add find threads check

Modules/CMakeBackwardCompatibilityC.cmake

@@ -26,3 +26,27 @@ CHECK_INCLUDE_FILE("pthread.h"      CMAKE_HAVE_PTHREAD_H)
 INCLUDE (${CMAKE_ROOT}/Modules/TestBigEndian.cmake)
 TEST_BIG_ENDIAN(CMAKE_WORDS_BIGENDIAN)
 INCLUDE (${CMAKE_ROOT}/Modules/FindX11.cmake)
+INCLUDE (${CMAKE_ROOT}/Modules/FindThreads.cmake)
+
+SET (CMAKE_THREAD_LIBS        "${CMAKE_THREAD_LIBS}" CACHE STRING 
+    "Thread library used.")
+
+SET (CMAKE_USE_PTHREADS       "${CMAKE_USE_PTHREADS}" CACHE BOOL
+     "Use the pthreads library.")
+
+SET (CMAKE_USE_WIN32_THREADS  "${CMAKE_USE_WIN32_THREADS}" CACHE BOOL
+       "Use the win32 thread library.")
+
+SET (CMAKE_HP_PTHREADS        ${CMAKE_HP_PTHREADS} CACHE BOOL
+     "Use HP pthreads.")
+
+SET (CMAKE_USE_SPROC          ${CMAKE_USE_SPROC} CACHE BOOL 
+     "Use sproc libs.")
+
+MARK_AS_ADVANCED(
+CMAKE_THREAD_LIBS
+CMAKE_USE_PTHREADS
+CMAKE_USE_WIN32_THREADS
+CMAKE_USE_SPROC
+CMAKE_HP_PTHREADS)
+

Modules/CheckLibraryExists.cmake

@@ -8,7 +8,7 @@
 
 MACRO(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE)
   SET(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION -DCHECK_FUNCTION_EXISTS=${FUNCTION})
-
+MESSAGE("Lib: ${LIBRARY} FUN: ${FUNCTION} LOC: ${LOCATION} VAR: ${VARIABLE} ")
   TRY_COMPILE(${VARIABLE}
              ${PROJECT_BINARY_DIR}
              ${CMAKE_ROOT}/Modules/CheckFunctionExists.c

Modules/FindThreads.cmake

@@ -0,0 +1,68 @@
+# This module determines the thread library of the system.
+# The following variables are set
+# CMAKE_THREAD_LIBS        - the thread library to link into an application (-lpthread )
+# CMAKE_USE_SPROC          - are we using sproc?
+# CMAKE_USE_WIN32_THREADS  - are we using WIN32 threads
+# CMAKE_USE_PTHREADS       - are we using pthreads
+#
+
+INCLUDE (${CMAKE_ROOT}/Modules/CheckIncludeFile.cmake)
+INCLUDE (${CMAKE_ROOT}/Modules/CheckLibraryExists.cmake)
+
+IF(CMAKE_SYSTEM MATCHES IRIX)
+  CHECK_INCLUDE_FILE("sys/prctl.h"  CMAKE_HAVE_SPROC_H)
+ENDIF(CMAKE_SYSTEM MATCHES IRIX)
+
+CHECK_INCLUDE_FILE("pthread.h" CMAKE_HAVE_PTHREAD_H)
+IF(CMAKE_HAVE_PTHREAD_H)
+  IF(NOT CMAKE_HAVE_SPROC_H)
+    CHECK_LIBRARY_EXISTS(pthreads pthread_create "" CMAKE_HAVE_PTHREADS_CREATE)
+    IF(CMAKE_HAVE_PTHREADS_CREATE)
+      SET(CMAKE_THREAD_LIBS "-lpthreads")
+    ENDIF(CMAKE_HAVE_PTHREADS_CREATE)
+    CHECK_LIBRARY_EXISTS(pthread pthread_create "" CMAKE_HAVE_PTHREAD_CREATE)
+    IF(CMAKE_HAVE_PTHREAD_CREATE)
+      SET(CMAKE_THREAD_LIBS "-lpthread")
+    ENDIF(CMAKE_HAVE_PTHREAD_CREATE)
+    IF(CMAKE_SYSTEM MATCHES "SunOS.*")
+      CHECK_LIBRARY_EXISTS(thread thr_create "" CMAKE_HAVE_THR_CREATE)
+      IF(CMAKE_HAVE_THR_CREATE)
+        SET(CMAKE_THREAD_LIBS "-lthread")
+      ENDIF(CMAKE_HAVE_THR_CREATE)
+    ENDIF(CMAKE_SYSTEM MATCHES "SunOS.*")
+  ENDIF(NOT CMAKE_HAVE_SPROC_H)
+ENDIF(CMAKE_HAVE_PTHREAD_H)
+
+IF(CMAKE_HAVE_SPROC_H)
+  SET(CMAKE_USE_SPROC 1)
+ENDIF(CMAKE_HAVE_SPROC_H)
+IF(CMAKE_THREAD_LIBS)
+  SET(CMAKE_USE_PTHREADS 1)
+ENDIF(CMAKE_THREAD_LIBS)
+
+IF(CMAKE_SYSTEM MATCHES "Windows")
+  SET(CMAKE_USE_WIN32_THREADS 1)
+ENDIF(CMAKE_SYSTEM MATCHES "Windows")
+
+IF(CMAKE_SYSTEM MATCHES "HP-UX-*")
+  SET(CMAKE_THREAD_LIBS "-lcma")
+  SET(CMAKE_USE_PTHREADS 1)
+  SET(CMAKE_HP_PTHREADS 1)
+ENDIF(CMAKE_SYSTEM MATCHES "HP-UX-*")
+
+IF(CMAKE_SYSTEM MATCHES "OSF1-V*")
+  SET(CMAKE_USE_PTHREADS 0)
+  SET(CMAKE_THREAD_LIBS )
+ENDIF(CMAKE_SYSTEM MATCHES "OSF1-V*")
+
+IF(CMAKE_SYSTEM MATCHES "FreeBSD*")
+  SET(CMAKE_USE_PTHREADS 0)
+  SET(CMAKE_THREAD_LIBS )
+ENDIF(CMAKE_SYSTEM MATCHES "FreeBSD*")
+
+IF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
+  SET(CMAKE_USE_PTHREADS 1)
+  SET(CMAKE_THREAD_LIBS )
+  SET(CMAKE_USE_WIN32_THREADS 0)
+ENDIF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
+