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# This module determines the thread library of the system.
# The following variables are set
# CMAKE_THREAD_LIBS_INIT - the thread library to link into an application (-lpthread )
# CMAKE_USE_SPROC_INIT - are we using sproc?
# CMAKE_USE_WIN32_THREADS_INIT - are we using WIN32 threads
# CMAKE_USE_PTHREADS_INIT - are we using pthreads
# CMAKE_HP_PTHREADS_INIT - are we using hp pthreads
INCLUDE (${CMAKE_ROOT}/Modules/CheckIncludeFile.cmake)
INCLUDE (${CMAKE_ROOT}/Modules/CheckLibraryExists.cmake)
# Do we have sproc?
IF(CMAKE_SYSTEM MATCHES IRIX)
CHECK_INCLUDE_FILE("sys/prctl.h" CMAKE_HAVE_SPROC_H)
ENDIF(CMAKE_SYSTEM MATCHES IRIX)
IF(CMAKE_HAVE_SPROC_H)
# We have sproc
SET(CMAKE_USE_SPROC_INIT 1)
ELSE(CMAKE_HAVE_SPROC_H)
# Do we have pthreads?
CHECK_INCLUDE_FILE("pthread.h" CMAKE_HAVE_PTHREAD_H)
IF(CMAKE_HAVE_PTHREAD_H)
# We have pthread.h
# Let's check for the library now.
SET(CMAKE_HAVE_THREADS_LIBRARY)
IF(NOT THREADS_HAVE_PTHREAD_ARG)
# Do we have -lpthreads
CHECK_LIBRARY_EXISTS(pthreads pthread_create "" CMAKE_HAVE_PTHREADS_CREATE)
IF(CMAKE_HAVE_PTHREADS_CREATE)
SET(CMAKE_THREAD_LIBS_INIT "-lpthreads")
SET(CMAKE_HAVE_THREADS_LIBRARY 1)
ENDIF(CMAKE_HAVE_PTHREADS_CREATE)
# Ok, how about -lpthread
CHECK_LIBRARY_EXISTS(pthread pthread_create "" CMAKE_HAVE_PTHREAD_CREATE)
IF(CMAKE_HAVE_PTHREAD_CREATE)
SET(CMAKE_THREAD_LIBS_INIT "-lpthread")
SET(CMAKE_HAVE_THREADS_LIBRARY 1)
ENDIF(CMAKE_HAVE_PTHREAD_CREATE)
IF(CMAKE_SYSTEM MATCHES "SunOS.*")
# On sun also check for -lthread
CHECK_LIBRARY_EXISTS(thread thr_create "" CMAKE_HAVE_THR_CREATE)
IF(CMAKE_HAVE_THR_CREATE)
SET(CMAKE_THREAD_LIBS_INIT "-lthread")
SET(CMAKE_HAVE_THREADS_LIBRARY 1)
ENDIF(CMAKE_HAVE_THR_CREATE)
ENDIF(CMAKE_SYSTEM MATCHES "SunOS.*")
ENDIF(NOT THREADS_HAVE_PTHREAD_ARG)
IF(NOT CMAKE_HAVE_THREADS_LIBRARY)
# If we did not found -lpthread, -lpthread, or -lthread, look for -pthread
IF("THREADS_HAVE_PTHREAD_ARG" MATCHES "^THREADS_HAVE_PTHREAD_ARG")
MESSAGE(STATUS "Check if compiler accepts -pthread")
TRY_RUN(THREADS_PTHREAD_ARG THREADS_HAVE_PTHREAD_ARG
${CMAKE_BINARY_DIR}
${CMAKE_ROOT}/Modules/CheckForPthreads.c
CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
OUTPUT_VARIABLE OUTPUT)
IF(THREADS_HAVE_PTHREAD_ARG)
IF(THREADS_PTHREAD_ARG MATCHES "^2$")
MESSAGE(STATUS "Check if compiler accepts -pthread - yes")
ELSE(THREADS_PTHREAD_ARG MATCHES "^2$")
MESSAGE(STATUS "Check if compiler accepts -pthread - no")
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
"Determining if compiler accepts -pthread returned ${THREADS_PTHREAD_ARG} instead of 2. The compiler had the following output:\n${OUTPUT}\n\n")
ENDIF(THREADS_PTHREAD_ARG MATCHES "^2$")
ELSE(THREADS_HAVE_PTHREAD_ARG)
MESSAGE(STATUS "Check if compiler accepts -pthread - no")
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
"Determining if compiler accepts -pthread failed with the following output:\n${OUTPUT}\n\n")
ENDIF(THREADS_HAVE_PTHREAD_ARG)
ENDIF("THREADS_HAVE_PTHREAD_ARG" MATCHES "^THREADS_HAVE_PTHREAD_ARG")
IF(THREADS_HAVE_PTHREAD_ARG)
SET(CMAKE_THREAD_LIBS_INIT "-pthread")
ELSE(THREADS_HAVE_PTHREAD_ARG)
ENDIF(THREADS_HAVE_PTHREAD_ARG)
ENDIF(NOT CMAKE_HAVE_THREADS_LIBRARY)
ENDIF(CMAKE_HAVE_PTHREAD_H)
ENDIF(CMAKE_HAVE_SPROC_H)
IF(CMAKE_THREAD_LIBS_INIT)
SET(CMAKE_USE_PTHREADS_INIT 1)
ENDIF(CMAKE_THREAD_LIBS_INIT)
IF(CMAKE_SYSTEM MATCHES "Windows")
SET(CMAKE_USE_WIN32_THREADS_INIT 1)
ENDIF(CMAKE_SYSTEM MATCHES "Windows")
IF(CMAKE_USE_PTHREADS_INIT)
IF(CMAKE_SYSTEM MATCHES "HP-UX-*")
SET(CMAKE_THREAD_LIBS_INIT "-lcma")
SET(CMAKE_USE_PTHREADS_INIT 1)
SET(CMAKE_HP_PTHREADS_INIT 1)
ENDIF(CMAKE_SYSTEM MATCHES "HP-UX-*")
IF(CMAKE_SYSTEM MATCHES "OSF1-V*")
SET(CMAKE_USE_PTHREADS_INIT 0)
SET(CMAKE_THREAD_LIBS_INIT )
ENDIF(CMAKE_SYSTEM MATCHES "OSF1-V*")
IF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
SET(CMAKE_USE_PTHREADS_INIT 1)
SET(CMAKE_THREAD_LIBS_INIT )
SET(CMAKE_USE_WIN32_THREADS_INIT 0)
ENDIF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
ENDIF(CMAKE_USE_PTHREADS_INIT)
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