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35 # - Find the Pthreads library
36 # This module searches for the Pthreads library (including the
37 # pthreads-win32 port).
39 # This module defines these variables:
42 # True if the Pthreads library was found
44 # The location of the Pthreads library
45 # PTHREADS_INCLUDE_DIR
46 # The include path of the Pthreads library
47 # PTHREADS_DEFINITIONS
48 # Preprocessor definitions to define
50 # This module responds to the PTHREADS_EXCEPTION_SCHEME
51 # variable on Win32 to allow the user to control the
52 # library linked against. The Pthreads-win32 port
53 # provides the ability to link against a version of the
54 # library with exception handling. IT IS NOT RECOMMENDED
55 # THAT YOU USE THIS because most POSIX thread implementations
56 # do not support stack unwinding.
58 # PTHREADS_EXCEPTION_SCHEME
59 # C = no exceptions (default)
60 # (NOTE: This is the default scheme on most POSIX thread
61 # implementations and what you should probably be using)
62 # CE = C++ Exception Handling
63 # SE = Structure Exception Handling (MSVC only)
67 # Define a default exception scheme to link against
68 # and validate user choice.
70 IF(PTHREADS_INCLUDE_DIR)
71 # Already in cache, be silent
72 SET(PTHREADS_FIND_QUIETLY TRUE)
73 ENDIF(PTHREADS_INCLUDE_DIR)
76 IF(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
77 # Assign default if needed
78 SET(PTHREADS_EXCEPTION_SCHEME "C")
79 ELSE(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
81 IF(NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "C" AND
82 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "CE" AND
83 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
85 MESSAGE(FATAL_ERROR "See documentation for FindPthreads.cmake, only C, CE, and SE modes are allowed")
87 ENDIF(NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "C" AND
88 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "CE" AND
89 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
91 IF(NOT MSVC AND PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
92 MESSAGE(FATAL_ERROR "Structured Exception Handling is only allowed for MSVC")
93 ENDIF(NOT MSVC AND PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
95 ENDIF(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
98 # Find the header file
100 FIND_PATH(PTHREADS_INCLUDE_DIR pthread.h)
108 pthreadV${PTHREADS_EXCEPTION_SCHEME}2
113 pthreadG${PTHREADS_EXCEPTION_SCHEME}2
116 ELSE(MSVC) # Unix / Cygwin / Apple
120 FIND_LIBRARY(PTHREADS_LIBRARY ${names}
121 DOC "The Portable Threads Library")
123 IF(PTHREADS_INCLUDE_DIR AND PTHREADS_LIBRARY)
124 SET(PTHREADS_FOUND true)
125 SET(PTHREADS_DEFINITIONS -DHAVE_PTHREAD_H)
126 SET(PTHREADS_INCLUDE_DIRS ${PTHREADS_INCLUDE_DIR})
127 SET(PTHREADS_LIBRARIES ${PTHREADS_LIBRARY})
128 ENDIF(PTHREADS_INCLUDE_DIR AND PTHREADS_LIBRARY)
131 IF(NOT PTHREADS_FIND_QUIETLY)
132 MESSAGE(STATUS "Found Pthreads: ${PTHREADS_LIBRARY}")
133 ENDIF(NOT PTHREADS_FIND_QUIETLY)
135 IF(PTHREADS_FIND_REQUIRED)
136 MESSAGE(FATAL_ERROR "Could not find the Pthreads Library")
137 ENDIF(PTHREADS_FIND_REQUIRED)
138 ENDIF(PTHREADS_FOUND)