# OpenThreads is a C++ based threading library. Its largest userbase

# seems to OpenSceneGraph so you might notice I accept OSGDIR as an

# environment path.

# I consider this part of the Findosg* suite used to find OpenSceneGraph

# components.

# Each component is separate and you must opt in to each module.

#

# Locate OpenThreads

# This module defines

# OPENTHREADS_LIBRARY

# OPENTHREADS_FOUND, if false, do not try to link to OpenThreads

# OPENTHREADS_INCLUDE_DIR, where to find the headers

#

# $OPENTHREADS_DIR is an environment variable that would

# correspond to the ./configure --prefix=$OPENTHREADS_DIR

# used in building osg.

#

# Created by Eric Wing.

# prefer FindOpenThreads from cmake distribution

if(EXISTS ${CMAKE_ROOT}/Modules/FindOpenThreads.cmake)

include(${CMAKE_ROOT}/Modules/FindOpenThreads.cmake)

if(OPENTHREADS_FOUND)

return()

endif()

endif()

# Header files are presumed to be included like

# #include <OpenThreads/Thread>

# To make it easier for one-step automated configuration/builds,

# we leverage environmental paths. This is preferable

# to the -DVAR=value switches because it insulates the

# users from changes we may make in this script.

# It also offers a little more flexibility than setting

# the CMAKE_*_PATH since we can target specific components.

# However, the default CMake behavior will search system paths

# before anything else. This is problematic in the cases

# where you have an older (stable) version installed, but

# are trying to build a newer version.

# CMake doesn't offer a nice way to globally control this behavior

# so we have to do a nasty "double FIND_" in this module.

# The first FIND disables the CMAKE_ search paths and only checks

# the environmental paths.

# If nothing is found, then the second find will search the

# standard install paths.

# Explicit -DVAR=value arguments should still be able to override everything.

# Note: We have added an additional check for ${CMAKE_PREFIX_PATH}.

# This is not an official CMake variable, but one we are proposing be

# added to CMake. Be warned that this may go away or the variable name

# may change.

FIND_PATH(OPENTHREADS_INCLUDE_DIR OpenThreads/Thread

PATHS

$ENV{OPENTHREADS_INCLUDE_DIR}

$ENV{OPENTHREADS_DIR}/include

$ENV{OPENTHREADS_DIR}

$ENV{OSG_INCLUDE_DIR}

$ENV{OSG_DIR}/include

$ENV{OSG_DIR}

$ENV{OSGDIR}/include

$ENV{OSGDIR}

NO_DEFAULT_PATH

)

FIND_PATH(OPENTHREADS_INCLUDE_DIR OpenThreads/Thread

PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.

NO_DEFAULT_PATH

PATH_SUFFIXES include

)

FIND_PATH(OPENTHREADS_INCLUDE_DIR OpenThreads/Thread

~/Library/Frameworks

/Library/Frameworks

/usr/local/include

/usr/include

/sw/include # Fink

/opt/local/include # DarwinPorts

/opt/csw/include # Blastwave

/opt/include

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OpenThreads_ROOT]/include

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OSG_ROOT]/include

)

FIND_LIBRARY(OPENTHREADS_LIBRARY

NAMES OpenThreads OpenThreadsWin32

PATHS

$ENV{OPENTHREADS_LIBRARY_DIR}

$ENV{OPENTHREADS_DIR}/lib64

$ENV{OPENTHREADS_DIR}/lib

$ENV{OPENTHREADS_DIR}

$ENV{OSG_LIBRARY_DIR}

$ENV{OSG_DIR}/lib64

$ENV{OSG_DIR}/lib

$ENV{OSG_DIR}

$ENV{OSGDIR}/lib64

$ENV{OSGDIR}/lib

$ENV{OSGDIR}

NO_DEFAULT_PATH

)

FIND_LIBRARY(OPENTHREADS_LIBRARY

NAMES OpenThreads OpenThreadsWin32

PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.

NO_DEFAULT_PATH

PATH_SUFFIXES lib64 lib

)

FIND_LIBRARY(OPENTHREADS_LIBRARY

NAMES OpenThreads OpenThreadsWin32

PATHS

~/Library/Frameworks

/Library/Frameworks

/usr/local/lib64

/usr/local/lib

/usr/lib64

/usr/lib

/sw/lib64

/sw/lib

/opt/local/lib64

/opt/local/lib

/opt/csw/lib64

/opt/csw/lib

/opt/lib64

/opt/lib

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OpenThreads_ROOT]/lib

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OSG_ROOT]/lib

)

FIND_LIBRARY(OPENTHREADS_LIBRARY_DEBUG

NAMES OpenThreadsd OpenThreadsWin32d

PATHS

$ENV{OPENTHREADS_DEBUG_LIBRARY_DIR}

$ENV{OPENTHREADS_LIBRARY_DIR}

$ENV{OPENTHREADS_DIR}/lib64

$ENV{OPENTHREADS_DIR}/lib

$ENV{OPENTHREADS_DIR}

$ENV{OSG_LIBRARY_DIR}

$ENV{OSG_DIR}/lib64

$ENV{OSG_DIR}/lib

$ENV{OSG_DIR}

$ENV{OSGDIR}/lib64

$ENV{OSGDIR}/lib

$ENV{OSGDIR}

NO_DEFAULT_PATH

)

FIND_LIBRARY(OPENTHREADS_LIBRARY_DEBUG

NAMES OpenThreadsd OpenThreadsWin32d

PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.

NO_DEFAULT_PATH

PATH_SUFFIXES lib64 lib

)

FIND_LIBRARY(OPENTHREADS_LIBRARY_DEBUG

NAMES OpenThreadsd OpenThreadsWin32d

PATHS

/usr/local/lib64

/usr/local/lib

/usr/lib64

/usr/lib

/sw/lib64

/sw/lib

/opt/local/lib64

/opt/local/lib

/opt/csw/lib64

/opt/csw/lib

/opt/lib64

/opt/lib

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OpenThreads_ROOT]/lib

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session\ Manager\\Environment;OSG_ROOT]/lib

)

IF(OPENTHREADS_LIBRARY)

IF(NOT OPENTHREADS_LIBRARY_DEBUG)

#MESSAGE("-- Warning Debug OpenThreads not found, using: ${OPENTHREADS_LIBRARY}")

#SET(OPENTHREADS_LIBRARY_DEBUG "${OPENTHREADS_LIBRARY}")

SET(OPENTHREADS_LIBRARY_DEBUG "${OPENTHREADS_LIBRARY}" CACHE FILEPATH "Debug version of OpenThreads Library (use regular version if not available)" FORCE)

ENDIF(NOT OPENTHREADS_LIBRARY_DEBUG)

ENDIF(OPENTHREADS_LIBRARY)

SET(OPENTHREADS_FOUND "NO")

IF(OPENTHREADS_INCLUDE_DIR AND OPENTHREADS_LIBRARY)

SET(OPENTHREADS_FOUND "YES")

# MESSAGE("-- Found OpenThreads: "${OPENTHREADS_LIBRARY})

ENDIF(OPENTHREADS_INCLUDE_DIR AND OPENTHREADS_LIBRARY)