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167 lines
6.1 KiB
167 lines
6.1 KiB
# - This module determines the thread library of the system.
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# The following variables are set
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# CMAKE_THREAD_LIBS_INIT - the thread library
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# CMAKE_USE_SPROC_INIT - are we using sproc?
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# CMAKE_USE_WIN32_THREADS_INIT - using WIN32 threads?
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# CMAKE_USE_PTHREADS_INIT - are we using pthreads
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# CMAKE_HP_PTHREADS_INIT - are we using hp pthreads
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# For systems with multiple thread libraries, caller can set
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# CMAKE_THREAD_PREFER_PTHREAD
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#=============================================================================
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# Copyright 2002-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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INCLUDE (CheckIncludeFiles)
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INCLUDE (CheckLibraryExists)
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INCLUDE (CheckSymbolExists)
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SET(Threads_FOUND FALSE)
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# Do we have sproc?
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IF(CMAKE_SYSTEM MATCHES IRIX AND NOT CMAKE_THREAD_PREFER_PTHREAD)
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CHECK_INCLUDE_FILES("sys/types.h;sys/prctl.h" CMAKE_HAVE_SPROC_H)
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ENDIF()
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IF(CMAKE_HAVE_SPROC_H AND NOT CMAKE_THREAD_PREFER_PTHREAD)
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# We have sproc
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SET(CMAKE_USE_SPROC_INIT 1)
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ELSE()
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# Do we have pthreads?
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CHECK_INCLUDE_FILES("pthread.h" CMAKE_HAVE_PTHREAD_H)
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IF(CMAKE_HAVE_PTHREAD_H)
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#
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# We have pthread.h
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# Let's check for the library now.
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#
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SET(CMAKE_HAVE_THREADS_LIBRARY)
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IF(NOT THREADS_HAVE_PTHREAD_ARG)
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# Check if pthread functions are in normal C library
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CHECK_SYMBOL_EXISTS(pthread_create pthread.h CMAKE_HAVE_LIBC_CREATE)
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IF(CMAKE_HAVE_LIBC_CREATE)
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SET(CMAKE_THREAD_LIBS_INIT "")
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SET(CMAKE_HAVE_THREADS_LIBRARY 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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IF(NOT CMAKE_HAVE_THREADS_LIBRARY)
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# Do we have -lpthreads
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CHECK_LIBRARY_EXISTS(pthreads pthread_create "" CMAKE_HAVE_PTHREADS_CREATE)
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IF(CMAKE_HAVE_PTHREADS_CREATE)
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SET(CMAKE_THREAD_LIBS_INIT "-lpthreads")
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SET(CMAKE_HAVE_THREADS_LIBRARY 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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# Ok, how about -lpthread
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CHECK_LIBRARY_EXISTS(pthread pthread_create "" CMAKE_HAVE_PTHREAD_CREATE)
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IF(CMAKE_HAVE_PTHREAD_CREATE)
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SET(CMAKE_THREAD_LIBS_INIT "-lpthread")
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SET(CMAKE_HAVE_THREADS_LIBRARY 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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IF(CMAKE_SYSTEM MATCHES "SunOS.*")
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# On sun also check for -lthread
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CHECK_LIBRARY_EXISTS(thread thr_create "" CMAKE_HAVE_THR_CREATE)
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IF(CMAKE_HAVE_THR_CREATE)
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SET(CMAKE_THREAD_LIBS_INIT "-lthread")
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SET(CMAKE_HAVE_THREADS_LIBRARY 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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ENDIF(CMAKE_SYSTEM MATCHES "SunOS.*")
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ENDIF(NOT CMAKE_HAVE_THREADS_LIBRARY)
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ENDIF(NOT THREADS_HAVE_PTHREAD_ARG)
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IF(NOT CMAKE_HAVE_THREADS_LIBRARY)
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# If we did not found -lpthread, -lpthread, or -lthread, look for -pthread
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IF("THREADS_HAVE_PTHREAD_ARG" MATCHES "^THREADS_HAVE_PTHREAD_ARG")
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MESSAGE(STATUS "Check if compiler accepts -pthread")
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TRY_RUN(THREADS_PTHREAD_ARG THREADS_HAVE_PTHREAD_ARG
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${CMAKE_BINARY_DIR}
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${CMAKE_ROOT}/Modules/CheckForPthreads.c
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CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
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COMPILE_OUTPUT_VARIABLE OUTPUT)
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IF(THREADS_HAVE_PTHREAD_ARG)
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IF(THREADS_PTHREAD_ARG MATCHES "^2$")
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SET(Threads_FOUND TRUE)
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MESSAGE(STATUS "Check if compiler accepts -pthread - yes")
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ELSE()
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MESSAGE(STATUS "Check if compiler accepts -pthread - no")
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FILE(APPEND
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if compiler accepts -pthread returned ${THREADS_PTHREAD_ARG} instead of 2. The compiler had the following output:\n${OUTPUT}\n\n")
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ENDIF()
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ELSE()
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MESSAGE(STATUS "Check if compiler accepts -pthread - no")
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FILE(APPEND
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if compiler accepts -pthread failed with the following output:\n${OUTPUT}\n\n")
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ENDIF()
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ENDIF("THREADS_HAVE_PTHREAD_ARG" MATCHES "^THREADS_HAVE_PTHREAD_ARG")
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IF(THREADS_HAVE_PTHREAD_ARG)
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SET(Threads_FOUND TRUE)
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SET(CMAKE_THREAD_LIBS_INIT "-pthread")
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ENDIF()
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ENDIF(NOT CMAKE_HAVE_THREADS_LIBRARY)
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ENDIF(CMAKE_HAVE_PTHREAD_H)
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ENDIF()
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IF(CMAKE_THREAD_LIBS_INIT OR CMAKE_HAVE_LIBC_CREATE)
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SET(CMAKE_USE_PTHREADS_INIT 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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IF(CMAKE_SYSTEM MATCHES "Windows")
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SET(CMAKE_USE_WIN32_THREADS_INIT 1)
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SET(Threads_FOUND TRUE)
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ENDIF()
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IF(CMAKE_USE_PTHREADS_INIT)
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IF(CMAKE_SYSTEM MATCHES "HP-UX-*")
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# Use libcma if it exists and can be used. It provides more
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# symbols than the plain pthread library. CMA threads
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# have actually been deprecated:
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# http://docs.hp.com/en/B3920-90091/ch12s03.html#d0e11395
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# http://docs.hp.com/en/947/d8.html
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# but we need to maintain compatibility here.
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# The CMAKE_HP_PTHREADS setting actually indicates whether CMA threads
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# are available.
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CHECK_LIBRARY_EXISTS(cma pthread_attr_create "" CMAKE_HAVE_HP_CMA)
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IF(CMAKE_HAVE_HP_CMA)
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SET(CMAKE_THREAD_LIBS_INIT "-lcma")
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SET(CMAKE_HP_PTHREADS_INIT 1)
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SET(Threads_FOUND TRUE)
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ENDIF(CMAKE_HAVE_HP_CMA)
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SET(CMAKE_USE_PTHREADS_INIT 1)
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ENDIF()
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IF(CMAKE_SYSTEM MATCHES "OSF1-V*")
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SET(CMAKE_USE_PTHREADS_INIT 0)
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SET(CMAKE_THREAD_LIBS_INIT )
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ENDIF()
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IF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
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SET(CMAKE_USE_PTHREADS_INIT 1)
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SET(Threads_FOUND TRUE)
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SET(CMAKE_THREAD_LIBS_INIT )
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SET(CMAKE_USE_WIN32_THREADS_INIT 0)
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ENDIF()
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ENDIF(CMAKE_USE_PTHREADS_INIT)
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INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG Threads_FOUND)
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