add win32 compatibility

Signed-off-by: Steve Markgraf <steve@steve-m.de>

1 files changed, 246 insertions, 0 deletions

diff --git a/cmake/Modules/FindThreads.cmake b/cmake/Modules/FindThreads.cmake
new file mode 100644
index 0000000..8028b15
--- /dev/null
+++ b/cmake/Modules/FindThreads.cmake
@@ -0,0 +1,246 @@
+# Updated FindThreads.cmake that supports pthread-win32
+# Downloaded from http://www.vtk.org/Bug/bug_view_advanced_page.php?bug_id=6399
+
+# - This module determines the thread library of the system.
+#
+# The following variables are set
+#  CMAKE_THREAD_LIBS_INIT     - the thread library
+#  CMAKE_USE_SPROC_INIT       - are we using sproc?
+#  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
+#
+# If use of pthreads-win32 is desired, the following variables
+# can be set.
+#
+#  THREADS_USE_PTHREADS_WIN32 -
+#    Setting this to true searches for the pthreads-win32
+#    port (since CMake 2.8.0)
+#
+#  THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME
+#      C  = no exceptions (default)
+#         (NOTE: This is the default scheme on most POSIX thread
+#          implementations and what you should probably be using)
+#      CE = C++ Exception Handling
+#      SE = Structure Exception Handling (MSVC only)
+#      (NOTE: Changing this option from the default may affect
+#       the portability of your application.  See pthreads-win32
+#       documentation for more details.)
+#
+#======================================================
+# Example usage where threading library
+# is provided by the system:
+#
+#   find_package(Threads REQUIRED)
+#   add_executable(foo foo.cc)
+#   target_link_libraries(foo ${CMAKE_THREAD_LIBS_INIT})
+#
+# Example usage if pthreads-win32 is desired on Windows
+# or a system provided thread library:
+#
+#   set(THREADS_USE_PTHREADS_WIN32 true)
+#   find_package(Threads REQUIRED)
+#   include_directories(${THREADS_PTHREADS_INCLUDE_DIR})
+#
+#   add_executable(foo foo.cc)
+#   target_link_libraries(foo ${CMAKE_THREAD_LIBS_INIT})
+#
+
+INCLUDE (CheckIncludeFiles)
+INCLUDE (CheckLibraryExists)
+SET(Threads_FOUND FALSE)
+
+IF(WIN32 AND NOT CYGWIN AND THREADS_USE_PTHREADS_WIN32)
+  SET(_Threads_ptwin32 true)
+ENDIF()
+
+# Do we have sproc?
+IF(CMAKE_SYSTEM MATCHES IRIX)
+  CHECK_INCLUDE_FILES("sys/types.h;sys/prctl.h"  CMAKE_HAVE_SPROC_H)
+ENDIF()
+
+IF(CMAKE_HAVE_SPROC_H)
+  # We have sproc
+  SET(CMAKE_USE_SPROC_INIT 1)
+
+ELSEIF(_Threads_ptwin32)
+
+  IF(NOT DEFINED THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME)
+    # Assign the default scheme
+    SET(THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME "C")
+  ELSE()
+    # Validate the scheme specified by the user
+    IF(NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "C" AND
+       NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "CE" AND
+       NOT THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
+         MESSAGE(FATAL_ERROR "See documentation for FindPthreads.cmake, only C, CE, and SE modes are allowed")
+    ENDIF()
+    IF(NOT MSVC AND THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
+      MESSAGE(FATAL_ERROR "Structured Exception Handling is only allowed for MSVC")
+    ENDIF(NOT MSVC AND THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME STREQUAL "SE")
+  ENDIF()
+
+  FIND_PATH(THREADS_PTHREADS_INCLUDE_DIR pthread.h)
+
+  # Determine the library filename
+  IF(MSVC)
+    SET(_Threads_pthreads_libname
+        pthreadV${THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME}2)
+  ELSEIF(MINGW)
+    SET(_Threads_pthreads_libname
+        pthreadG${THREADS_PTHREADS_WIN32_EXCEPTION_SCHEME}2)
+  ELSE()
+    MESSAGE(FATAL_ERROR "This should never happen")
+  ENDIF()
+
+  # Use the include path to help find the library if possible
+  SET(_Threads_lib_paths "")
+  IF(THREADS_PTHREADS_INCLUDE_DIR)
+     GET_FILENAME_COMPONENT(_Threads_root_dir
+                            ${THREADS_PTHREADS_INCLUDE_DIR} PATH)
+     SET(_Threads_lib_paths ${_Threads_root_dir}/lib)
+  ENDIF()
+  FIND_LIBRARY(THREADS_PTHREADS_WIN32_LIBRARY
+               NAMES ${_Threads_pthreads_libname}
+               PATHS ${_Threads_lib_paths}
+               DOC "The Portable Threads Library for Win32"
+               NO_SYSTEM_PATH
+               )
+
+  IF(THREADS_PTHREADS_INCLUDE_DIR AND THREADS_PTHREADS_WIN32_LIBRARY)
+    MARK_AS_ADVANCED(THREADS_PTHREADS_INCLUDE_DIR)
+    SET(CMAKE_THREAD_LIBS_INIT ${THREADS_PTHREADS_WIN32_LIBRARY})
+    SET(CMAKE_HAVE_THREADS_LIBRARY 1)
+    SET(Threads_FOUND TRUE)
+  ENDIF()
+
+  MARK_AS_ADVANCED(THREADS_PTHREADS_WIN32_LIBRARY)
+
+ELSE()
+  # Do we have pthreads?
+  CHECK_INCLUDE_FILES("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)
+        SET(Threads_FOUND TRUE)
+      ENDIF()
+
+      # 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(Threads_FOUND TRUE)
+        SET(CMAKE_HAVE_THREADS_LIBRARY 1)
+      ENDIF()
+
+      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)
+          SET(Threads_FOUND TRUE)
+        ENDIF()
+      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}
+          ${CMAKE_ROOT}/Modules/CheckForPthreads.c
+          CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
+          COMPILE_OUTPUT_VARIABLE OUTPUT)
+
+        IF(THREADS_HAVE_PTHREAD_ARG)
+          IF(THREADS_PTHREAD_ARG MATCHES "^2$")
+            SET(Threads_FOUND TRUE)
+            MESSAGE(STATUS "Check if compiler accepts -pthread - yes")
+          ELSE()
+            MESSAGE(STATUS "Check if compiler accepts -pthread - no")
+            FILE(APPEND
+              ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/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()
+        ELSE()
+          MESSAGE(STATUS "Check if compiler accepts -pthread - 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("THREADS_HAVE_PTHREAD_ARG" MATCHES "^THREADS_HAVE_PTHREAD_ARG")
+
+      IF(THREADS_HAVE_PTHREAD_ARG)
+        SET(Threads_FOUND TRUE)
+        SET(CMAKE_THREAD_LIBS_INIT "-pthread")
+      ENDIF()
+
+    ENDIF(NOT CMAKE_HAVE_THREADS_LIBRARY)
+  ENDIF(CMAKE_HAVE_PTHREAD_H)
+ENDIF()
+
+IF(CMAKE_THREAD_LIBS_INIT)
+  SET(CMAKE_USE_PTHREADS_INIT 1)
+  SET(Threads_FOUND TRUE)
+ENDIF()
+
+IF(CMAKE_SYSTEM MATCHES "Windows"
+   AND NOT THREADS_USE_PTHREADS_WIN32)
+  SET(CMAKE_USE_WIN32_THREADS_INIT 1)
+  SET(Threads_FOUND TRUE)
+ENDIF()
+
+IF(CMAKE_USE_PTHREADS_INIT)
+  IF(CMAKE_SYSTEM 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(CMAKE_HAVE_HP_CMA)
+    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(CMAKE_USE_PTHREADS_INIT)
+
+INCLUDE(FindPackageHandleStandardArgs)
+IF(_Threads_ptwin32)
+  FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG
+    THREADS_PTHREADS_WIN32_LIBRARY THREADS_PTHREADS_INCLUDE_DIR)
+ELSE()
+  FIND_PACKAGE_HANDLE_STANDARD_ARGS(Threads DEFAULT_MSG Threads_FOUND)
+ENDIF()