missing_message} ${_osg_module}")
endif()
endforeach()
if(_osg_missing_nodekit_fail)
message(FATAL_ERROR "ERROR: Missing the following osg "
"libraries: ${_osg_missing_message}.\n"
"Consider using CMAKE_PREFIX_PATH or the OSG_DIR "
"environment variable. See the "
"${CMAKE_CURRENT_LIST_FILE} for more details.")
endif()
endif()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenSceneGraph DEFAULT_MSG OPENSCENEGRAPH_LIBRARIES OPENSCENEGRAPH_INCLUDE_DIR)
endif()
if(_osg_EPIC_FAIL)
# Zero out everything, we didn't meet version requirements
set(OPENSCENEGRAPH_FOUND FALSE)
set(OPENSCENEGRAPH_LIBRARIES)
set(OPENSCENEGRAPH_INCLUDE_DIR)
endif()
set(OPENSCENEGRAPH_INCLUDE_DIRS ${OPENSCENEGRAPH_INCLUDE_DIR})
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