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247 lines
8.5 KiB
247 lines
8.5 KiB
13 years ago
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# Updated FindThreads.cmake that supports pthread-win32
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# Downloaded from http://www.vtk.org/Bug/bug_view_advanced_page.php?bug_id=6399
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# - This module determines the thread library of the system.
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#
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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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#
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# If use of pthreads-win32 is desired, the following variables
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# can be set.
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#
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# THREADS_USE_PTHREADS_WIN32 -
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# Setting this to true searches for the pthreads-win32
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# port (since CMake 2.8.0)
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#
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# THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME
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# C = no exceptions (default)
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# (NOTE: This is the default scheme on most POSIX thread
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# implementations and what you should probably be using)
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# CE = C++ Exception Handling
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# SE = Structure Exception Handling (MSVC only)
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# (NOTE: Changing this option from the default may affect
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# the portability of your application. See pthreads-win32
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# documentation for more details.)
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#
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#======================================================
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# Example usage where threading library
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# is provided by the system:
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#
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# find_package(Threads REQUIRED)
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# add_executable(foo foo.cc)
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# target_link_libraries(foo ${CMAKE_THREAD_LIBS_INIT})
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#
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# Example usage if pthreads-win32 is desired on Windows
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# or a system provided thread library:
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#
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# set(THREADS_USE_PTHREADS_WIN32 true)
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# find_package(Threads REQUIRED)
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# include_directories(${THREADS_PTHREADS_INCLUDE_DIR})
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#
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# add_executable(foo foo.cc)
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# target_link_libraries(foo ${CMAKE_THREAD_LIBS_INIT})
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#
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INCLUDE (CheckIncludeFiles)
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INCLUDE (CheckLibraryExists)
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SET(Threads_FOUND FALSE)
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IF(WIN32 AND NOT CYGWIN AND THREADS_USE_PTHREADS_WIN32)
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SET(_Threads_ptwin32 true)
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ENDIF()
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# Do we have sproc?
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IF(CMAKE_SYSTEM MATCHES IRIX)
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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)
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# We have sproc
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SET(CMAKE_USE_SPROC_INIT 1)
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ELSEIF(_Threads_ptwin32)
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IF(NOT DEFINED THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME)
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# Assign the default scheme
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SET(THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME "C")
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ELSE()
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# Validate the scheme specified by the user
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IF(NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "C" AND
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NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "CE" AND
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NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
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MESSAGE(FATAL_ERROR "See documentation for FindPthreads.cmake, only C, CE, and SE modes are allowed")
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ENDIF()
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IF(NOT MSVC AND THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
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MESSAGE(FATAL_ERROR "Structured Exception Handling is only allowed for MSVC")
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ENDIF(NOT MSVC AND THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
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ENDIF()
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FIND_PATH(THREADS_PTHREADS_INCLUDE_DIR pthread.h)
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# Determine the library filename
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IF(MSVC)
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SET(_Threads_pthreads_libname
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pthreadV${THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME}2)
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ELSEIF(MINGW)
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SET(_Threads_pthreads_libname
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pthreadG${THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME}2)
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ELSE()
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MESSAGE(FATAL_ERROR "This should never happen")
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ENDIF()
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# Use the include path to help find the library if possible
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SET(_Threads_lib_paths "")
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IF(THREADS_PTHREADS_INCLUDE_DIR)
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GET_FILENAME_COMPONENT(_Threads_root_dir
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${THREADS_PTHREADS_INCLUDE_DIR} PATH)
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SET(_Threads_lib_paths ${_Threads_root_dir}/lib)
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ENDIF()
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FIND_LIBRARY(THREADS_PTHREADS_WIN32_LIBRARY
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NAMES ${_Threads_pthreads_libname}
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PATHS ${_Threads_lib_paths}
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DOC "The Portable Threads Library for Win32"
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NO_SYSTEM_PATH
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)
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IF(THREADS_PTHREADS_INCLUDE_DIR AND THREADS_PTHREADS_WIN32_LIBRARY)
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MARK_AS_ADVANCED(THREADS_PTHREADS_INCLUDE_DIR)
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SET(CMAKE_THREAD_LIBS_INIT ${THREADS_PTHREADS_WIN32_LIBRARY})
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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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MARK_AS_ADVANCED(THREADS_PTHREADS_WIN32_LIBRARY)
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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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# 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(Threads_FOUND TRUE)
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SET(CMAKE_HAVE_THREADS_LIBRARY 1)
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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 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)
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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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AND NOT THREADS_USE_PTHREADS_WIN32)
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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(FindPackageHandleStandardArgs)
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IF(_Threads_ptwin32)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG
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THREADS_PTHREADS_WIN32_LIBRARY THREADS_PTHREADS_INCLUDE_DIR)
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ELSE()
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG Threads_FOUND)
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ENDIF()
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