-### Initialize of CONTEXT THREADS
-
-set(HAVE_THREAD_CONTEXTS 0)
-if(CMAKE_USE_PTHREADS_INIT)
- ### Test that we have a way to create semaphores
-
- if(HAVE_SEM_OPEN_LIB)
- try_run(semopen_retval semopen_compilable
- ${CMAKE_BINARY_DIR}
- ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_sem_open.c
- LINK_LIBRARIES pthread
- COMPILE_OUTPUT_VARIABLE semopen_compilmsg
- RUN_OUTPUT_VARIABLE semopen_runmsg)
-
- set(HAVE_SEM_OPEN 0)
- if(semopen_compilable)
- if(NOT semopen_retval) #Â error if not 0
- message(STATUS "sem_open is compilable and executable")
- set(HAVE_SEM_OPEN 1)
- else()
- message(STATUS "Warning: sem_open seems compilable but not executable")
- message(STATUS "Compilation output: ${semopen_compilmsg}")
- message(STATUS "Execution output: ${semopen_runmsg}")
- message(STATUS "Exit value: ${semopen_retval}")
- endif()
- else()
- message(STATUS "Warning: sem_open not compilable")
- message(STATUS "Compilation output: ${semopen_compilmsg}")
- endif()
- unset(semopen_compilable)
- unset(semopen_retval)
- unset(semopen_runmsg)
- unset(semopen_compilmsg)
- endif()
-
- if(HAVE_SEM_INIT_LIB)
- execute_process(COMMAND ${CMAKE_C_COMPILER} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_sem_init.c -lpthread -o sem_init
- WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
- RESULT_VARIABLE HAVE_SEM_INIT_run
- OUTPUT_VARIABLE HAVE_SEM_INIT_compil)
-
- # Test sem_init by compiling:
- if(HAVE_SEM_INIT_compil)
- set(HAVE_SEM_INIT 0)
- message(STATUS "Warning: sem_init not compilable")
- message(STATUS "HAVE_SEM_INIT_comp_output: ${HAVE_SEM_OPEN_comp_output}")
- else()
- set(HAVE_SEM_INIT 1)
- message(STATUS "sem_init is compilable")
- endif()
-
- # If we're not crosscompiling, we check by executing the program:
- if (HAVE_SEM_INIT AND NOT CMAKE_CROSSCOMPILING)
- execute_process(COMMAND ./sem_init
- WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
- RESULT_VARIABLE HAVE_SEM_INIT_run
- OUTPUT_VARIABLE var_compil
- )
- if (NOT HAVE_SEM_INIT_run)
- set(HAVE_SEM_INIT 1)
- message(STATUS "sem_init is executable")
- else()
- set(HAVE_SEM_INIT 0)
- if(EXISTS "${CMAKE_BINARY_DIR}/sem_init")
- message(STATUS "Bin ${CMAKE_BINARY_DIR}/sem_init exists!")
- else()
- message(STATUS "Bin ${CMAKE_BINARY_DIR}/sem_init not exists!")
- endif()
- message(STATUS "Warning: sem_init not executable")
- message(STATUS "Compilation output: '${var_compil}'")
- message(STATUS "Exit result of sem_init: ${HAVE_SEM_INIT_run}")
- endif()
- endif()
- file(REMOVE sem_init)
- else()
- set(HAVE_SEM_INIT 0)
- endif()
-
- if(NOT HAVE_SEM_OPEN AND NOT HAVE_SEM_INIT)
- message(FATAL_ERROR "Semaphores are not usable (neither sem_open nor sem_init is both compilable and executable), but they are mandatory to threads (you may need to mount /dev).")
- endif()
-
- set(HAVE_THREAD_CONTEXTS 1)
- message(STATUS "Support for thread context factory ok.")
-endif()