summaryrefslogtreecommitdiff
path: root/Modules/FindBoost.cmake
blob: 17aba1b2219731f599e2d50f1cfb4b980eee9a5c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
# - Try to find Boost include dirs and libraries
# Usage of this module as follows:
#
# NOTE: Take note of the Boost_ADDITIONAL_VERSIONS variable below.
# Due to Boost naming conventions and limitations in CMake this find
# module is NOT future safe with respect to Boost version numbers,
# and may break.
#
# == Using Header-Only libraries from within Boost: ==
#
#   find_package( Boost 1.36.0 )
#   if(Boost_FOUND)
#      include_directories(${Boost_INCLUDE_DIRS})
#      add_executable(foo foo.cc)
#   endif()
#
#
# == Using actual libraries from within Boost: ==
#
#   set(Boost_USE_STATIC_LIBS        ON)
#   set(Boost_USE_MULTITHREADED      ON)
#   set(Boost_USE_STATIC_RUNTIME    OFF)
#   find_package( Boost 1.36.0 COMPONENTS date_time filesystem system ... )
#
#   if(Boost_FOUND)
#      include_directories(${Boost_INCLUDE_DIRS})
#      add_executable(foo foo.cc)
#      target_link_libraries(foo ${Boost_LIBRARIES})
#   endif()
#
#
# The components list needs to contain actual names of boost libraries only,
# such as "date_time" for "libboost_date_time".  If you're using parts of
# Boost that contain header files only (e.g. foreach) you do not need to
# specify COMPONENTS.
#
# You should provide a minimum version number that should be used. If you provide this
# version number and specify the REQUIRED attribute, this module will fail if it
# can't find the specified or a later version. If you specify a version number this is
# automatically put into the considered list of version numbers and thus doesn't need
# to be specified in the Boost_ADDITIONAL_VERSIONS variable (see below).
#
# NOTE for Visual Studio Users:
#     Automatic linking is used on MSVC & Borland compilers by default when
#     #including things in Boost.  It's important to note that setting
#     Boost_USE_STATIC_LIBS to OFF is NOT enough to get you dynamic linking,
#     should you need this feature.  Automatic linking typically uses static
#     libraries with a few exceptions (Boost.Python is one).
#
#     Please see the section below near Boost_LIB_DIAGNOSTIC_DEFINITIONS for
#     more details.  Adding a target_link_libraries() as shown in the example
#     above appears to cause VS to link dynamically if Boost_USE_STATIC_LIBS
#     gets set to OFF.  It is suggested you avoid automatic linking since it
#     will make your application less portable.
#
# =========== The mess that is Boost_ADDITIONAL_VERSIONS (sorry?) ============
#
# OK, so the Boost_ADDITIONAL_VERSIONS variable can be used to specify a list of
# boost version numbers that should be taken into account when searching
# for Boost. Unfortunately boost puts the version number into the
# actual filename for the libraries, so this variable will certainly be needed
# in the future when new Boost versions are released.
#
# Currently this module searches for the following version numbers:
# 1.33, 1.33.0, 1.33.1, 1.34, 1.34.0, 1.34.1, 1.35, 1.35.0, 1.35.1,
# 1.36, 1.36.0, 1.36.1, 1.37, 1.37.0, 1.38, 1.38.0, 1.39, 1.39.0,
# 1.40, 1.40.0, 1.41, 1.41.0, 1.42, 1.42.0, 1.43, 1.43.0, 1.44, 1.44.0,
# 1.45, 1.45.0, 1.46, 1.46.0, 1.46.1, 1.47, 1.47.0, 1.48, 1.48.0,
# 1.49, 1.49.0, 1.50, 1.50.0, 1.51, 1.51.0, 1.52, 1.52.0,
# 1.53, 1.53.0, 1.54, 1.54.0, 1.55, 1.55.0, 1.56, 1.56.0
#
# NOTE: If you add a new major 1.x version in Boost_ADDITIONAL_VERSIONS you should
# add both 1.x and 1.x.0 as shown above.  Official Boost include directories
# omit the 3rd version number from include paths if it is 0 although not all
# binary Boost releases do so.
#
# set(Boost_ADDITIONAL_VERSIONS "1.78" "1.78.0" "1.79" "1.79.0")
#
# ===================================== ============= ========================
#
# Variables used by this module, they can change the default behaviour and
# need to be set before calling find_package:
#
#   Boost_USE_MULTITHREADED      Can be set to OFF to use the non-multithreaded
#                                boost libraries.  If not specified, defaults
#                                to ON.
#
#   Boost_USE_STATIC_LIBS        Can be set to ON to force the use of the static
#                                boost libraries. Defaults to OFF.
#
#   Boost_NO_SYSTEM_PATHS        Set to TRUE to suppress searching in system
#                                paths (or other locations outside of BOOST_ROOT
#                                or BOOST_INCLUDEDIR).  Useful when specifying
#                                BOOST_ROOT. Defaults to OFF.
#                                  [Since CMake 2.8.3]
#
#   Boost_NO_BOOST_CMAKE         Do not do a find_package call in config mode
#                                before searching for a regular boost install.
#                                This will avoid finding boost-cmake installs.
#                                Defaults to OFF.
#                                  [Since CMake 2.8.6]
#
#   Boost_USE_STATIC_RUNTIME     If enabled, searches for boost libraries
#                                linked against a static C++ standard library
#                                ('s' ABI tag). This option should be set to
#                                ON or OFF because the default behavior
#                                if not specified is platform dependent
#                                for backwards compatibility.
#                                  [Since CMake 2.8.3]
#
#   Boost_USE_DEBUG_PYTHON       If enabled, searches for boost libraries
#                                compiled against a special debug build of
#                                Python ('y' ABI tag). Defaults to OFF.
#                                  [Since CMake 2.8.3]
#
#   Boost_USE_STLPORT            If enabled, searches for boost libraries
#                                compiled against the STLPort standard
#                                library ('p' ABI tag). Defaults to OFF.
#                                  [Since CMake 2.8.3]
#
#   Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS
#                                If enabled, searches for boost libraries
#                                compiled against the deprecated STLPort
#                                "native iostreams" feature ('n' ABI tag).
#                                Defaults to OFF.
#                                  [Since CMake 2.8.3]
#
# Other Variables used by this module which you may want to set.
#
#   Boost_ADDITIONAL_VERSIONS    A list of version numbers to use for searching
#                                the boost include directory.  Please see
#                                the documentation above regarding this
#                                annoying, but necessary variable :(
#
#   Boost_DEBUG                  Set this to TRUE to enable debugging output
#                                of FindBoost.cmake if you are having problems.
#                                Please enable this before filing any bug
#                                reports.
#
#   Boost_DETAILED_FAILURE_MSG   FindBoost doesn't output detailed information
#                                about why it failed or how to fix the problem
#                                unless this is set to TRUE or the REQUIRED
#                                keyword is specified in find_package().
#                                  [Since CMake 2.8.0]
#
#   Boost_COMPILER               Set this to the compiler suffix used by Boost
#                                (e.g. "-gcc43") if FindBoost has problems finding
#                                the proper Boost installation
#
#   Boost_THREADAPI                When building boost.thread, sometimes the name of the
#                                library contains an additional "pthread" or "win32"
#                                string known as the threadapi.  This can happen when
#                                compiling against pthreads on Windows or win32 threads
#                                on Cygwin.  You may specify this variable and if set
#                                when FindBoost searches for the Boost threading library
#                                it will first try to match the threadapi you specify.
#                                  For Example: libboost_thread_win32-mgw45-mt-1_43.a
#                                might be found if you specified "win32" here before
#                                falling back on libboost_thread-mgw45-mt-1_43.a.
#                                  [Since CMake 2.8.3]
#
#   Boost_REALPATH               Resolves symbolic links for discovered boost libraries
#                                to assist with packaging.  For example, instead of
#                                Boost_SYSTEM_LIBRARY_RELEASE being resolved to
#                                "/usr/lib/libboost_system.so" it would be
#                                "/usr/lib/libboost_system.so.1.42.0" instead.
#                                This does not affect linking and should not be
#                                enabled unless the user needs this information.
#                                  [Since CMake 2.8.3]
#


#
# These last three variables are available also as environment variables:
# Also, note they are completely UPPERCASE, except Boost_DIR.
#
#   Boost_DIR or                 The preferred installation prefix for searching for
#   BOOST_ROOT or BOOSTROOT      Boost.  Set this if the module has problems finding
#                                the proper Boost installation.
#
#                                Note that Boost_DIR behaves exactly as <package>_DIR
#                                variables are documented to behave in find_package's
#                                Config mode.  That is, if it is set as a -D argument
#                                to CMake, it must point to the location of the
#                                BoostConfig.cmake or Boost-config.cmake file.  If it
#                                is set as an environment variable, it must point to
#                                the root of the boost installation.  BOOST_ROOT and
#                                BOOSTROOT, on the other hand, will point to the root
#                                in either case.
#
#                                To prevent falling back on the system paths, set
#                                Boost_NO_SYSTEM_PATHS to true.
#
#                                To avoid finding boost-cmake installations, set
#                                Boost_NO_BOOST_CMAKE to true.
#
#   BOOST_INCLUDEDIR             Set this to the include directory of Boost, if the
#                                module has problems finding the proper Boost installation
#
#   BOOST_LIBRARYDIR             Set this to the lib directory of Boost, if the
#                                module has problems finding the proper Boost installation
#
# Variables defined by this module:
#
#   Boost_FOUND                         System has Boost, this means the include dir was
#                                       found, as well as all the libraries specified in
#                                       the COMPONENTS list.
#
#   Boost_INCLUDE_DIRS                  Boost include directories: not cached
#
#   Boost_INCLUDE_DIR                   This is almost the same as above, but this one is
#                                       cached and may be modified by advanced users
#
#   Boost_LIBRARIES                     Link to these to use the Boost libraries that you
#                                       specified: not cached
#
#   Boost_LIBRARY_DIRS                  The path to where the Boost library files are.
#
#   Boost_VERSION                       The version number of the boost libraries that
#                                       have been found, same as in version.hpp from Boost
#
#   Boost_LIB_VERSION                   The version number in filename form as
#                                       it's appended to the library filenames
#
#   Boost_MAJOR_VERSION                 major version number of boost
#   Boost_MINOR_VERSION                 minor version number of boost
#   Boost_SUBMINOR_VERSION              subminor version number of boost
#
#   Boost_LIB_DIAGNOSTIC_DEFINITIONS    [WIN32 Only] You can call
#                                       add_definitions(${Boost_LIB_DIAGNOSTIC_DEFINITIONS})
#                                       to have diagnostic information about Boost's
#                                       automatic linking outputted during compilation time.
#
# For each component you specify in find_package(), the following (UPPER-CASE)
# variables are set.  You can use these variables if you would like to pick and
# choose components for your targets instead of just using Boost_LIBRARIES.
#
#   Boost_${COMPONENT}_FOUND            True IF the Boost library "component" was found.
#
#   Boost_${COMPONENT}_LIBRARY          Contains the libraries for the specified Boost
#                                       "component" (includes debug and optimized keywords
#                                       when needed).

#=============================================================================
# Copyright 2006-2009 Kitware, Inc.
# Copyright 2006-2008 Andreas Schneider <mail@cynapses.org>
# Copyright 2007      Wengo
# Copyright 2007      Mike Jackson
# Copyright 2008      Andreas Pakulat <apaku@gmx.de>
# Copyright 2008-2012 Philip Lowman <philip@yhbt.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)


#-------------------------------------------------------------------------------
# Before we go searching, check whether boost-cmake is avaialble, unless the
# user specifically asked NOT to search for boost-cmake.
#
# If Boost_DIR is set, this behaves as any find_package call would. If not,
# it looks at BOOST_ROOT and BOOSTROOT to find Boost.
#
if (NOT Boost_NO_BOOST_CMAKE)
  # If Boost_DIR is not set, look for BOOSTROOT and BOOST_ROOT as alternatives,
  # since these are more conventional for Boost.
  if ("$ENV{Boost_DIR}" STREQUAL "")
    if (NOT "$ENV{BOOST_ROOT}" STREQUAL "")
      set(ENV{Boost_DIR} $ENV{BOOST_ROOT})
    elseif (NOT "$ENV{BOOSTROOT}" STREQUAL "")
      set(ENV{Boost_DIR} $ENV{BOOSTROOT})
    endif()
  endif()

  # Do the same find_package call but look specifically for the CMake version.
  # Note that args are passed in the Boost_FIND_xxxxx variables, so there is no
  # need to delegate them to this find_package call.
  find_package(Boost QUIET NO_MODULE)

  # If we found boost-cmake, then we're done.  Print out what we found.
  # Otherwise let the rest of the module try to find it.
  if (Boost_FOUND)
    message("Boost ${Boost_FIND_VERSION} found.")
    if (Boost_FIND_COMPONENTS)
      message("Found Boost components:")
      message("   ${Boost_FIND_COMPONENTS}")
    endif()
    return()
  endif()
endif()


#-------------------------------------------------------------------------------
#  FindBoost functions & macros
#

############################################
#
# Check the existence of the libraries.
#
############################################
# This macro was taken directly from the FindQt4.cmake file that is included
# with the CMake distribution. This is NOT my work. All work was done by the
# original authors of the FindQt4.cmake file. Only minor modifications were
# made to remove references to Qt and make this file more generally applicable
# And ELSE/ENDIF pairs were removed for readability.
#########################################################################

macro(_Boost_ADJUST_LIB_VARS basename)
  if(Boost_INCLUDE_DIR )
    if(Boost_${basename}_LIBRARY_DEBUG AND Boost_${basename}_LIBRARY_RELEASE)
      # if the generator supports configuration types then set
      # optimized and debug libraries, or if the CMAKE_BUILD_TYPE has a value
      if(CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE)
        set(Boost_${basename}_LIBRARY optimized ${Boost_${basename}_LIBRARY_RELEASE} debug ${Boost_${basename}_LIBRARY_DEBUG})
      else()
        # if there are no configuration types and CMAKE_BUILD_TYPE has no value
        # then just use the release libraries
        set(Boost_${basename}_LIBRARY ${Boost_${basename}_LIBRARY_RELEASE} )
      endif()
      # FIXME: This probably should be set for both cases
      set(Boost_${basename}_LIBRARIES optimized ${Boost_${basename}_LIBRARY_RELEASE} debug ${Boost_${basename}_LIBRARY_DEBUG})
    endif()

    # if only the release version was found, set the debug variable also to the release version
    if(Boost_${basename}_LIBRARY_RELEASE AND NOT Boost_${basename}_LIBRARY_DEBUG)
      set(Boost_${basename}_LIBRARY_DEBUG ${Boost_${basename}_LIBRARY_RELEASE})
      set(Boost_${basename}_LIBRARY       ${Boost_${basename}_LIBRARY_RELEASE})
      set(Boost_${basename}_LIBRARIES     ${Boost_${basename}_LIBRARY_RELEASE})
    endif()

    # if only the debug version was found, set the release variable also to the debug version
    if(Boost_${basename}_LIBRARY_DEBUG AND NOT Boost_${basename}_LIBRARY_RELEASE)
      set(Boost_${basename}_LIBRARY_RELEASE ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARY         ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARIES       ${Boost_${basename}_LIBRARY_DEBUG})
    endif()

    # If the debug & release library ends up being the same, omit the keywords
    if(${Boost_${basename}_LIBRARY_RELEASE} STREQUAL ${Boost_${basename}_LIBRARY_DEBUG})
      set(Boost_${basename}_LIBRARY   ${Boost_${basename}_LIBRARY_RELEASE} )
      set(Boost_${basename}_LIBRARIES ${Boost_${basename}_LIBRARY_RELEASE} )
    endif()

    if(Boost_${basename}_LIBRARY)
      set(Boost_${basename}_LIBRARY ${Boost_${basename}_LIBRARY} CACHE FILEPATH "The Boost ${basename} library")

      # Remove superfluous "debug" / "optimized" keywords from
      # Boost_LIBRARY_DIRS
      foreach(_boost_my_lib ${Boost_${basename}_LIBRARY})
        get_filename_component(_boost_my_lib_path "${_boost_my_lib}" PATH)
        list(APPEND Boost_LIBRARY_DIRS ${_boost_my_lib_path})
      endforeach()
      list(REMOVE_DUPLICATES Boost_LIBRARY_DIRS)

      set(Boost_LIBRARY_DIRS ${Boost_LIBRARY_DIRS} CACHE FILEPATH "Boost library directory")
      set(Boost_${basename}_FOUND ON CACHE INTERNAL "Whether the Boost ${basename} library found")
    endif()

  endif()
  # Make variables changeble to the advanced user
  mark_as_advanced(
      Boost_${basename}_LIBRARY
      Boost_${basename}_LIBRARY_RELEASE
      Boost_${basename}_LIBRARY_DEBUG
  )
endmacro()

#-------------------------------------------------------------------------------

#
# Runs compiler with "-dumpversion" and parses major/minor
# version with a regex.
#
function(_Boost_COMPILER_DUMPVERSION _OUTPUT_VERSION)

  exec_program(${CMAKE_CXX_COMPILER}
    ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
    OUTPUT_VARIABLE _boost_COMPILER_VERSION
  )
  string(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1\\2"
    _boost_COMPILER_VERSION ${_boost_COMPILER_VERSION})

  set(${_OUTPUT_VERSION} ${_boost_COMPILER_VERSION} PARENT_SCOPE)
endfunction()

#
# A convenience function for marking desired components
# as found or not
#
function(_Boost_MARK_COMPONENTS_FOUND _yes_or_no)
  foreach(COMPONENT ${Boost_FIND_COMPONENTS})
    string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
    set(Boost_${UPPERCOMPONENT}_FOUND ${_yes_or_no} CACHE INTERNAL "Whether the Boost ${COMPONENT} library found" FORCE)
  endforeach()
endfunction()

#
# Take a list of libraries with "thread" in it
# and prepend duplicates with "thread_${Boost_THREADAPI}"
# at the front of the list
#
function(_Boost_PREPEND_LIST_WITH_THREADAPI _output)
  set(_orig_libnames ${ARGN})
  string(REPLACE "thread" "thread_${Boost_THREADAPI}" _threadapi_libnames "${_orig_libnames}")
  set(${_output} ${_threadapi_libnames} ${_orig_libnames} PARENT_SCOPE)
endfunction()

#
# If a library is found, replace its cache entry with its REALPATH
#
function(_Boost_SWAP_WITH_REALPATH _library _docstring)
  if(${_library})
    get_filename_component(_boost_filepathreal ${${_library}} REALPATH)
    unset(${_library} CACHE)
    set(${_library} ${_boost_filepathreal} CACHE FILEPATH "${_docstring}")
  endif()
endfunction()

function(_Boost_CHECK_SPELLING _var)
  if(${_var})
    string(TOUPPER ${_var} _var_UC)
    message(FATAL_ERROR "ERROR: ${_var} is not the correct spelling.  The proper spelling is ${_var_UC}.")
  endif()
endfunction()

# Guesses Boost's compiler prefix used in built library names
# Returns the guess by setting the variable pointed to by _ret
function(_Boost_GUESS_COMPILER_PREFIX _ret)
  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel"
      OR "${CMAKE_CXX_COMPILER}" MATCHES "icl"
      OR "${CMAKE_CXX_COMPILER}" MATCHES "icpc")
    if(WIN32)
      set (_boost_COMPILER "-iw")
    else()
      set (_boost_COMPILER "-il")
    endif()
  elseif (MSVC11)
    set(_boost_COMPILER "-vc110")
  elseif (MSVC10)
    set(_boost_COMPILER "-vc100")
  elseif (MSVC90)
    set(_boost_COMPILER "-vc90")
  elseif (MSVC80)
    set(_boost_COMPILER "-vc80")
  elseif (MSVC71)
    set(_boost_COMPILER "-vc71")
  elseif (MSVC70) # Good luck!
    set(_boost_COMPILER "-vc7") # yes, this is correct
  elseif (MSVC60) # Good luck!
    set(_boost_COMPILER "-vc6") # yes, this is correct
  elseif (BORLAND)
    set(_boost_COMPILER "-bcb")
  elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "SunPro")
    set(_boost_COMPILER "-sw")
  elseif (MINGW)
    if(${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION} VERSION_LESS 1.34)
        set(_boost_COMPILER "-mgw") # no GCC version encoding prior to 1.34
    else()
      _Boost_COMPILER_DUMPVERSION(_boost_COMPILER_VERSION)
      set(_boost_COMPILER "-mgw${_boost_COMPILER_VERSION}")
    endif()
  elseif (UNIX)
    if (CMAKE_COMPILER_IS_GNUCXX)
      if(${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION} VERSION_LESS 1.34)
        set(_boost_COMPILER "-gcc") # no GCC version encoding prior to 1.34
      else()
        _Boost_COMPILER_DUMPVERSION(_boost_COMPILER_VERSION)
        # Determine which version of GCC we have.
        if(APPLE)
          if(Boost_MINOR_VERSION)
            if(${Boost_MINOR_VERSION} GREATER 35)
              # In Boost 1.36.0 and newer, the mangled compiler name used
              # on Mac OS X/Darwin is "xgcc".
              set(_boost_COMPILER "-xgcc${_boost_COMPILER_VERSION}")
            else()
              # In Boost <= 1.35.0, there is no mangled compiler name for
              # the Mac OS X/Darwin version of GCC.
              set(_boost_COMPILER "")
            endif()
          else()
            # We don't know the Boost version, so assume it's
            # pre-1.36.0.
            set(_boost_COMPILER "")
          endif()
        else()
          set(_boost_COMPILER "-gcc${_boost_COMPILER_VERSION}")
        endif()
      endif()
    endif ()
  else()
    # TODO at least Boost_DEBUG here?
    set(_boost_COMPILER "")
  endif()
  set(${_ret} ${_boost_COMPILER} PARENT_SCOPE)
endfunction()

#
# End functions/macros
#
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# main.
#-------------------------------------------------------------------------------

if(NOT DEFINED Boost_USE_MULTITHREADED)
    set(Boost_USE_MULTITHREADED TRUE)
endif()

# Check the version of Boost against the requested version.
if(Boost_FIND_VERSION AND NOT Boost_FIND_VERSION_MINOR)
  message(SEND_ERROR "When requesting a specific version of Boost, you must provide at least the major and minor version numbers, e.g., 1.34")
endif()

if(Boost_FIND_VERSION_EXACT)
  # The version may appear in a directory with or without the patch
  # level, even when the patch level is non-zero.
  set(_boost_TEST_VERSIONS
    "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}.${Boost_FIND_VERSION_PATCH}"
    "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
else()
  # The user has not requested an exact version.  Among known
  # versions, find those that are acceptable to the user request.
  set(_Boost_KNOWN_VERSIONS ${Boost_ADDITIONAL_VERSIONS}
    "1.56.0" "1.56" "1.55.0" "1.55" "1.54.0" "1.54"
    "1.53.0" "1.53" "1.52.0" "1.52" "1.51.0" "1.51"
    "1.50.0" "1.50" "1.49.0" "1.49" "1.48.0" "1.48" "1.47.0" "1.47" "1.46.1"
    "1.46.0" "1.46" "1.45.0" "1.45" "1.44.0" "1.44" "1.43.0" "1.43" "1.42.0" "1.42"
    "1.41.0" "1.41" "1.40.0" "1.40" "1.39.0" "1.39" "1.38.0" "1.38" "1.37.0" "1.37"
    "1.36.1" "1.36.0" "1.36" "1.35.1" "1.35.0" "1.35" "1.34.1" "1.34.0"
    "1.34" "1.33.1" "1.33.0" "1.33")
  set(_boost_TEST_VERSIONS)
  if(Boost_FIND_VERSION)
    set(_Boost_FIND_VERSION_SHORT "${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
    # Select acceptable versions.
    foreach(version ${_Boost_KNOWN_VERSIONS})
      if(NOT "${version}" VERSION_LESS "${Boost_FIND_VERSION}")
        # This version is high enough.
        list(APPEND _boost_TEST_VERSIONS "${version}")
      elseif("${version}.99" VERSION_EQUAL "${_Boost_FIND_VERSION_SHORT}.99")
        # This version is a short-form for the requested version with
        # the patch level dropped.
        list(APPEND _boost_TEST_VERSIONS "${version}")
      endif()
    endforeach()
  else()
    # Any version is acceptable.
    set(_boost_TEST_VERSIONS "${_Boost_KNOWN_VERSIONS}")
  endif()
endif()

# The reason that we failed to find Boost. This will be set to a
# user-friendly message when we fail to find some necessary piece of
# Boost.
set(Boost_ERROR_REASON)

  if(Boost_DEBUG)
    # Output some of their choices
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "_boost_TEST_VERSIONS = ${_boost_TEST_VERSIONS}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Boost_USE_MULTITHREADED = ${Boost_USE_MULTITHREADED}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Boost_USE_STATIC_LIBS = ${Boost_USE_STATIC_LIBS}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Boost_USE_STATIC_RUNTIME = ${Boost_USE_STATIC_RUNTIME}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Boost_ADDITIONAL_VERSIONS = ${Boost_ADDITIONAL_VERSIONS}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Boost_NO_SYSTEM_PATHS = ${Boost_NO_SYSTEM_PATHS}")
  endif()

  if(WIN32)
    # In windows, automatic linking is performed, so you do not have
    # to specify the libraries.  If you are linking to a dynamic
    # runtime, then you can choose to link to either a static or a
    # dynamic Boost library, the default is to do a static link.  You
    # can alter this for a specific library "whatever" by defining
    # BOOST_WHATEVER_DYN_LINK to force Boost library "whatever" to be
    # linked dynamically.  Alternatively you can force all Boost
    # libraries to dynamic link by defining BOOST_ALL_DYN_LINK.

    # This feature can be disabled for Boost library "whatever" by
    # defining BOOST_WHATEVER_NO_LIB, or for all of Boost by defining
    # BOOST_ALL_NO_LIB.

    # If you want to observe which libraries are being linked against
    # then defining BOOST_LIB_DIAGNOSTIC will cause the auto-linking
    # code to emit a #pragma message each time a library is selected
    # for linking.
    set(Boost_LIB_DIAGNOSTIC_DEFINITIONS
      "-DBOOST_LIB_DIAGNOSTIC" CACHE STRING "Boost diagnostic define")
  endif()

  set(_boost_INCLUDE_SEARCH_DIRS_SYSTEM
    C:/boost/include
    C:/boost
    "$ENV{ProgramFiles}/boost/include"
    "$ENV{ProgramFiles}/boost"
    /sw/local/include
  )

  _Boost_CHECK_SPELLING(Boost_ROOT)
  _Boost_CHECK_SPELLING(Boost_LIBRARYDIR)
  _Boost_CHECK_SPELLING(Boost_INCLUDEDIR)

  # If BOOST_ROOT was defined in the environment, use it.
  if (NOT BOOST_ROOT AND NOT $ENV{Boost_DIR} STREQUAL "")
    set(BOOST_ROOT $ENV{Boost_DIR})
  endif()

  # If BOOST_ROOT was defined in the environment, use it.
  if (NOT BOOST_ROOT AND NOT $ENV{BOOST_ROOT} STREQUAL "")
    set(BOOST_ROOT $ENV{BOOST_ROOT})
  endif()

  # If BOOSTROOT was defined in the environment, use it.
  if (NOT BOOST_ROOT AND NOT $ENV{BOOSTROOT} STREQUAL "")
    set(BOOST_ROOT $ENV{BOOSTROOT})
  endif()

  # If BOOST_INCLUDEDIR was defined in the environment, use it.
  if( NOT $ENV{BOOST_INCLUDEDIR} STREQUAL "" )
    set(BOOST_INCLUDEDIR $ENV{BOOST_INCLUDEDIR})
  endif()

  # If BOOST_LIBRARYDIR was defined in the environment, use it.
  if( NOT $ENV{BOOST_LIBRARYDIR} STREQUAL "" )
    set(BOOST_LIBRARYDIR $ENV{BOOST_LIBRARYDIR})
  endif()

  if( BOOST_ROOT )
    file(TO_CMAKE_PATH ${BOOST_ROOT} BOOST_ROOT)
  endif()

  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "Declared as CMake or Environmental Variables:")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "  BOOST_ROOT = ${BOOST_ROOT}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "  BOOST_INCLUDEDIR = ${BOOST_INCLUDEDIR}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "  BOOST_LIBRARYDIR = ${BOOST_LIBRARYDIR}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                   "_boost_TEST_VERSIONS = ${_boost_TEST_VERSIONS}")
  endif()

  if( Boost_NO_SYSTEM_PATHS)
    set(_boost_FIND_OPTIONS NO_CMAKE_SYSTEM_PATH)
  else()
    set(_boost_INCLUDE_SEARCH_DIRS ${_boost_INCLUDE_SEARCH_DIRS_SYSTEM})
  endif()

  if( BOOST_ROOT )
    set(_boost_INCLUDE_SEARCH_DIRS
      ${BOOST_ROOT}/include
      ${BOOST_ROOT}
      ${_boost_INCLUDE_SEARCH_DIRS})
  endif()

  # prepend BOOST_INCLUDEDIR to search path if specified
  if( BOOST_INCLUDEDIR )
    file(TO_CMAKE_PATH ${BOOST_INCLUDEDIR} BOOST_INCLUDEDIR)
    set(_boost_INCLUDE_SEARCH_DIRS
      ${BOOST_INCLUDEDIR} ${_boost_INCLUDE_SEARCH_DIRS})
  endif()

  # ------------------------------------------------------------------------
  #  Search for Boost include DIR
  # ------------------------------------------------------------------------
  # Try to find Boost by stepping backwards through the Boost versions
  # we know about.
  if( NOT Boost_INCLUDE_DIR )
    # Build a list of path suffixes for each version.
    set(_boost_PATH_SUFFIXES)
    foreach(_boost_VER ${_boost_TEST_VERSIONS})
      # Add in a path suffix, based on the required version, ideally
      # we could read this from version.hpp, but for that to work we'd
      # need to know the include dir already
      set(_boost_BOOSTIFIED_VERSION)

      # Transform 1.35 => 1_35 and 1.36.0 => 1_36_0
      if(_boost_VER MATCHES "[0-9]+\\.[0-9]+\\.[0-9]+")
          string(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\1_\\2_\\3"
            _boost_BOOSTIFIED_VERSION ${_boost_VER})
      elseif(_boost_VER MATCHES "[0-9]+\\.[0-9]+")
          string(REGEX REPLACE "([0-9]+)\\.([0-9]+)" "\\1_\\2"
            _boost_BOOSTIFIED_VERSION ${_boost_VER})
      endif()

      list(APPEND _boost_PATH_SUFFIXES "boost-${_boost_BOOSTIFIED_VERSION}")
      list(APPEND _boost_PATH_SUFFIXES "boost_${_boost_BOOSTIFIED_VERSION}")

    endforeach()

    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "Include debugging info:")
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "  _boost_INCLUDE_SEARCH_DIRS = ${_boost_INCLUDE_SEARCH_DIRS}")
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "  _boost_PATH_SUFFIXES = ${_boost_PATH_SUFFIXES}")
    endif()

    # Look for a standard boost header file.
    find_path(Boost_INCLUDE_DIR
      NAMES         boost/config.hpp
      HINTS         ${_boost_INCLUDE_SEARCH_DIRS}
      PATH_SUFFIXES ${_boost_PATH_SUFFIXES}
      ${_boost_FIND_OPTIONS}
      )
  endif()

  # ------------------------------------------------------------------------
  #  Extract version information from version.hpp
  # ------------------------------------------------------------------------

  if(Boost_INCLUDE_DIR)
    # Extract Boost_VERSION and Boost_LIB_VERSION from version.hpp
    # Read the whole file:
    #
    set(BOOST_VERSION 0)
    set(BOOST_LIB_VERSION "")
    file(STRINGS "${Boost_INCLUDE_DIR}/boost/version.hpp" _boost_VERSION_HPP_CONTENTS REGEX "#define BOOST_(LIB_)?VERSION ")
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "location of version.hpp: ${Boost_INCLUDE_DIR}/boost/version.hpp")
    endif()

    string(REGEX REPLACE ".*#define BOOST_VERSION ([0-9]+).*" "\\1" Boost_VERSION "${_boost_VERSION_HPP_CONTENTS}")
    string(REGEX REPLACE ".*#define BOOST_LIB_VERSION \"([0-9_]+)\".*" "\\1" Boost_LIB_VERSION "${_boost_VERSION_HPP_CONTENTS}")
    unset(_boost_VERSION_HPP_CONTENTS)

    set(Boost_LIB_VERSION ${Boost_LIB_VERSION} CACHE INTERNAL "The library version string for boost libraries")
    set(Boost_VERSION ${Boost_VERSION} CACHE INTERNAL "The version number for boost libraries")

    if(NOT "${Boost_VERSION}" STREQUAL "0")
      math(EXPR Boost_MAJOR_VERSION "${Boost_VERSION} / 100000")
      math(EXPR Boost_MINOR_VERSION "${Boost_VERSION} / 100 % 1000")
      math(EXPR Boost_SUBMINOR_VERSION "${Boost_VERSION} % 100")

      set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}Boost version: ${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}\nBoost include path: ${Boost_INCLUDE_DIR}")
    endif()
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "version.hpp reveals boost "
                     "${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
    endif()
  else()
    set(Boost_ERROR_REASON
      "${Boost_ERROR_REASON}Unable to find the Boost header files. Please set BOOST_ROOT to the root directory containing Boost or BOOST_INCLUDEDIR to the directory containing Boost's headers.")
  endif()

  # ------------------------------------------------------------------------
  #  Suffix initialization and compiler suffix detection.
  # ------------------------------------------------------------------------

  # Setting some more suffixes for the library
  set(Boost_LIB_PREFIX "")
  if ( WIN32 AND Boost_USE_STATIC_LIBS AND NOT CYGWIN)
    set(Boost_LIB_PREFIX "lib")
  endif()

  if (Boost_COMPILER)
    set(_boost_COMPILER ${Boost_COMPILER})
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "using user-specified Boost_COMPILER = ${_boost_COMPILER}")
    endif()
  else()
    # Attempt to guess the compiler suffix
    # NOTE: this is not perfect yet, if you experience any issues
    # please report them and use the Boost_COMPILER variable
    # to work around the problems.
    _Boost_GUESS_COMPILER_PREFIX(_boost_COMPILER)
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
        "guessed _boost_COMPILER = ${_boost_COMPILER}")
    endif()
  endif()

  set (_boost_MULTITHREADED "-mt")
  if( NOT Boost_USE_MULTITHREADED )
    set (_boost_MULTITHREADED "")
  endif()
  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
      "_boost_MULTITHREADED = ${_boost_MULTITHREADED}")
  endif()

  #======================
  # Systematically build up the Boost ABI tag
  # http://boost.org/doc/libs/1_41_0/more/getting_started/windows.html#library-naming
  set( _boost_RELEASE_ABI_TAG "-")
  set( _boost_DEBUG_ABI_TAG   "-")
  # Key       Use this library when:
  #  s        linking statically to the C++ standard library and
  #           compiler runtime support libraries.
  if(Boost_USE_STATIC_RUNTIME)
    set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}s")
    set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}s")
  endif()
  #  g        using debug versions of the standard and runtime
  #           support libraries
  if(WIN32)
    if(MSVC OR "${CMAKE_CXX_COMPILER}" MATCHES "icl"
            OR "${CMAKE_CXX_COMPILER}" MATCHES "icpc")
      set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}g")
    endif()
  endif()
  #  y        using special debug build of python
  if(Boost_USE_DEBUG_PYTHON)
    set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}y")
  endif()
  #  d        using a debug version of your code
  set(_boost_DEBUG_ABI_TAG "${_boost_DEBUG_ABI_TAG}d")
  #  p        using the STLport standard library rather than the
  #           default one supplied with your compiler
  if(Boost_USE_STLPORT)
    set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}p")
    set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}p")
  endif()
  #  n        using the STLport deprecated "native iostreams" feature
  if(Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS)
    set( _boost_RELEASE_ABI_TAG "${_boost_RELEASE_ABI_TAG}n")
    set( _boost_DEBUG_ABI_TAG   "${_boost_DEBUG_ABI_TAG}n")
  endif()

  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
      "_boost_RELEASE_ABI_TAG = ${_boost_RELEASE_ABI_TAG}")
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
      "_boost_DEBUG_ABI_TAG = ${_boost_DEBUG_ABI_TAG}")
  endif()

  # ------------------------------------------------------------------------
  #  Begin finding boost libraries
  # ------------------------------------------------------------------------

  if(BOOST_ROOT)
    set(_boost_LIBRARY_SEARCH_DIRS_ALWAYS
      ${BOOST_ROOT}/lib
      ${BOOST_ROOT}/stage/lib)
  endif()
  set(_boost_LIBRARY_SEARCH_DIRS_ALWAYS
    ${_boost_LIBRARY_SEARCH_DIRS_ALWAYS}
    ${Boost_INCLUDE_DIR}/lib
    ${Boost_INCLUDE_DIR}/../lib
    ${Boost_INCLUDE_DIR}/stage/lib
  )
  set(_boost_LIBRARY_SEARCH_DIRS_SYSTEM
    C:/boost/lib
    C:/boost
    "$ENV{ProgramFiles}/boost/boost_${Boost_MAJOR_VERSION}_${Boost_MINOR_VERSION}_${Boost_SUBMINOR_VERSION}/lib"
    "$ENV{ProgramFiles}/boost/boost_${Boost_MAJOR_VERSION}_${Boost_MINOR_VERSION}/lib"
    "$ENV{ProgramFiles}/boost/lib"
    "$ENV{ProgramFiles}/boost"
    /sw/local/lib
  )
  set(_boost_LIBRARY_SEARCH_DIRS ${_boost_LIBRARY_SEARCH_DIRS_ALWAYS})
  if( Boost_NO_SYSTEM_PATHS )
    set(_boost_FIND_OPTIONS NO_CMAKE_SYSTEM_PATH)
  else()
    list(APPEND _boost_LIBRARY_SEARCH_DIRS ${_boost_LIBRARY_SEARCH_DIRS_SYSTEM})
  endif()

  # prepend BOOST_LIBRARYDIR to search path if specified
  if( BOOST_LIBRARYDIR )
    file(TO_CMAKE_PATH ${BOOST_LIBRARYDIR} BOOST_LIBRARYDIR)
    set(_boost_LIBRARY_SEARCH_DIRS
      ${BOOST_LIBRARYDIR} ${_boost_LIBRARY_SEARCH_DIRS})
  endif()

  if(Boost_DEBUG)
    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
      "_boost_LIBRARY_SEARCH_DIRS = ${_boost_LIBRARY_SEARCH_DIRS}")
  endif()

  # Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
  if( Boost_USE_STATIC_LIBS )
    set( _boost_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
    if(WIN32)
      set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
    else()
      set(CMAKE_FIND_LIBRARY_SUFFIXES .a )
    endif()
  endif()

  # We want to use the tag inline below without risking double dashes
  if(_boost_RELEASE_ABI_TAG)
    if(${_boost_RELEASE_ABI_TAG} STREQUAL "-")
      set(_boost_RELEASE_ABI_TAG "")
    endif()
  endif()
  if(_boost_DEBUG_ABI_TAG)
    if(${_boost_DEBUG_ABI_TAG} STREQUAL "-")
      set(_boost_DEBUG_ABI_TAG "")
    endif()
  endif()

  # The previous behavior of FindBoost when Boost_USE_STATIC_LIBS was enabled
  # on WIN32 was to:
  #  1. Search for static libs compiled against a SHARED C++ standard runtime library (use if found)
  #  2. Search for static libs compiled against a STATIC C++ standard runtime library (use if found)
  # We maintain this behavior since changing it could break people's builds.
  # To disable the ambiguous behavior, the user need only
  # set Boost_USE_STATIC_RUNTIME either ON or OFF.
  set(_boost_STATIC_RUNTIME_WORKAROUND false)
  if(WIN32 AND Boost_USE_STATIC_LIBS)
    if(NOT DEFINED Boost_USE_STATIC_RUNTIME)
      set(_boost_STATIC_RUNTIME_WORKAROUND true)
    endif()
  endif()

  # On versions < 1.35, remove the System library from the considered list
  # since it wasn't added until 1.35.
  if(Boost_VERSION AND Boost_FIND_COMPONENTS)
     if(Boost_VERSION LESS 103500)
       list(REMOVE_ITEM Boost_FIND_COMPONENTS system)
     endif()
  endif()

  foreach(COMPONENT ${Boost_FIND_COMPONENTS})
    string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
    set( Boost_${UPPERCOMPONENT}_LIBRARY "Boost_${UPPERCOMPONENT}_LIBRARY-NOTFOUND" )
    set( Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE "Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE-NOTFOUND" )
    set( Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG "Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG-NOTFOUND")

    set( _boost_docstring_release "Boost ${COMPONENT} library (release)")
    set( _boost_docstring_debug   "Boost ${COMPONENT} library (debug)")

    #
    # Find RELEASE libraries
    #
    set(_boost_RELEASE_NAMES
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT} )
    if(_boost_STATIC_RUNTIME_WORKAROUND)
      set(_boost_RELEASE_STATIC_ABI_TAG "-s${_boost_RELEASE_ABI_TAG}")
      list(APPEND _boost_RELEASE_NAMES
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_RELEASE_STATIC_ABI_TAG} )
    endif()
    if(Boost_THREADAPI AND ${COMPONENT} STREQUAL "thread")
       _Boost_PREPEND_LIST_WITH_THREADAPI(_boost_RELEASE_NAMES ${_boost_RELEASE_NAMES})
    endif()
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "Searching for ${UPPERCOMPONENT}_LIBRARY_RELEASE: ${_boost_RELEASE_NAMES}")
    endif()
    find_library(Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE
        NAMES ${_boost_RELEASE_NAMES}
        HINTS ${_boost_LIBRARY_SEARCH_DIRS}
        ${_boost_FIND_OPTIONS}
        DOC "${_boost_docstring_release}"
    )

    #
    # Find DEBUG libraries
    #
    set(_boost_DEBUG_NAMES
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}-${Boost_LIB_VERSION}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_ABI_TAG}
      ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}
      ${Boost_LIB_PREFIX}boost_${COMPONENT} )
    if(_boost_STATIC_RUNTIME_WORKAROUND)
      set(_boost_DEBUG_STATIC_ABI_TAG "-s${_boost_DEBUG_ABI_TAG}")
      list(APPEND _boost_DEBUG_NAMES
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_COMPILER}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG}-${Boost_LIB_VERSION}
        ${Boost_LIB_PREFIX}boost_${COMPONENT}${_boost_MULTITHREADED}${_boost_DEBUG_STATIC_ABI_TAG} )
    endif()
    if(Boost_THREADAPI AND ${COMPONENT} STREQUAL "thread")
       _Boost_PREPEND_LIST_WITH_THREADAPI(_boost_DEBUG_NAMES ${_boost_DEBUG_NAMES})
    endif()
    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
                     "Searching for ${UPPERCOMPONENT}_LIBRARY_DEBUG: ${_boost_DEBUG_NAMES}")
    endif()
    find_library(Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG
        NAMES ${_boost_DEBUG_NAMES}
        HINTS ${_boost_LIBRARY_SEARCH_DIRS}
        ${_boost_FIND_OPTIONS}
        DOC "${_boost_docstring_debug}"
    )

    if(Boost_REALPATH)
      _Boost_SWAP_WITH_REALPATH(Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE "${_boost_docstring_release}")
      _Boost_SWAP_WITH_REALPATH(Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG   "${_boost_docstring_debug}"  )
    endif()

    _Boost_ADJUST_LIB_VARS(${UPPERCOMPONENT})

  endforeach()

  # Restore the original find library ordering
  if( Boost_USE_STATIC_LIBS )
    set(CMAKE_FIND_LIBRARY_SUFFIXES ${_boost_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
  endif()

  # ------------------------------------------------------------------------
  #  End finding boost libraries
  # ------------------------------------------------------------------------

  # ------------------------------------------------------------------------
  #  Begin long process of determining Boost_FOUND, starting with version
  #  number checks, followed by
  #  TODO: Ideally the version check logic should happen prior to searching
  #        for libraries...
  # ------------------------------------------------------------------------

  set(Boost_INCLUDE_DIRS
    ${Boost_INCLUDE_DIR}
  )

  set(Boost_FOUND FALSE)
  if(Boost_INCLUDE_DIR)
    set( Boost_FOUND TRUE )

    if(Boost_MAJOR_VERSION LESS "${Boost_FIND_VERSION_MAJOR}" )
      set( Boost_FOUND FALSE )
      set(_Boost_VERSION_AGE "old")
    elseif(Boost_MAJOR_VERSION EQUAL "${Boost_FIND_VERSION_MAJOR}" )
      if(Boost_MINOR_VERSION LESS "${Boost_FIND_VERSION_MINOR}" )
        set( Boost_FOUND FALSE )
        set(_Boost_VERSION_AGE "old")
      elseif(Boost_MINOR_VERSION EQUAL "${Boost_FIND_VERSION_MINOR}" )
        if( Boost_FIND_VERSION_PATCH AND Boost_SUBMINOR_VERSION LESS "${Boost_FIND_VERSION_PATCH}" )
          set( Boost_FOUND FALSE )
          set(_Boost_VERSION_AGE "old")
        endif()
      endif()
    endif()

    if (NOT Boost_FOUND)
      _Boost_MARK_COMPONENTS_FOUND(OFF)
    endif()

    if (Boost_FOUND AND Boost_FIND_VERSION_EXACT)
      # If the user requested an exact version of Boost, check
      # that. We already know that the Boost version we have is >= the
      # requested version.
      set(_Boost_VERSION_AGE "new")

      # If the user didn't specify a patchlevel, it's 0.
      if (NOT Boost_FIND_VERSION_PATCH)
        set(Boost_FIND_VERSION_PATCH 0)
      endif ()

      # We'll set Boost_FOUND true again if we have an exact version match.
      set(Boost_FOUND FALSE)
      _Boost_MARK_COMPONENTS_FOUND(OFF)
      if(Boost_MAJOR_VERSION EQUAL "${Boost_FIND_VERSION_MAJOR}" )
        if(Boost_MINOR_VERSION EQUAL "${Boost_FIND_VERSION_MINOR}" )
          if(Boost_SUBMINOR_VERSION EQUAL "${Boost_FIND_VERSION_PATCH}" )
            set( Boost_FOUND TRUE )
            _Boost_MARK_COMPONENTS_FOUND(ON)
          endif()
        endif()
      endif()
    endif ()

    if(NOT Boost_FOUND)
      # State that we found a version of Boost that is too new or too old.
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}\nDetected version of Boost is too ${_Boost_VERSION_AGE}. Requested version was ${Boost_FIND_VERSION_MAJOR}.${Boost_FIND_VERSION_MINOR}")
      if (Boost_FIND_VERSION_PATCH)
        set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}.${Boost_FIND_VERSION_PATCH}")
      endif ()
      if (NOT Boost_FIND_VERSION_EXACT)
        set(Boost_ERROR_REASON "${Boost_ERROR_REASON} (or newer)")
      endif ()
      set(Boost_ERROR_REASON "${Boost_ERROR_REASON}.")
    endif ()

    # Always check for missing components
    set(_boost_CHECKED_COMPONENT FALSE)
    set(_Boost_MISSING_COMPONENTS "")
    foreach(COMPONENT ${Boost_FIND_COMPONENTS})
      string(TOUPPER ${COMPONENT} COMPONENT)
      set(_boost_CHECKED_COMPONENT TRUE)
      if(NOT Boost_${COMPONENT}_FOUND)
        string(TOLOWER ${COMPONENT} COMPONENT)
        list(APPEND _Boost_MISSING_COMPONENTS ${COMPONENT})
        set( Boost_FOUND FALSE)
      endif()
    endforeach()

    if(Boost_DEBUG)
      message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] Boost_FOUND = ${Boost_FOUND}")
    endif()

    if (_Boost_MISSING_COMPONENTS)
      # We were unable to find some libraries, so generate a sensible
      # error message that lists the libraries we were unable to find.
      set(Boost_ERROR_REASON
        "${Boost_ERROR_REASON}\nThe following Boost libraries could not be found:\n")
      foreach(COMPONENT ${_Boost_MISSING_COMPONENTS})
        set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}        boost_${COMPONENT}\n")
      endforeach()

      list(LENGTH Boost_FIND_COMPONENTS Boost_NUM_COMPONENTS_WANTED)
      list(LENGTH _Boost_MISSING_COMPONENTS Boost_NUM_MISSING_COMPONENTS)
      if (${Boost_NUM_COMPONENTS_WANTED} EQUAL ${Boost_NUM_MISSING_COMPONENTS})
        set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}No Boost libraries were found. You may need to set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.")
      else ()
        set(Boost_ERROR_REASON
          "${Boost_ERROR_REASON}Some (but not all) of the required Boost libraries were found. You may need to install these additional Boost libraries. Alternatively, set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.")
      endif ()
    endif ()

    if( NOT Boost_LIBRARY_DIRS AND NOT _boost_CHECKED_COMPONENT )
      # Compatibility Code for backwards compatibility with CMake
      # 2.4's FindBoost module.

      # Look for the boost library path.
      # Note that the user may not have installed any libraries
      # so it is quite possible the Boost_LIBRARY_DIRS may not exist.
      set(_boost_LIB_DIR ${Boost_INCLUDE_DIR})

      if("${_boost_LIB_DIR}" MATCHES "boost-[0-9]+")
        get_filename_component(_boost_LIB_DIR ${_boost_LIB_DIR} PATH)
      endif()

      if("${_boost_LIB_DIR}" MATCHES "/include$")
        # Strip off the trailing "/include" in the path.
        get_filename_component(_boost_LIB_DIR ${_boost_LIB_DIR} PATH)
      endif()

      if(EXISTS "${_boost_LIB_DIR}/lib")
        set(_boost_LIB_DIR ${_boost_LIB_DIR}/lib)
      else()
        if(EXISTS "${_boost_LIB_DIR}/stage/lib")
          set(_boost_LIB_DIR ${_boost_LIB_DIR}/stage/lib)
        else()
          set(_boost_LIB_DIR "")
        endif()
      endif()

      if(_boost_LIB_DIR AND EXISTS "${_boost_LIB_DIR}")
        set(Boost_LIBRARY_DIRS ${_boost_LIB_DIR} CACHE FILEPATH "Boost library directory")
      endif()

    endif()

  else()
    set( Boost_FOUND FALSE)
  endif()

  # ------------------------------------------------------------------------
  #  Notification to end user about what was found
  # ------------------------------------------------------------------------

  if(Boost_FOUND)
      if(NOT Boost_FIND_QUIETLY)
        message(STATUS "Boost version: ${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
        if(Boost_FIND_COMPONENTS)
          message(STATUS "Found the following Boost libraries:")
        endif()
      endif()
      foreach( COMPONENT  ${Boost_FIND_COMPONENTS} )
        string( TOUPPER ${COMPONENT} UPPERCOMPONENT )
        if( Boost_${UPPERCOMPONENT}_FOUND )
          if(NOT Boost_FIND_QUIETLY)
            message (STATUS "  ${COMPONENT}")
          endif()
          set(Boost_LIBRARIES ${Boost_LIBRARIES} ${Boost_${UPPERCOMPONENT}_LIBRARY})
        endif()
      endforeach()
  else()
    if(Boost_FIND_REQUIRED)
      message(SEND_ERROR "Unable to find the requested Boost libraries.\n${Boost_ERROR_REASON}")
    else()
      if(NOT Boost_FIND_QUIETLY)
        # we opt not to automatically output Boost_ERROR_REASON here as
        # it could be quite lengthy and somewhat imposing in its requests
        # Since Boost is not always a required dependency we'll leave this
        # up to the end-user.
        if(Boost_DEBUG OR Boost_DETAILED_FAILURE_MSG)
          message(STATUS "Could NOT find Boost\n${Boost_ERROR_REASON}")
        else()
          message(STATUS "Could NOT find Boost")
        endif()
      endif()
    endif()
  endif()

  # show the Boost_INCLUDE_DIRS AND Boost_LIBRARIES variables only in the advanced view
  mark_as_advanced(Boost_INCLUDE_DIR
      Boost_INCLUDE_DIRS
      Boost_LIBRARY_DIRS
  )