summaryrefslogtreecommitdiff
path: root/Modules/BundleUtilities.cmake
blob: 0beff04fddbeec5c2fb43204d7a683b2cf0bc8dc (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
# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
BundleUtilities
---------------

Functions to help assemble a standalone bundle application.

A collection of CMake utility functions useful for dealing with ``.app``
bundles on the Mac and bundle-like directories on any OS.

The following functions are provided by this module:

.. code-block:: cmake

   fixup_bundle
   copy_and_fixup_bundle
   verify_app
   get_bundle_main_executable
   get_dotapp_dir
   get_bundle_and_executable
   get_bundle_all_executables
   get_item_key
   get_item_rpaths
   clear_bundle_keys
   set_bundle_key_values
   get_bundle_keys
   copy_resolved_item_into_bundle
   copy_resolved_framework_into_bundle
   fixup_bundle_item
   verify_bundle_prerequisites
   verify_bundle_symlinks

Requires CMake 2.6 or greater because it uses function, break and
``PARENT_SCOPE``.  Also depends on ``GetPrerequisites.cmake``.

DO NOT USE THESE FUNCTIONS AT CONFIGURE TIME (from ``CMakeLists.txt``)!
Instead, invoke them from an :command:`install(CODE)` or
:command:`install(SCRIPT)` rule.

.. code-block:: cmake

  fixup_bundle(<app> <libs> <dirs>)

Fix up ``<app>`` bundle in-place and make it standalone, such that it can be
drag-n-drop copied to another machine and run on that machine as long
as all of the system libraries are compatible.

If you pass plugins to ``fixup_bundle`` as the libs parameter, you should
install them or copy them into the bundle before calling ``fixup_bundle``.
The ``<libs>`` parameter is a list of libraries that must be fixed up, but
that cannot be determined by ``otool`` output analysis  (i.e. ``plugins``).

Gather all the keys for all the executables and libraries in a bundle,
and then, for each key, copy each prerequisite into the bundle.  Then
fix each one up according to its own list of prerequisites.

Then clear all the keys and call ``verify_app`` on the final bundle to
ensure that it is truly standalone.

.. versionadded:: 3.6
  As an optional parameter (``IGNORE_ITEM``) a list of file names can be passed,
  which are then ignored
  (e.g. ``IGNORE_ITEM "vcredist_x86.exe;vcredist_x64.exe"``).

.. code-block:: cmake

  copy_and_fixup_bundle(<src> <dst> <libs> <dirs>)

Makes a copy of the bundle ``<src>`` at location ``<dst>`` and then fixes up
the new copied bundle in-place at ``<dst>``.

.. code-block:: cmake

  verify_app(<app>)

Verifies that an application ``<app>`` appears valid based on running
analysis tools on it.  Calls :command:`message(FATAL_ERROR)` if the application
is not verified.

.. versionadded:: 3.6
  As an optional parameter (``IGNORE_ITEM``) a list of file names can be passed,
  which are then ignored
  (e.g. ``IGNORE_ITEM "vcredist_x86.exe;vcredist_x64.exe"``)

.. code-block:: cmake

  get_bundle_main_executable(<bundle> <result_var>)

The result will be the full path name of the bundle's main executable
file or an ``error:`` prefixed string if it could not be determined.

.. code-block:: cmake

  get_dotapp_dir(<exe> <dotapp_dir_var>)

Returns the nearest parent dir whose name ends with ``.app`` given the
full path to an executable.  If there is no such parent dir, then
simply return the dir containing the executable.

The returned directory may or may not exist.

.. code-block:: cmake

  get_bundle_and_executable(<app> <bundle_var> <executable_var> <valid_var>)

Takes either a ``.app`` directory name or the name of an executable
nested inside a ``.app`` directory and returns the path to the ``.app``
directory in ``<bundle_var>`` and the path to its main executable in
``<executable_var>``.

.. code-block:: cmake

  get_bundle_all_executables(<bundle> <exes_var>)

Scans ``<bundle>`` bundle recursively for all ``<exes_var>`` executable
files and accumulates them into a variable.

.. code-block:: cmake

  get_item_key(<item> <key_var>)

Given ``<item>`` file name, generate ``<key_var>`` key that should be unique
considering the set of libraries that need copying or fixing up to
make a bundle standalone.  This is essentially the file name including
extension with ``.`` replaced by ``_``

This key is used as a prefix for CMake variables so that we can
associate a set of variables with a given item based on its key.

.. code-block:: cmake

  clear_bundle_keys(<keys_var>)

Loop over the ``<keys_var>`` list of keys, clearing all the variables
associated with each key.  After the loop, clear the list of keys itself.

Caller of ``get_bundle_keys`` should call ``clear_bundle_keys`` when done with
list of keys.

.. code-block:: cmake

  set_bundle_key_values(<keys_var> <context> <item> <exepath> <dirs>
                        <copyflag> [<rpaths>])

Add ``<keys_var>`` key to the list (if necessary) for the given item.
If added, also set all the variables associated with that key.

.. code-block:: cmake

  get_bundle_keys(<app> <libs> <dirs> <keys_var>)

Loop over all the executable and library files within ``<app>`` bundle (and
given as extra ``<libs>``) and accumulate a list of keys representing
them.  Set values associated with each key such that we can loop over
all of them and copy prerequisite libs into the bundle and then do
appropriate ``install_name_tool`` fixups.

.. versionadded:: 3.6
  As an optional parameter (``IGNORE_ITEM``) a list of file names can be passed,
  which are then ignored
  (e.g. ``IGNORE_ITEM "vcredist_x86.exe;vcredist_x64.exe"``)

.. code-block:: cmake

  copy_resolved_item_into_bundle(<resolved_item> <resolved_embedded_item>)

Copy a resolved item into the bundle if necessary.
Copy is not necessary, if the ``<resolved_item>`` is "the same as" the
``<resolved_embedded_item>``.

.. code-block:: cmake

  copy_resolved_framework_into_bundle(<resolved_item> <resolved_embedded_item>)

Copy a resolved framework into the bundle if necessary.
Copy is not necessary, if the ``<resolved_item>`` is "the same as" the
``<resolved_embedded_item>``.

By default, ``BU_COPY_FULL_FRAMEWORK_CONTENTS`` is not set.  If you want
full frameworks embedded in your bundles, set
``BU_COPY_FULL_FRAMEWORK_CONTENTS`` to ``ON`` before calling fixup_bundle.  By
default, ``COPY_RESOLVED_FRAMEWORK_INTO_BUNDLE`` copies the framework
dylib itself plus the framework ``Resources`` directory.

.. code-block:: cmake

  fixup_bundle_item(<resolved_embedded_item> <exepath> <dirs>)

Get the direct/non-system prerequisites of the ``<resolved_embedded_item>``.
For each prerequisite, change the way it is referenced to the value of
the ``_EMBEDDED_ITEM`` keyed variable for that prerequisite.  (Most likely
changing to an ``@executable_path`` style reference.)

This function requires that the ``<resolved_embedded_item>`` be ``inside``
the bundle already.  In other words, if you pass plugins to ``fixup_bundle``
as the libs parameter, you should install them or copy them into the
bundle before calling ``fixup_bundle``.  The ``libs`` parameter is a list of
libraries that must be fixed up, but that cannot be determined by
otool output analysis.  (i.e., ``plugins``)

Also, change the id of the item being fixed up to its own
``_EMBEDDED_ITEM`` value.

Accumulate changes in a local variable and make *one* call to
``install_name_tool`` at the end of the function with all the changes at
once.

If the ``BU_CHMOD_BUNDLE_ITEMS`` variable is set then bundle items will be
marked writable before ``install_name_tool`` tries to change them.

.. code-block:: cmake

  verify_bundle_prerequisites(<bundle> <result_var> <info_var>)

Verifies that the sum of all prerequisites of all files inside the
bundle are contained within the bundle or are ``system`` libraries,
presumed to exist everywhere.

.. versionadded:: 3.6
  As an optional parameter (``IGNORE_ITEM``) a list of file names can be passed,
  which are then ignored
  (e.g. ``IGNORE_ITEM "vcredist_x86.exe;vcredist_x64.exe"``)

.. code-block:: cmake

  verify_bundle_symlinks(<bundle> <result_var> <info_var>)

Verifies that any symlinks found in the ``<bundle>`` bundle point to other files
that are already also in the bundle...  Anything that points to an
external file causes this function to fail the verification.
#]=======================================================================]

function(_warn_cmp0080)
  cmake_policy(GET_WARNING CMP0080 _cmp0080_warning)
  message(AUTHOR_WARNING "${_cmp0080_warning}\n")
endfunction()

# Do not include this module at configure time!
if(DEFINED CMAKE_GENERATOR)
  cmake_policy(GET CMP0080 _BundleUtilities_CMP0080)
  if(_BundleUtilities_CMP0080 STREQUAL "NEW")
    message(FATAL_ERROR "BundleUtilities cannot be included at configure time!")
  elseif(NOT _BundleUtilities_CMP0080 STREQUAL "OLD" AND NOT _CMP0080_SUPPRESS_WARNING)
    _warn_cmp0080()
  endif()
endif()

cmake_policy(PUSH)
cmake_policy(SET CMP0057 NEW) # if IN_LIST

# The functions defined in this file depend on the get_prerequisites function
# (and possibly others) found in:
#
include("${CMAKE_CURRENT_LIST_DIR}/GetPrerequisites.cmake")


function(get_bundle_main_executable bundle result_var)
  set(result "error: '${bundle}/Contents/Info.plist' file does not exist")

  if(EXISTS "${bundle}/Contents/Info.plist")
    set(result "error: no CFBundleExecutable in '${bundle}/Contents/Info.plist' file")
    set(line_is_main_executable 0)
    set(bundle_executable "")

    # Read Info.plist as a list of lines:
    #
    set(eol_char "E")
    file(READ "${bundle}/Contents/Info.plist" info_plist)
    string(REPLACE ";" "\\;" info_plist "${info_plist}")
    string(REPLACE "\n" "${eol_char};" info_plist "${info_plist}")
    string(REPLACE "\r" "${eol_char};" info_plist "${info_plist}")

    # Scan the lines for "<key>CFBundleExecutable</key>" - the line after that
    # is the name of the main executable.
    #
    foreach(line ${info_plist})
      if(line_is_main_executable)
        string(REGEX REPLACE "^.*<string>(.*)</string>.*$" "\\1" bundle_executable "${line}")
        break()
      endif()

      if(line MATCHES "<key>CFBundleExecutable</key>")
        set(line_is_main_executable 1)
      endif()
    endforeach()

    if(NOT bundle_executable STREQUAL "")
      if(EXISTS "${bundle}/Contents/MacOS/${bundle_executable}")
        set(result "${bundle}/Contents/MacOS/${bundle_executable}")
      else()

        # Ultimate goal:
        # If not in "Contents/MacOS" then scan the bundle for matching files. If
        # there is only one executable file that matches, then use it, otherwise
        # it's an error...
        #
        #file(GLOB_RECURSE file_list "${bundle}/${bundle_executable}")

        # But for now, pragmatically, it's an error. Expect the main executable
        # for the bundle to be in Contents/MacOS, it's an error if it's not:
        #
        set(result "error: '${bundle}/Contents/MacOS/${bundle_executable}' does not exist")
      endif()
    endif()
  else()
    #
    # More inclusive technique... (This one would work on Windows and Linux
    # too, if a developer followed the typical Mac bundle naming convention...)
    #
    # If there is no Info.plist file, try to find an executable with the same
    # base name as the .app directory:
    #
  endif()

  set(${result_var} "${result}" PARENT_SCOPE)
endfunction()


function(get_dotapp_dir exe dotapp_dir_var)
  set(s "${exe}")

  if(s MATCHES "/.*\\.app/")
    # If there is a ".app" parent directory,
    # ascend until we hit it:
    #   (typical of a Mac bundle executable)
    #
    set(done 0)
    while(NOT ${done})
      get_filename_component(snamewe "${s}" NAME_WE)
      get_filename_component(sname "${s}" NAME)
      get_filename_component(sdir "${s}" PATH)
      set(s "${sdir}")
      if(sname MATCHES "\\.app$")
        set(done 1)
        set(dotapp_dir "${sdir}/${sname}")
      endif()
    endwhile()
  else()
    # Otherwise use a directory containing the exe
    #   (typical of a non-bundle executable on Mac, Windows or Linux)
    #
    is_file_executable("${s}" is_executable)
    if(is_executable)
      get_filename_component(sdir "${s}" PATH)
      set(dotapp_dir "${sdir}")
    else()
      set(dotapp_dir "${s}")
    endif()
  endif()


  set(${dotapp_dir_var} "${dotapp_dir}" PARENT_SCOPE)
endfunction()


function(get_bundle_and_executable app bundle_var executable_var valid_var)
  set(valid 0)

  if(EXISTS "${app}")
    # Is it a directory ending in .app?
    if(IS_DIRECTORY "${app}")
      if(app MATCHES "\\.app$")
        get_bundle_main_executable("${app}" executable)
        if(EXISTS "${app}" AND EXISTS "${executable}")
          set(${bundle_var} "${app}" PARENT_SCOPE)
          set(${executable_var} "${executable}" PARENT_SCOPE)
          set(valid 1)
          #message(STATUS "info: handled .app directory case...")
        else()
          message(STATUS "warning: *NOT* handled - .app directory case...")
        endif()
      else()
        message(STATUS "warning: *NOT* handled - directory but not .app case...")
      endif()
    else()
      # Is it an executable file?
      is_file_executable("${app}" is_executable)
      if(is_executable)
        get_dotapp_dir("${app}" dotapp_dir)
        if(EXISTS "${dotapp_dir}")
          set(${bundle_var} "${dotapp_dir}" PARENT_SCOPE)
          set(${executable_var} "${app}" PARENT_SCOPE)
          set(valid 1)
          #message(STATUS "info: handled executable file in .app dir case...")
        else()
          get_filename_component(app_dir "${app}" PATH)
          set(${bundle_var} "${app_dir}" PARENT_SCOPE)
          set(${executable_var} "${app}" PARENT_SCOPE)
          set(valid 1)
          #message(STATUS "info: handled executable file in any dir case...")
        endif()
      else()
        message(STATUS "warning: *NOT* handled - not .app dir, not executable file...")
      endif()
    endif()
  else()
    message(STATUS "warning: *NOT* handled - directory/file does not exist...")
  endif()

  if(NOT valid)
    set(${bundle_var} "error: not a bundle" PARENT_SCOPE)
    set(${executable_var} "error: not a bundle" PARENT_SCOPE)
  endif()

  set(${valid_var} ${valid} PARENT_SCOPE)
endfunction()


function(get_bundle_all_executables bundle exes_var)
  set(exes "")

  if(UNIX)
    find_program(find_cmd "find")
    mark_as_advanced(find_cmd)
  endif()

  # find command is much quicker than checking every file one by one on Unix
  # which can take long time for large bundles, and since anyway we expect
  # executable to have execute flag set we can narrow the list much quicker.
  if(find_cmd)
    execute_process(COMMAND "${find_cmd}" "${bundle}"
      -type f \( -perm -0100 -o -perm -0010 -o -perm -0001 \)
      OUTPUT_VARIABLE file_list
      OUTPUT_STRIP_TRAILING_WHITESPACE
      )
    string(REPLACE "\n" ";" file_list "${file_list}")
  else()
    file(GLOB_RECURSE file_list "${bundle}/*")
  endif()

  foreach(f ${file_list})
    is_file_executable("${f}" is_executable)
    if(is_executable)
      set(exes ${exes} "${f}")
    endif()
  endforeach()

  set(${exes_var} "${exes}" PARENT_SCOPE)
endfunction()


function(get_item_rpaths item rpaths_var)
  if(APPLE)
    find_program(otool_cmd "otool")
    mark_as_advanced(otool_cmd)
  endif()

  if(otool_cmd)
    execute_process(
      COMMAND "${otool_cmd}" -l "${item}"
      OUTPUT_VARIABLE load_cmds_ov
      RESULT_VARIABLE otool_rv
      ERROR_VARIABLE otool_ev
      )
    if(NOT otool_rv STREQUAL "0")
      message(FATAL_ERROR "otool -l failed: ${otool_rv}\n${otool_ev}")
    endif()
    string(REGEX REPLACE "[^\n]+cmd LC_RPATH\n[^\n]+\n[^\n]+path ([^\n]+) \\(offset[^\n]+\n" "rpath \\1\n" load_cmds_ov "${load_cmds_ov}")
    string(REGEX MATCHALL "rpath [^\n]+" load_cmds_ov "${load_cmds_ov}")
    string(REGEX REPLACE "rpath " "" load_cmds_ov "${load_cmds_ov}")
    if(load_cmds_ov)
      foreach(rpath ${load_cmds_ov})
        gp_append_unique(${rpaths_var} "${rpath}")
      endforeach()
    endif()
  endif()

  if(UNIX AND NOT APPLE)
    file(READ_ELF ${item} RPATH rpath_var RUNPATH runpath_var CAPTURE_ERROR error_var)
    get_filename_component(item_dir ${item} DIRECTORY)
    foreach(rpath ${rpath_var} ${runpath_var})
      # Substitute $ORIGIN with the exepath and add to the found rpaths
      string(REPLACE "$ORIGIN" "${item_dir}" rpath "${rpath}")
      gp_append_unique(${rpaths_var} "${rpath}")
    endforeach()
  endif()

  set(${rpaths_var} ${${rpaths_var}} PARENT_SCOPE)
endfunction()


function(get_item_key item key_var)
  get_filename_component(item_name "${item}" NAME)
  if(WIN32)
    string(TOLOWER "${item_name}" item_name)
  endif()
  string(REPLACE "." "_" ${key_var} "${item_name}")
  set(${key_var} ${${key_var}} PARENT_SCOPE)
endfunction()


function(clear_bundle_keys keys_var)
  foreach(key ${${keys_var}})
    set(${key}_ITEM PARENT_SCOPE)
    set(${key}_RESOLVED_ITEM PARENT_SCOPE)
    set(${key}_DEFAULT_EMBEDDED_PATH PARENT_SCOPE)
    set(${key}_EMBEDDED_ITEM PARENT_SCOPE)
    set(${key}_RESOLVED_EMBEDDED_ITEM PARENT_SCOPE)
    set(${key}_COPYFLAG PARENT_SCOPE)
    set(${key}_RPATHS PARENT_SCOPE)
  endforeach()
  set(${keys_var} PARENT_SCOPE)
endfunction()


function(set_bundle_key_values keys_var context item exepath dirs copyflag)
  if(ARGC GREATER 6)
    set(rpaths "${ARGV6}")
  else()
    set(rpaths "")
  endif()
  get_filename_component(item_name "${item}" NAME)

  get_item_key("${item}" key)

  list(LENGTH ${keys_var} length_before)
  gp_append_unique(${keys_var} "${key}")
  list(LENGTH ${keys_var} length_after)

  if(NOT length_before EQUAL length_after)
    gp_resolve_item("${context}" "${item}" "${exepath}" "${dirs}" resolved_item "${rpaths}")

    gp_item_default_embedded_path("${item}" default_embedded_path)

    get_item_rpaths("${resolved_item}" item_rpaths)

    if((NOT item MATCHES "\\.dylib$") AND (item MATCHES "[^/]+\\.framework/"))
      # For frameworks, construct the name under the embedded path from the
      # opening "${item_name}.framework/" to the closing "/${item_name}":
      #
      string(REGEX REPLACE "^.*(${item_name}.framework/.*/?${item_name}).*$" "${default_embedded_path}/\\1" embedded_item "${item}")
    else()
      # For other items, just use the same name as the original, but in the
      # embedded path:
      #
      set(embedded_item "${default_embedded_path}/${item_name}")
    endif()

    # Replace @executable_path and resolve ".." references:
    #
    string(REPLACE "@executable_path" "${exepath}" resolved_embedded_item "${embedded_item}")
    get_filename_component(resolved_embedded_item "${resolved_embedded_item}" ABSOLUTE)

    # *But* -- if we are not copying, then force resolved_embedded_item to be
    # the same as resolved_item. In the case of multiple executables in the
    # original bundle, using the default_embedded_path results in looking for
    # the resolved executable next to the main bundle executable. This is here
    # so that exes in the other sibling directories (like "bin") get fixed up
    # properly...
    #
    if(NOT copyflag)
      set(resolved_embedded_item "${resolved_item}")
    endif()

    set(${keys_var} ${${keys_var}} PARENT_SCOPE)
    set(${key}_ITEM "${item}" PARENT_SCOPE)
    set(${key}_RESOLVED_ITEM "${resolved_item}" PARENT_SCOPE)
    set(${key}_DEFAULT_EMBEDDED_PATH "${default_embedded_path}" PARENT_SCOPE)
    set(${key}_EMBEDDED_ITEM "${embedded_item}" PARENT_SCOPE)
    set(${key}_RESOLVED_EMBEDDED_ITEM "${resolved_embedded_item}" PARENT_SCOPE)
    set(${key}_COPYFLAG "${copyflag}" PARENT_SCOPE)
    set(${key}_RPATHS "${item_rpaths}" PARENT_SCOPE)
    set(${key}_RDEP_RPATHS "${rpaths}" PARENT_SCOPE)
  else()
    #message("warning: item key '${key}' already in the list, subsequent references assumed identical to first")
  endif()
endfunction()


function(get_bundle_keys app libs dirs keys_var)
  set(${keys_var} PARENT_SCOPE)

  set(options)
  set(oneValueArgs)
  set(multiValueArgs IGNORE_ITEM)
  cmake_parse_arguments(CFG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )

  get_bundle_and_executable("${app}" bundle executable valid)
  if(valid)
    # Always use the exepath of the main bundle executable for @executable_path
    # replacements:
    #
    get_filename_component(exepath "${executable}" PATH)

    # But do fixups on all executables in the bundle:
    #
    get_bundle_all_executables("${bundle}" exes)

    # Set keys for main executable first:
    #
    set_bundle_key_values(${keys_var} "${executable}" "${executable}" "${exepath}" "${dirs}" 0)

    # Get rpaths specified by main executable:
    #
    get_item_key("${executable}" executable_key)
    set(main_rpaths "${${executable_key}_RPATHS}")

    # For each extra lib, accumulate a key as well and then also accumulate
    # any of its prerequisites. (Extra libs are typically dynamically loaded
    # plugins: libraries that are prerequisites for full runtime functionality
    # but that do not show up in otool -L output...)
    #
    foreach(lib ${libs})
      set_bundle_key_values(${keys_var} "${lib}" "${lib}" "${exepath}" "${dirs}" 0 "${main_rpaths}")

      set(prereqs "")
      get_filename_component(prereq_filename ${lib} NAME)

      if(NOT prereq_filename IN_LIST CFG_IGNORE_ITEM)
        get_prerequisites("${lib}" prereqs 1 1 "${exepath}" "${dirs}" "${main_rpaths}")
        foreach(pr ${prereqs})
          set_bundle_key_values(${keys_var} "${lib}" "${pr}" "${exepath}" "${dirs}" 1 "${main_rpaths}")
        endforeach()
      else()
        message(STATUS "Ignoring file: ${prereq_filename}")
      endif()
    endforeach()

    # For each executable found in the bundle, accumulate keys as we go.
    # The list of keys should be complete when all prerequisites of all
    # binaries in the bundle have been analyzed.
    #
    foreach(exe ${exes})
      # Main executable is scanned first above:
      #
      if(NOT exe STREQUAL executable)
        # Add the exe itself to the keys:
        #
        set_bundle_key_values(${keys_var} "${exe}" "${exe}" "${exepath}" "${dirs}" 0 "${main_rpaths}")

        # Get rpaths specified by executable:
        #
        get_item_key("${exe}" exe_key)
        set(exe_rpaths "${main_rpaths}" "${${exe_key}_RPATHS}")
      else()
        set(exe_rpaths "${main_rpaths}")
      endif()

      # Add each prerequisite to the keys:
      #
      set(prereqs "")
      get_filename_component(prereq_filename ${exe} NAME)

      if(NOT prereq_filename IN_LIST CFG_IGNORE_ITEM)
        get_prerequisites("${exe}" prereqs 1 1 "${exepath}" "${dirs}" "${exe_rpaths}")
        foreach(pr ${prereqs})
          set_bundle_key_values(${keys_var} "${exe}" "${pr}" "${exepath}" "${dirs}" 1 "${exe_rpaths}")
        endforeach()
      else()
        message(STATUS "Ignoring file: ${prereq_filename}")
      endif()
    endforeach()

    # preserve library symlink structure
    foreach(key ${${keys_var}})
      if("${${key}_COPYFLAG}" STREQUAL "1")
        if(IS_SYMLINK "${${key}_RESOLVED_ITEM}")
          get_filename_component(target "${${key}_RESOLVED_ITEM}" REALPATH)
          set_bundle_key_values(${keys_var} "${exe}" "${target}" "${exepath}" "${dirs}" 1 "${exe_rpaths}")
          get_item_key("${target}" targetkey)

          if(WIN32)
            # ignore case on Windows
            string(TOLOWER "${${key}_RESOLVED_ITEM}" resolved_item_compare)
            string(TOLOWER "${${targetkey}_RESOLVED_EMBEDDED_ITEM}" resolved_embedded_item_compare)
          else()
            set(resolved_item_compare "${${key}_RESOLVED_ITEM}")
            set(resolved_embedded_item_compare "${${targetkey}_RESOLVED_EMBEDDED_ITEM}")
          endif()
          get_filename_component(resolved_item_compare "${resolved_item_compare}" NAME)
          get_filename_component(resolved_embedded_item_compare "${resolved_embedded_item_compare}" NAME)

          if(NOT resolved_item_compare STREQUAL resolved_embedded_item_compare)
            set(${key}_COPYFLAG "2")
            set(${key}_RESOLVED_ITEM "${${targetkey}_RESOLVED_EMBEDDED_ITEM}")
          endif()

        endif()
      endif()
    endforeach()
    # Propagate values to caller's scope:
    #
    set(${keys_var} ${${keys_var}} PARENT_SCOPE)
    foreach(key ${${keys_var}})
      set(${key}_ITEM "${${key}_ITEM}" PARENT_SCOPE)
      set(${key}_RESOLVED_ITEM "${${key}_RESOLVED_ITEM}" PARENT_SCOPE)
      set(${key}_DEFAULT_EMBEDDED_PATH "${${key}_DEFAULT_EMBEDDED_PATH}" PARENT_SCOPE)
      set(${key}_EMBEDDED_ITEM "${${key}_EMBEDDED_ITEM}" PARENT_SCOPE)
      set(${key}_RESOLVED_EMBEDDED_ITEM "${${key}_RESOLVED_EMBEDDED_ITEM}" PARENT_SCOPE)
      set(${key}_COPYFLAG "${${key}_COPYFLAG}" PARENT_SCOPE)
      set(${key}_RPATHS "${${key}_RPATHS}" PARENT_SCOPE)
      set(${key}_RDEP_RPATHS "${${key}_RDEP_RPATHS}" PARENT_SCOPE)
    endforeach()
  endif()
endfunction()

function(link_resolved_item_into_bundle resolved_item resolved_embedded_item)
  if(WIN32)
    # ignore case on Windows
    string(TOLOWER "${resolved_item}" resolved_item_compare)
    string(TOLOWER "${resolved_embedded_item}" resolved_embedded_item_compare)
  else()
    set(resolved_item_compare "${resolved_item}")
    set(resolved_embedded_item_compare "${resolved_embedded_item}")
  endif()

  if(resolved_item_compare STREQUAL resolved_embedded_item_compare)
    message(STATUS "warning: resolved_item == resolved_embedded_item - not linking...")
  else()
    get_filename_component(target_dir "${resolved_embedded_item}" DIRECTORY)
    file(RELATIVE_PATH symlink_target "${target_dir}" "${resolved_item}")
    if (NOT EXISTS "${target_dir}")
      file(MAKE_DIRECTORY "${target_dir}")
    endif()
    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${symlink_target}" "${resolved_embedded_item}")
  endif()
endfunction()

function(copy_resolved_item_into_bundle resolved_item resolved_embedded_item)
  if(WIN32)
    # ignore case on Windows
    string(TOLOWER "${resolved_item}" resolved_item_compare)
    string(TOLOWER "${resolved_embedded_item}" resolved_embedded_item_compare)
  else()
    set(resolved_item_compare "${resolved_item}")
    set(resolved_embedded_item_compare "${resolved_embedded_item}")
  endif()

  if(resolved_item_compare STREQUAL resolved_embedded_item_compare)
    message(STATUS "warning: resolved_item == resolved_embedded_item - not copying...")
  else()
    #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy ${resolved_item} ${resolved_embedded_item}")
    execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${resolved_item}" "${resolved_embedded_item}")
    if(UNIX AND NOT APPLE)
      file(RPATH_REMOVE FILE "${resolved_embedded_item}")
    endif()
  endif()

endfunction()


function(copy_resolved_framework_into_bundle resolved_item resolved_embedded_item)
  if(WIN32)
    # ignore case on Windows
    string(TOLOWER "${resolved_item}" resolved_item_compare)
    string(TOLOWER "${resolved_embedded_item}" resolved_embedded_item_compare)
  else()
    set(resolved_item_compare "${resolved_item}")
    set(resolved_embedded_item_compare "${resolved_embedded_item}")
  endif()

  if(resolved_item_compare STREQUAL resolved_embedded_item_compare)
    message(STATUS "warning: resolved_item == resolved_embedded_item - not copying...")
  else()
    if(BU_COPY_FULL_FRAMEWORK_CONTENTS)
      # Full Framework (everything):
      get_filename_component(resolved_dir "${resolved_item}" PATH)
      get_filename_component(resolved_dir "${resolved_dir}/../.." ABSOLUTE)
      get_filename_component(resolved_embedded_dir "${resolved_embedded_item}" PATH)
      get_filename_component(resolved_embedded_dir "${resolved_embedded_dir}/../.." ABSOLUTE)
      #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy_directory '${resolved_dir}' '${resolved_embedded_dir}'")
      execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${resolved_dir}" "${resolved_embedded_dir}")
    else()
      # Framework lib itself:
      #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy ${resolved_item} ${resolved_embedded_item}")
      execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${resolved_item}" "${resolved_embedded_item}")

      # Plus Resources, if they exist:
      string(REGEX REPLACE "^(.*)/[^/]+$" "\\1/Resources" resolved_resources "${resolved_item}")
      string(REGEX REPLACE "^(.*)/[^/]+$" "\\1/Resources" resolved_embedded_resources "${resolved_embedded_item}")
      if(EXISTS "${resolved_resources}")
        #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy_directory '${resolved_resources}' '${resolved_embedded_resources}'")
        execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${resolved_resources}" "${resolved_embedded_resources}")
      endif()

      # Some frameworks e.g. Qt put Info.plist in wrong place, so when it is
      # missing in resources, copy it from other well known incorrect locations:
      if(NOT EXISTS "${resolved_resources}/Info.plist")
        # Check for Contents/Info.plist in framework root (older Qt SDK):
        string(REGEX REPLACE "^(.*)/[^/]+/[^/]+/[^/]+$" "\\1/Contents/Info.plist" resolved_info_plist "${resolved_item}")
        string(REGEX REPLACE "^(.*)/[^/]+$" "\\1/Resources/Info.plist" resolved_embedded_info_plist "${resolved_embedded_item}")
        if(EXISTS "${resolved_info_plist}")
          #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy_directory '${resolved_info_plist}' '${resolved_embedded_info_plist}'")
          execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${resolved_info_plist}" "${resolved_embedded_info_plist}")
        endif()
      endif()

      # Check if framework is versioned and fix it layout
      string(REGEX REPLACE "^.*/([^/]+)/[^/]+$" "\\1" resolved_embedded_version "${resolved_embedded_item}")
      string(REGEX REPLACE "^(.*)/[^/]+/[^/]+$" "\\1" resolved_embedded_versions "${resolved_embedded_item}")
      string(REGEX REPLACE "^.*/([^/]+)/[^/]+/[^/]+$" "\\1" resolved_embedded_versions_basename "${resolved_embedded_item}")
      if(resolved_embedded_versions_basename STREQUAL "Versions")
        # Ensure Current symlink points to the framework version
        if(NOT EXISTS "${resolved_embedded_versions}/Current")
          execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${resolved_embedded_version}" "${resolved_embedded_versions}/Current")
        endif()
        # Restore symlinks in framework root pointing to current framework
        # binary and resources:
        string(REGEX REPLACE "^(.*)/[^/]+/[^/]+/[^/]+$" "\\1" resolved_embedded_root "${resolved_embedded_item}")
        string(REGEX REPLACE "^.*/([^/]+)$" "\\1" resolved_embedded_item_basename "${resolved_embedded_item}")
        if(NOT EXISTS "${resolved_embedded_root}/${resolved_embedded_item_basename}")
          execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "Versions/Current/${resolved_embedded_item_basename}" "${resolved_embedded_root}/${resolved_embedded_item_basename}")
        endif()
        if(NOT EXISTS "${resolved_embedded_root}/Resources")
          execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "Versions/Current/Resources" "${resolved_embedded_root}/Resources")
        endif()
      endif()
    endif()
    if(UNIX AND NOT APPLE)
      file(RPATH_REMOVE FILE "${resolved_embedded_item}")
    endif()
  endif()

endfunction()


function(fixup_bundle_item resolved_embedded_item exepath dirs)
  # This item's key is "ikey":
  #
  get_item_key("${resolved_embedded_item}" ikey)

  # Ensure the item is "inside the .app bundle" -- it should not be fixed up if
  # it is not in the .app bundle... Otherwise, we'll modify files in the build
  # tree, or in other varied locations around the file system, with our call to
  # install_name_tool. Make sure that doesn't happen here:
  #
  get_dotapp_dir("${exepath}" exe_dotapp_dir)
  string(LENGTH "${exe_dotapp_dir}/" exe_dotapp_dir_length)
  string(LENGTH "${resolved_embedded_item}" resolved_embedded_item_length)
  set(path_too_short 0)
  set(is_embedded 0)
  if(resolved_embedded_item_length LESS exe_dotapp_dir_length)
    set(path_too_short 1)
  endif()
  if(NOT path_too_short)
    string(SUBSTRING "${resolved_embedded_item}" 0 ${exe_dotapp_dir_length} item_substring)
    if("${exe_dotapp_dir}/" STREQUAL item_substring)
      set(is_embedded 1)
    endif()
  endif()
  if(NOT is_embedded)
    message("  exe_dotapp_dir/='${exe_dotapp_dir}/'")
    message("  item_substring='${item_substring}'")
    message("  resolved_embedded_item='${resolved_embedded_item}'")
    message("")
    message("Install or copy the item into the bundle before calling fixup_bundle.")
    message("Or maybe there's a typo or incorrect path in one of the args to fixup_bundle?")
    message("")
    message(FATAL_ERROR "cannot fixup an item that is not in the bundle...")
  endif()

  set(rpaths "${${ikey}_RPATHS}" "${${ikey}_RDEP_RPATHS}")

  set(prereqs "")
  get_prerequisites("${resolved_embedded_item}" prereqs 1 0 "${exepath}" "${dirs}" "${rpaths}")

  set(changes "")

  foreach(pr ${prereqs})
    # Each referenced item's key is "rkey" in the loop:
    #
    get_item_key("${pr}" rkey)

    if(NOT "${${rkey}_EMBEDDED_ITEM}" STREQUAL "")
      set(changes ${changes} "-change" "${pr}" "${${rkey}_EMBEDDED_ITEM}")
    else()
      message("warning: unexpected reference to '${pr}'")
    endif()
  endforeach()

  if(BU_CHMOD_BUNDLE_ITEMS)
    execute_process(COMMAND chmod u+w "${resolved_embedded_item}")
  endif()

  # CMAKE_INSTALL_NAME_TOOL may not be set if executed in script mode
  # Duplicated from CMakeFindBinUtils.cmake
  find_program(CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool HINTS ${_CMAKE_TOOLCHAIN_LOCATION})

  # Only if install_name_tool supports -delete_rpath:
  #
  execute_process(COMMAND ${CMAKE_INSTALL_NAME_TOOL}
    OUTPUT_VARIABLE install_name_tool_usage
    ERROR_VARIABLE  install_name_tool_usage
    )
  if(install_name_tool_usage MATCHES ".*-delete_rpath.*")
    foreach(rpath ${${ikey}_RPATHS})
      set(changes ${changes} -delete_rpath "${rpath}")
    endforeach()
  endif()

  if(${ikey}_EMBEDDED_ITEM)
    set(changes ${changes} -id "${${ikey}_EMBEDDED_ITEM}")
  endif()

  # Change this item's id and all of its references in one call
  # to install_name_tool:
  #
  if(changes)
    # Check for a script by extension (.bat,.sh,...) or if the file starts with "#!" (shebang)
    file(READ ${resolved_embedded_item} file_contents LIMIT 5)
    if(NOT "${resolved_embedded_item}" MATCHES "\\.(bat|c?sh|bash|ksh|cmd)$" AND
       NOT file_contents MATCHES "^#!")
      set(cmd ${CMAKE_INSTALL_NAME_TOOL} ${changes} "${resolved_embedded_item}")
      execute_process(COMMAND ${cmd} RESULT_VARIABLE install_name_tool_result)
      if(NOT install_name_tool_result EQUAL 0)
        string(REPLACE ";" "' '" msg "'${cmd}'")
        message(FATAL_ERROR "Command failed:\n ${msg}")
      endif()
    endif()
  endif()
endfunction()


function(fixup_bundle app libs dirs)
  message(STATUS "fixup_bundle")
  message(STATUS "  app='${app}'")
  message(STATUS "  libs='${libs}'")
  message(STATUS "  dirs='${dirs}'")

  set(options)
  set(oneValueArgs)
  set(multiValueArgs IGNORE_ITEM)
  cmake_parse_arguments(CFG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )

  message(STATUS "  ignoreItems='${CFG_IGNORE_ITEM}'")

  get_bundle_and_executable("${app}" bundle executable valid)
  if(valid)
    get_filename_component(exepath "${executable}" PATH)

    message(STATUS "fixup_bundle: preparing...")
    get_bundle_keys("${app}" "${libs}" "${dirs}" keys IGNORE_ITEM "${CFG_IGNORE_ITEM}")

    message(STATUS "fixup_bundle: copying...")
    list(LENGTH keys n)
    math(EXPR n ${n}*2)

    set(i 0)
    foreach(key ${keys})
      math(EXPR i ${i}+1)
      if("${${key}_COPYFLAG}" STREQUAL "2")
        message(STATUS "${i}/${n}: linking '${${key}_RESOLVED_ITEM}' -> '${${key}_RESOLVED_EMBEDDED_ITEM}'")
      elseif(${${key}_COPYFLAG})
        message(STATUS "${i}/${n}: copying '${${key}_RESOLVED_ITEM}'")
      else()
        message(STATUS "${i}/${n}: *NOT* copying '${${key}_RESOLVED_ITEM}'")
      endif()

      set(show_status 0)
      if(show_status)
        message(STATUS "key='${key}'")
        message(STATUS "item='${${key}_ITEM}'")
        message(STATUS "resolved_item='${${key}_RESOLVED_ITEM}'")
        message(STATUS "default_embedded_path='${${key}_DEFAULT_EMBEDDED_PATH}'")
        message(STATUS "embedded_item='${${key}_EMBEDDED_ITEM}'")
        message(STATUS "resolved_embedded_item='${${key}_RESOLVED_EMBEDDED_ITEM}'")
        message(STATUS "copyflag='${${key}_COPYFLAG}'")
        message(STATUS "")
      endif()

      if("${${key}_COPYFLAG}" STREQUAL "2")
        link_resolved_item_into_bundle("${${key}_RESOLVED_ITEM}"
          "${${key}_RESOLVED_EMBEDDED_ITEM}")
      elseif(${${key}_COPYFLAG})
        set(item "${${key}_ITEM}")
        if(item MATCHES "[^/]+\\.framework/")
          copy_resolved_framework_into_bundle("${${key}_RESOLVED_ITEM}"
            "${${key}_RESOLVED_EMBEDDED_ITEM}")
        else()
          copy_resolved_item_into_bundle("${${key}_RESOLVED_ITEM}"
            "${${key}_RESOLVED_EMBEDDED_ITEM}")
        endif()
      endif()
    endforeach()

    message(STATUS "fixup_bundle: fixing...")
    foreach(key ${keys})
      math(EXPR i ${i}+1)
      if(APPLE)
        message(STATUS "${i}/${n}: fixing up '${${key}_RESOLVED_EMBEDDED_ITEM}'")
        if(NOT "${${key}_COPYFLAG}" STREQUAL "2")
          fixup_bundle_item("${${key}_RESOLVED_EMBEDDED_ITEM}" "${exepath}" "${dirs}")
        endif()
      else()
        message(STATUS "${i}/${n}: fix-up not required on this platform '${${key}_RESOLVED_EMBEDDED_ITEM}'")
      endif()
    endforeach()

    message(STATUS "fixup_bundle: cleaning up...")
    clear_bundle_keys(keys)

    message(STATUS "fixup_bundle: verifying...")
    verify_app("${app}" IGNORE_ITEM "${CFG_IGNORE_ITEM}")
  else()
    message(SEND_ERROR "error: fixup_bundle: not a valid bundle")
  endif()

  message(STATUS "fixup_bundle: done")
endfunction()


function(copy_and_fixup_bundle src dst libs dirs)
  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${src}" "${dst}")
  fixup_bundle("${dst}" "${libs}" "${dirs}")
endfunction()


function(verify_bundle_prerequisites bundle result_var info_var)
  set(result 1)
  set(info "")
  set(count 0)

  set(options)
  set(oneValueArgs)
  set(multiValueArgs IGNORE_ITEM)
  cmake_parse_arguments(CFG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )

  get_bundle_main_executable("${bundle}" main_bundle_exe)

  get_bundle_all_executables("${bundle}" file_list)
  foreach(f ${file_list})
      get_filename_component(exepath "${f}" PATH)
      math(EXPR count "${count} + 1")

      message(STATUS "executable file ${count}: ${f}")

      set(prereqs "")
      get_filename_component(prereq_filename ${f} NAME)

      if(NOT prereq_filename IN_LIST CFG_IGNORE_ITEM)
        get_item_rpaths(${f} _main_exe_rpaths)
        get_prerequisites("${f}" prereqs 1 1 "${exepath}" "${_main_exe_rpaths}")

        # On the Mac,
        # "embedded" and "system" prerequisites are fine... anything else means
        # the bundle's prerequisites are not verified (i.e., the bundle is not
        # really "standalone")
        #
        # On Windows (and others? Linux/Unix/...?)
        # "local" and "system" prereqs are fine...
        #

        set(external_prereqs "")

        foreach(p ${prereqs})
          set(p_type "")
          gp_file_type("${f}" "${p}" p_type)

          if(APPLE)
            if(NOT p_type STREQUAL "embedded" AND NOT p_type STREQUAL "system")
              set(external_prereqs ${external_prereqs} "${p}")
            endif()
          else()
            if(NOT p_type STREQUAL "local" AND NOT p_type STREQUAL "system")
              set(external_prereqs ${external_prereqs} "${p}")
            endif()
          endif()
        endforeach()

        if(external_prereqs)
          # Found non-system/somehow-unacceptable prerequisites:
          set(result 0)
          set(info ${info} "external prerequisites found:\nf='${f}'\nexternal_prereqs='${external_prereqs}'\n")
        endif()
      else()
        message(STATUS "Ignoring file: ${prereq_filename}")
      endif()
  endforeach()

  if(result)
    set(info "Verified ${count} executable files in '${bundle}'")
  endif()

  set(${result_var} "${result}" PARENT_SCOPE)
  set(${info_var} "${info}" PARENT_SCOPE)
endfunction()


function(verify_bundle_symlinks bundle result_var info_var)
  set(result 1)
  set(info "")
  set(count 0)

  # TODO: implement this function for real...
  # Right now, it is just a stub that verifies unconditionally...

  set(${result_var} "${result}" PARENT_SCOPE)
  set(${info_var} "${info}" PARENT_SCOPE)
endfunction()


function(verify_app app)
  set(verified 0)
  set(info "")

  set(options)
  set(oneValueArgs)
  set(multiValueArgs IGNORE_ITEM)
  cmake_parse_arguments(CFG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )

  get_bundle_and_executable("${app}" bundle executable valid)

  message(STATUS "===========================================================================")
  message(STATUS "Analyzing app='${app}'")
  message(STATUS "bundle='${bundle}'")
  message(STATUS "executable='${executable}'")
  message(STATUS "valid='${valid}'")

  # Verify that the bundle does not have any "external" prerequisites:
  #
  verify_bundle_prerequisites("${bundle}" verified info IGNORE_ITEM "${CFG_IGNORE_ITEM}")
  message(STATUS "verified='${verified}'")
  message(STATUS "info='${info}'")
  message(STATUS "")

  if(verified)
    # Verify that the bundle does not have any symlinks to external files:
    #
    verify_bundle_symlinks("${bundle}" verified info)
    message(STATUS "verified='${verified}'")
    message(STATUS "info='${info}'")
    message(STATUS "")
  endif()

  if(NOT verified)
    message(FATAL_ERROR "error: verify_app failed")
  endif()
endfunction()

cmake_policy(POP)