diff options
Diffstat (limited to 'Modules/FindThreads.cmake')
| -rw-r--r-- | Modules/FindThreads.cmake | 52 |
1 files changed, 33 insertions, 19 deletions
diff --git a/Modules/FindThreads.cmake b/Modules/FindThreads.cmake index b0c91b2..f97e5c8 100644 --- a/Modules/FindThreads.cmake +++ b/Modules/FindThreads.cmake @@ -7,31 +7,44 @@ FindThreads This module determines the thread library of the system. -The following variables are set +Imported Targets +^^^^^^^^^^^^^^^^ -:: +This module defines the following :prop_tgt:`IMPORTED` target: - CMAKE_THREAD_LIBS_INIT - the thread library - CMAKE_USE_WIN32_THREADS_INIT - using WIN32 threads? - CMAKE_USE_PTHREADS_INIT - are we using pthreads - CMAKE_HP_PTHREADS_INIT - are we using hp pthreads +``Threads::Threads`` + The thread library, if found. -The following import target is created +Result Variables +^^^^^^^^^^^^^^^^ -:: +The following variables are set: - Threads::Threads +``Threads_FOUND`` + If a supported thread library was found. +``CMAKE_THREAD_LIBS_INIT`` + The thread library to use. This may be empty if the thread functions + are provided by the system libraries and no special flags are needed + to use them. +``CMAKE_USE_WIN32_THREADS_INIT`` + If the found thread library is the win32 one. +``CMAKE_USE_PTHREADS_INIT`` + If the found thread library is pthread compatible. +``CMAKE_HP_PTHREADS_INIT`` + If the found thread library is the HP thread library. -If the use of the -pthread compiler and linker flag is preferred then the -caller can set +Variables Affecting Behavior +^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -:: +.. variable:: THREADS_PREFER_PTHREAD_FLAG - THREADS_PREFER_PTHREAD_FLAG + If the use of the -pthread compiler and linker flag is preferred then + the caller can set this variable to TRUE. The compiler flag can only be + used with the imported target. Use of both the imported target as well + as this switch is highly recommended for new code. -The compiler flag can only be used with the imported -target. Use of both the imported target as well as this switch is highly -recommended for new code. + This variable has no effect if the system libraries provide the + thread functions, i.e. when ``CMAKE_THREAD_LIBS_INIT`` will be empty. #]=======================================================================] include (CheckLibraryExists) @@ -63,6 +76,7 @@ int main(void) pthread_t thread; pthread_create(&thread, NULL, test_func, NULL); pthread_detach(thread); + pthread_cancel(thread); pthread_join(thread, NULL); pthread_atfork(NULL, NULL, NULL); pthread_exit(NULL); @@ -90,7 +104,7 @@ macro(_check_pthreads_flag) if(NOT Threads_FOUND) # If we did not found -lpthread, -lpthread, or -lthread, look for -pthread if(NOT DEFINED THREADS_HAVE_PTHREAD_ARG) - message(STATUS "Check if compiler accepts -pthread") + message(CHECK_START "Check if compiler accepts -pthread") if(CMAKE_C_COMPILER_LOADED) set(_threads_src ${CMAKE_CURRENT_LIST_DIR}/CheckForPthreads.c) elseif(CMAKE_CXX_COMPILER_LOADED) @@ -106,9 +120,9 @@ macro(_check_pthreads_flag) if(THREADS_HAVE_PTHREAD_ARG) set(Threads_FOUND TRUE) - message(STATUS "Check if compiler accepts -pthread - yes") + message(CHECK_PASS "yes") else() - message(STATUS "Check if compiler accepts -pthread - no") + message(CHECK_FAIL "no") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Determining if compiler accepts -pthread failed with the following output:\n${OUTPUT}\n\n") |