1 # - Find the Pthreads library
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2 # This module searches for the Pthreads library (including the
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3 # pthreads-win32 port).
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5 # This module defines these variables:
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8 # True if the Pthreads library was found
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10 # The location of the Pthreads library
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11 # PTHREADS_INCLUDE_DIR
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12 # The include path of the Pthreads library
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13 # PTHREADS_DEFINITIONS
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14 # Preprocessor definitions to define
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16 # This module responds to the PTHREADS_EXCEPTION_SCHEME
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17 # variable on Win32 to allow the user to control the
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18 # library linked against. The Pthreads-win32 port
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19 # provides the ability to link against a version of the
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20 # library with exception handling. IT IS NOT RECOMMENDED
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21 # THAT YOU USE THIS because most POSIX thread implementations
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22 # do not support stack unwinding.
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24 # PTHREADS_EXCEPTION_SCHEME
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25 # C = no exceptions (default)
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26 # (NOTE: This is the default scheme on most POSIX thread
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27 # implementations and what you should probably be using)
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28 # CE = C++ Exception Handling
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29 # SE = Structure Exception Handling (MSVC only)
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33 # Define a default exception scheme to link against
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34 # and validate user choice.
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36 IF(PTHREADS_INCLUDE_DIR)
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37 # Already in cache, be silent
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38 SET(PTHREADS_FIND_QUIETLY TRUE)
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39 ENDIF(PTHREADS_INCLUDE_DIR)
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42 IF(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
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43 # Assign default if needed
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44 SET(PTHREADS_EXCEPTION_SCHEME "C")
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45 ELSE(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
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47 IF(NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "C" AND
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48 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "CE" AND
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49 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
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51 MESSAGE(FATAL_ERROR "See documentation for FindPthreads.cmake, only C, CE, and SE modes are allowed")
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53 ENDIF(NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "C" AND
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54 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "CE" AND
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55 NOT PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
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57 IF(NOT MSVC AND PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
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58 MESSAGE(FATAL_ERROR "Structured Exception Handling is only allowed for MSVC")
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59 ENDIF(NOT MSVC AND PTHREADS_EXCEPTION_SCHEME STREQUAL "SE")
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61 ENDIF(NOT DEFINED PTHREADS_EXCEPTION_SCHEME)
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64 # Find the header file
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66 FIND_PATH(PTHREADS_INCLUDE_DIR pthread.h)
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74 pthreadV${PTHREADS_EXCEPTION_SCHEME}2
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79 pthreadG${PTHREADS_EXCEPTION_SCHEME}2
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82 ELSE(MSVC) # Unix / Cygwin / Apple
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86 FIND_LIBRARY(PTHREADS_LIBRARY ${names}
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87 DOC "The Portable Threads Library")
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89 IF(PTHREADS_INCLUDE_DIR AND PTHREADS_LIBRARY)
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90 SET(PTHREADS_FOUND true)
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91 SET(PTHREADS_DEFINITIONS -DHAVE_PTHREAD_H)
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92 SET(PTHREADS_INCLUDE_DIRS ${PTHREADS_INCLUDE_DIR})
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93 SET(PTHREADS_LIBRARIES ${PTHREADS_LIBRARY})
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94 ENDIF(PTHREADS_INCLUDE_DIR AND PTHREADS_LIBRARY)
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97 IF(NOT PTHREADS_FIND_QUIETLY)
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98 MESSAGE(STATUS "Found Pthreads: ${PTHREADS_LIBRARY}")
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99 ENDIF(NOT PTHREADS_FIND_QUIETLY)
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100 ELSE(PTHREADS_FOUND)
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101 IF(PTHREADS_FIND_REQUIRED)
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102 MESSAGE(FATAL_ERROR "Could not find the Pthreads Library")
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103 ENDIF(PTHREADS_FIND_REQUIRED)
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104 ENDIF(PTHREADS_FOUND)
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