diff options
Diffstat (limited to 'share/cmake-3.17/Modules/FindThreads.cmake')
| -rw-r--r-- | share/cmake-3.17/Modules/FindThreads.cmake | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/share/cmake-3.17/Modules/FindThreads.cmake b/share/cmake-3.17/Modules/FindThreads.cmake deleted file mode 100644 index f97e5c8..0000000 --- a/share/cmake-3.17/Modules/FindThreads.cmake +++ /dev/null @@ -1,248 +0,0 @@ -# Distributed under the OSI-approved BSD 3-Clause License. See accompanying -# file Copyright.txt or https://cmake.org/licensing for details. - -#[=======================================================================[.rst: -FindThreads ------------ - -This module determines the thread library of the system. - -Imported Targets -^^^^^^^^^^^^^^^^ - -This module defines the following :prop_tgt:`IMPORTED` target: - -``Threads::Threads`` - The thread library, if found. - -Result Variables -^^^^^^^^^^^^^^^^ - -The following variables are set: - -``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. - -Variables Affecting Behavior -^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -.. variable:: 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. - - 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) -set(Threads_FOUND FALSE) -set(CMAKE_REQUIRED_QUIET_SAVE ${CMAKE_REQUIRED_QUIET}) -set(CMAKE_REQUIRED_QUIET ${Threads_FIND_QUIETLY}) - -if(CMAKE_C_COMPILER_LOADED) - include (CheckIncludeFile) - include (CheckCSourceCompiles) -elseif(CMAKE_CXX_COMPILER_LOADED) - include (CheckIncludeFileCXX) - include (CheckCXXSourceCompiles) -else() - message(FATAL_ERROR "FindThreads only works if either C or CXX language is enabled") -endif() - -# simple pthread test code -set(PTHREAD_C_CXX_TEST_SOURCE [====[ -#include <pthread.h> - -void* test_func(void* data) -{ - return data; -} - -int main(void) -{ - pthread_t thread; - pthread_create(&thread, NULL, test_func, NULL); - pthread_detach(thread); - pthread_cancel(thread); - pthread_join(thread, NULL); - pthread_atfork(NULL, NULL, NULL); - pthread_exit(NULL); - - return 0; -} -]====]) - -# Internal helper macro. -# Do NOT even think about using it outside of this file! -macro(_check_threads_lib LIBNAME FUNCNAME VARNAME) - if(NOT Threads_FOUND) - CHECK_LIBRARY_EXISTS(${LIBNAME} ${FUNCNAME} "" ${VARNAME}) - if(${VARNAME}) - set(CMAKE_THREAD_LIBS_INIT "-l${LIBNAME}") - set(CMAKE_HAVE_THREADS_LIBRARY 1) - set(Threads_FOUND TRUE) - endif() - endif () -endmacro() - -# Internal helper macro. -# Do NOT even think about using it outside of this file! -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(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) - set(_threads_src ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindThreads/CheckForPthreads.cxx) - configure_file(${CMAKE_CURRENT_LIST_DIR}/CheckForPthreads.c "${_threads_src}" COPYONLY) - endif() - try_compile(THREADS_HAVE_PTHREAD_ARG - ${CMAKE_BINARY_DIR} - ${_threads_src} - CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread - OUTPUT_VARIABLE OUTPUT) - unset(_threads_src) - - if(THREADS_HAVE_PTHREAD_ARG) - set(Threads_FOUND TRUE) - message(CHECK_PASS "yes") - else() - 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${OUTPUT}\n\n") - endif() - - endif() - - if(THREADS_HAVE_PTHREAD_ARG) - set(Threads_FOUND TRUE) - set(CMAKE_THREAD_LIBS_INIT "-pthread") - endif() - endif() -endmacro() - -# Do we have pthreads? -if(CMAKE_C_COMPILER_LOADED) - CHECK_INCLUDE_FILE("pthread.h" CMAKE_HAVE_PTHREAD_H) -else() - CHECK_INCLUDE_FILE_CXX("pthread.h" CMAKE_HAVE_PTHREAD_H) -endif() - -if(CMAKE_HAVE_PTHREAD_H) - # - # We have pthread.h - # Let's check for the library now. - # - set(CMAKE_HAVE_THREADS_LIBRARY) - if(NOT THREADS_HAVE_PTHREAD_ARG) - # Check if pthread functions are in normal C library. - # We list some pthread functions in PTHREAD_C_CXX_TEST_SOURCE test code. - # If the pthread functions already exist in C library, we could just use - # them instead of linking to the additional pthread library. - if(CMAKE_C_COMPILER_LOADED) - CHECK_C_SOURCE_COMPILES("${PTHREAD_C_CXX_TEST_SOURCE}" CMAKE_HAVE_LIBC_PTHREAD) - elseif(CMAKE_CXX_COMPILER_LOADED) - CHECK_CXX_SOURCE_COMPILES("${PTHREAD_C_CXX_TEST_SOURCE}" CMAKE_HAVE_LIBC_PTHREAD) - endif() - if(CMAKE_HAVE_LIBC_PTHREAD) - set(CMAKE_THREAD_LIBS_INIT "") - set(CMAKE_HAVE_THREADS_LIBRARY 1) - set(Threads_FOUND TRUE) - else() - # Check for -pthread first if enabled. This is the recommended - # way, but not backwards compatible as one must also pass -pthread - # as compiler flag then. - if (THREADS_PREFER_PTHREAD_FLAG) - _check_pthreads_flag() - endif () - - if(CMAKE_SYSTEM MATCHES "GHS-MULTI") - _check_threads_lib(posix pthread_create CMAKE_HAVE_PTHREADS_CREATE) - endif() - _check_threads_lib(pthreads pthread_create CMAKE_HAVE_PTHREADS_CREATE) - _check_threads_lib(pthread pthread_create CMAKE_HAVE_PTHREAD_CREATE) - if(CMAKE_SYSTEM_NAME MATCHES "SunOS") - # On sun also check for -lthread - _check_threads_lib(thread thr_create CMAKE_HAVE_THR_CREATE) - endif() - endif() - endif() - - _check_pthreads_flag() -endif() - -if(CMAKE_THREAD_LIBS_INIT OR CMAKE_HAVE_LIBC_PTHREAD) - set(CMAKE_USE_PTHREADS_INIT 1) - set(Threads_FOUND TRUE) -endif() - -if(CMAKE_SYSTEM_NAME MATCHES "Windows") - set(CMAKE_USE_WIN32_THREADS_INIT 1) - set(Threads_FOUND TRUE) -endif() - -if(CMAKE_USE_PTHREADS_INIT) - if(CMAKE_SYSTEM_NAME MATCHES "HP-UX") - # Use libcma if it exists and can be used. It provides more - # symbols than the plain pthread library. CMA threads - # have actually been deprecated: - # http://docs.hp.com/en/B3920-90091/ch12s03.html#d0e11395 - # http://docs.hp.com/en/947/d8.html - # but we need to maintain compatibility here. - # The CMAKE_HP_PTHREADS setting actually indicates whether CMA threads - # are available. - CHECK_LIBRARY_EXISTS(cma pthread_attr_create "" CMAKE_HAVE_HP_CMA) - if(CMAKE_HAVE_HP_CMA) - set(CMAKE_THREAD_LIBS_INIT "-lcma") - set(CMAKE_HP_PTHREADS_INIT 1) - set(Threads_FOUND TRUE) - endif() - set(CMAKE_USE_PTHREADS_INIT 1) - endif() - - if(CMAKE_SYSTEM MATCHES "OSF1-V") - set(CMAKE_USE_PTHREADS_INIT 0) - set(CMAKE_THREAD_LIBS_INIT ) - endif() - - if(CMAKE_SYSTEM MATCHES "CYGWIN_NT") - set(CMAKE_USE_PTHREADS_INIT 1) - set(Threads_FOUND TRUE) - set(CMAKE_THREAD_LIBS_INIT ) - set(CMAKE_USE_WIN32_THREADS_INIT 0) - endif() -endif() - -set(CMAKE_REQUIRED_QUIET ${CMAKE_REQUIRED_QUIET_SAVE}) -include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) -FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG Threads_FOUND) - -if(THREADS_FOUND AND NOT TARGET Threads::Threads) - add_library(Threads::Threads INTERFACE IMPORTED) - - if(THREADS_HAVE_PTHREAD_ARG) - set_property(TARGET Threads::Threads - PROPERTY INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -pthread>" - "$<$<NOT:$<COMPILE_LANGUAGE:CUDA>>:-pthread>") - endif() - - if(CMAKE_THREAD_LIBS_INIT) - set_property(TARGET Threads::Threads PROPERTY INTERFACE_LINK_LIBRARIES "${CMAKE_THREAD_LIBS_INIT}") - endif() -endif() |