# @HEADER
# ************************************************************************
#
#            Trilinos: An Object-Oriented Solver Framework
#                 Copyright (2001) Sandia Corporation
#
#
# Copyright (2001) Sandia Corporation. Under the terms of Contract
# DE-AC04-94AL85000, there is a non-exclusive license for use of this
# work by or on behalf of the U.S. Government.  Export of this program
# may require a license from the United States Government.
#
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# notice, this list of conditions and the following disclaimer in the
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# 3. Neither the name of the Corporation nor the names of the
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# NOTICE:  The United States Government is granted for itself and others
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# ************************************************************************
# @HEADER


SET(USE_THREADS FALSE)

IF(NOT TPL_Pthread_INCLUDE_DIRS AND NOT TPL_Pthread_LIBRARY_DIRS AND NOT TPL_Pthread_LIBRARIES)
  # Use CMake's Thread finder since it is a bit smarter in determining
  # whether pthreads is already built into the compiler and doesn't need
  # a library to link.
  FIND_PACKAGE(Threads)
  #If Threads found a copy of pthreads make sure it is one of the cases the tribits
  #tpl system cannot handle.
  IF(Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
    IF(CMAKE_THREAD_LIBS_INIT STREQUAL "" OR CMAKE_THREAD_LIBS_INIT STREQUAL "-pthread")
      SET(USE_THREADS TRUE)
    ENDIF()
  ENDIF()
ENDIF()

IF(USE_THREADS)
  SET(TPL_Pthread_INCLUDE_DIRS "")
  SET(TPL_Pthread_LIBRARIES "${CMAKE_THREAD_LIBS_INIT}")
  SET(TPL_Pthread_LIBRARY_DIRS "")
  TIBITS_CREATE_IMPORTED_TPL_LIBRARY(Pthread)
ELSE()
  TRIBITS_TPL_FIND_INCLUDE_DIRS_AND_LIBRARIES( Pthread
    REQUIRED_HEADERS pthread.h
    REQUIRED_LIBS_NAMES pthread
      )
ENDIF()