summaryrefslogtreecommitdiff
path: root/Source/cmakemain.cxx
blob: 11a4267536fbcf07f34401ac94396f1a0f0b19b9 (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
/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  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.
============================================================================*/
// include these first, otherwise there will be problems on Windows
// with GetCurrentDirectory() being redefined
#ifdef CMAKE_BUILD_WITH_CMAKE
#include "cmDynamicLoader.h"
#include "cmDocumentation.h"
#endif

#include "cmake.h"
#include "cmCacheManager.h"
#include "cmListFileCache.h"
#include "cmakewizard.h"
#include "cmSourceFile.h"
#include "cmGlobalGenerator.h"
#include "cmLocalGenerator.h"
#include "cmMakefile.h"

#ifdef CMAKE_BUILD_WITH_CMAKE
//----------------------------------------------------------------------------
static const char * cmDocumentationName[][3] =
{
  {0,
   "  cmake - Cross-Platform Makefile Generator.", 0},
  {0,0,0}
};

//----------------------------------------------------------------------------
static const char * cmDocumentationUsage[][3] =
{
  {0,
   "  cmake [options] <path-to-source>\n"
   "  cmake [options] <path-to-existing-build>", 0},
  {0,0,0}
};

//----------------------------------------------------------------------------
static const char * cmDocumentationDescription[][3] =
{
  {0,
   "The \"cmake\" executable is the CMake command-line interface.  It may "
   "be used to configure projects in scripts.  Project configuration "
   "settings "
   "may be specified on the command line with the -D option.  The -i option "
   "will cause cmake to interactively prompt for such settings.", 0},
  CMAKE_STANDARD_INTRODUCTION,
  {0,0,0}
};

#define CMAKE_BUILD_OPTIONS                                             \
  "  <dir>          = Project binary directory to be built.\n"          \
  "  --target <tgt> = Build <tgt> instead of default targets.\n"        \
  "  --config <cfg> = For multi-configuration tools, choose <cfg>.\n"   \
  "  --clean-first  = Build target 'clean' first, then build.\n"        \
  "                   (To clean only, use --target 'clean'.)\n"         \
  "  --use-stderr  =  Don't merge stdout/stderr.\n"                     \
  "  --             = Pass remaining options to the native tool.\n"

//----------------------------------------------------------------------------
static const char * cmDocumentationOptions[][3] =
{
  CMAKE_STANDARD_OPTIONS_TABLE,
  {"-E", "CMake command mode.",
   "For true platform independence, CMake provides a list of commands "
   "that can be used on all systems. Run with -E help for the usage "
   "information. Commands available are: chdir, compare_files, copy, "
   "copy_directory, copy_if_different, echo, echo_append, environment, "
   "make_directory, md5sum, remove, remove_directory, rename, tar, time, "
   "touch, touch_nocreate. In addition, some platform specific commands "
   "are available. "
   "On Windows: comspec, delete_regv, write_regv. "
   "On UNIX: create_symlink."},
  {"-i", "Run in wizard mode.",
   "Wizard mode runs cmake interactively without a GUI.  The user is "
   "prompted to answer questions about the project configuration.  "
   "The answers are used to set cmake cache values."},
  {"-L[A][H]", "List non-advanced cached variables.",
   "List cache variables will run CMake and list all the variables from the "
   "CMake cache that are not marked as INTERNAL or ADVANCED. This will "
   "effectively display current CMake settings, which can be then changed "
   "with -D option. Changing some of the variable may result in more "
   "variables being created. If A is specified, then it will display also "
   "advanced variables. If H is specified, it will also display help for "
   "each variable."},
  {"--build <dir>", "Build a CMake-generated project binary tree.",
   "This abstracts a native build tool's command-line interface with the "
   "following options:\n"
   CMAKE_BUILD_OPTIONS
   "Run cmake --build with no options for quick help."},
  {"-N", "View mode only.",
   "Only load the cache. Do not actually run configure and generate steps."},
  {"-P <file>", "Process script mode.",
   "Process the given cmake file as a script written in the CMake language.  "
   "No configure or generate step is performed and the cache is not"
   " modified. If variables are defined using -D, this must be done "
   "before the -P argument."},
  {"--find-package", "Run in pkg-config like mode.",
   "Search a package using find_package() and print the resulting flags "
   "to stdout. This can be used to use cmake instead of pkg-config to find "
   "installed libraries in plain Makefile-based projects or in "
   "autoconf-based projects (via share/aclocal/cmake.m4)."},
  {"--graphviz=[file]", "Generate graphviz of dependencies.",
   "Generate a graphviz input file that will contain all the library and "
   "executable dependencies in the project."},
  {"--system-information [file]", "Dump information about this system.",
   "Dump a wide range of information about the current system. If run "
   "from the top of a binary tree for a CMake project it will dump "
   "additional information such as the cache, log files etc."},
  {"--debug-trycompile", "Do not delete the try_compile build tree. Only "
   "useful on one try_compile at a time.",
   "Do not delete the files and directories created for try_compile calls. "
   "This is useful in debugging failed try_compiles. It may however "
   "change the results of the try-compiles as old junk from a previous "
   "try-compile may cause a different test to either pass or fail "
   "incorrectly.  This option is best used for one try-compile at a time, "
   "and only when debugging." },
  {"--debug-output", "Put cmake in a debug mode.",
   "Print extra stuff during the cmake run like stack traces with "
   "message(send_error ) calls."},
  {"--trace", "Put cmake in trace mode.",
   "Print a trace of all calls made and from where with "
   "message(send_error ) calls."},
  {"--warn-uninitialized", "Warn about uninitialized values.",
   "Print a warning when an uninitialized variable is used."},
  {"--warn-unused-vars", "Warn about unused variables.",
   "Find variables that are declared or set, but not used."},
  {"--no-warn-unused-cli", "Don't warn about command line options.",
   "Don't find variables that are declared on the command line, but not "
   "used."},
  {"--check-system-vars", "Find problems with variable usage in system "
   "files.", "Normally, unused and uninitialized variables are searched for "
   "only in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. This flag tells CMake to "
   "warn about other files as well."},
  {"--help-command cmd [file]", "Print help for a single command and exit.",
   "Full documentation specific to the given command is displayed. "
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-command-list [file]", "List available listfile commands and exit.",
   "The list contains all commands for which help may be obtained by using "
   "the --help-command argument followed by a command name. "
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-commands [file]", "Print help for all commands and exit.",
   "Full documentation specific for all current command is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-compatcommands [file]", "Print help for compatibility commands. ",
   "Full documentation specific for all compatibility commands is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-module module [file]", "Print help for a single module and exit.",
   "Full documentation specific to the given module is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-module-list [file]", "List available modules and exit.",
   "The list contains all modules for which help may be obtained by using "
   "the --help-module argument followed by a module name. "
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-modules [file]", "Print help for all modules and exit.",
   "Full documentation for all modules is displayed. "
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-custom-modules [file]" , "Print help for all custom modules and "
   "exit.",
   "Full documentation for all custom modules is displayed. "
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-policy cmp [file]",
   "Print help for a single policy and exit.",
   "Full documentation specific to the given policy is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-policies [file]", "Print help for all policies and exit.",
   "Full documentation for all policies is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-property prop [file]",
   "Print help for a single property and exit.",
   "Full documentation specific to the given property is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-property-list [file]", "List available properties and exit.",
   "The list contains all properties for which help may be obtained by using "
   "the --help-property argument followed by a property name.  If a file is "
   "specified, the help is written into it."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-properties [file]", "Print help for all properties and exit.",
   "Full documentation for all properties is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-variable var [file]",
   "Print help for a single variable and exit.",
   "Full documentation specific to the given variable is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-variable-list [file]", "List documented variables and exit.",
   "The list contains all variables for which help may be obtained by using "
   "the --help-variable argument followed by a variable name.  If a file is "
   "specified, the help is written into it."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {"--help-variables [file]", "Print help for all variables and exit.",
   "Full documentation for all variables is displayed."
   "If a file is specified, the documentation is written into and the output "
   "format is determined depending on the filename suffix. Supported are man "
   "page, HTML, DocBook and plain text."},
  {0,0,0}
};

//----------------------------------------------------------------------------
static const char * cmDocumentationSeeAlso[][3] =
{
  {0, "ccmake", 0},
  {0, "cpack", 0},
  {0, "ctest", 0},
  {0, "cmakecommands", 0},
  {0, "cmakecompat", 0},
  {0, "cmakemodules", 0},
  {0, "cmakeprops", 0},
  {0, "cmakevars", 0},
  {0, 0, 0}
};

//----------------------------------------------------------------------------
static const char * cmDocumentationNOTE[][3] =
{
  {0,
   "CMake no longer configures a project when run with no arguments.  "
   "In order to configure the project in the current directory, run\n"
   "  cmake .", 0},
  {0,0,0}
};
#endif

int do_cmake(int ac, char** av);
static int do_build(int ac, char** av);

static cmMakefile* cmakemainGetMakefile(void *clientdata)
{
  cmake* cm = (cmake *)clientdata;
  if(cm && cm->GetDebugOutput())
    {
    cmGlobalGenerator* gg=cm->GetGlobalGenerator();
    if (gg)
      {
      cmLocalGenerator* lg=gg->GetCurrentLocalGenerator();
      if (lg)
        {
        cmMakefile* mf = lg->GetMakefile();
        return mf;
        }
      }
    }
  return 0;
}

static std::string cmakemainGetStack(void *clientdata)
{
  std::string msg;
  cmMakefile* mf=cmakemainGetMakefile(clientdata);
  if (mf)
    {
    msg = mf->GetListFileStack();
    if (!msg.empty())
      {
      msg = "\n   Called from: " + msg;
      }
    }

  return msg;
}

static void cmakemainErrorCallback(const char* m, const char*, bool&,
                                   void *clientdata)
{
  std::cerr << m << cmakemainGetStack(clientdata) << std::endl << std::flush;
}

static void cmakemainProgressCallback(const char *m, float prog,
                                      void* clientdata)
{
  cmMakefile* mf = cmakemainGetMakefile(clientdata);
  std::string dir;
  if ((mf) && (strstr(m, "Configuring")==m) && (prog<0))
    {
    dir = " ";
    dir += mf->GetCurrentDirectory();
    }
  else if ((mf) && (strstr(m, "Generating")==m))
    {
    dir = " ";
    dir += mf->GetCurrentOutputDirectory();
    }

  if ((prog < 0) || (!dir.empty()))
    {
    std::cout << "-- " << m << dir << cmakemainGetStack(clientdata)<<std::endl;
    }

  std::cout.flush();
}


int main(int ac, char** av)
{
  cmSystemTools::EnableMSVCDebugHook();
  cmSystemTools::FindExecutableDirectory(av[0]);
  if(ac > 1 && strcmp(av[1], "--build") == 0)
    {
    return do_build(ac, av);
    }
  int ret = do_cmake(ac, av);
#ifdef CMAKE_BUILD_WITH_CMAKE
  cmDynamicLoader::FlushCache();
#endif
  return ret;
}

int do_cmake(int ac, char** av)
{
  int nocwd = 0;

  if ( cmSystemTools::GetCurrentWorkingDirectory().size() == 0 )
    {
    std::cerr << "Current working directory cannot be established."
              << std::endl;
    nocwd = 1;
    }

#ifdef CMAKE_BUILD_WITH_CMAKE
  cmDocumentation doc;
  doc.addCMakeStandardDocSections();
  if(doc.CheckOptions(ac, av, "-E") || nocwd)
    {
    // Construct and print requested documentation.
    cmake hcm;
    hcm.AddCMakePaths();
    doc.SetCMakeRoot(hcm.GetCacheDefinition("CMAKE_ROOT"));

    // the command line args are processed here so that you can do
    // -DCMAKE_MODULE_PATH=/some/path and have this value accessible here
    std::vector<std::string> args;
    for(int i =0; i < ac; ++i)
      {
      args.push_back(av[i]);
      }
    hcm.SetCacheArgs(args);
    const char* modulePath = hcm.GetCacheDefinition("CMAKE_MODULE_PATH");
    if (modulePath)
      {
      doc.SetCMakeModulePath(modulePath);
      }

    std::vector<cmDocumentationEntry> commands;
    std::vector<cmDocumentationEntry> policies;
    std::vector<cmDocumentationEntry> compatCommands;
    std::vector<cmDocumentationEntry> generators;
    std::map<std::string,cmDocumentationSection *> propDocs;

    hcm.GetPolicyDocumentation(policies);
    hcm.GetCommandDocumentation(commands, true, false);
    hcm.GetCommandDocumentation(compatCommands, false, true);
    hcm.GetPropertiesDocumentation(propDocs);
    hcm.GetGeneratorDocumentation(generators);

    doc.SetName("cmake");
    doc.SetSection("Name",cmDocumentationName);
    doc.SetSection("Usage",cmDocumentationUsage);
    doc.SetSection("Description",cmDocumentationDescription);
    doc.AppendSection("Generators",generators);
    doc.PrependSection("Options",cmDocumentationOptions);
    doc.SetSection("Commands",commands);
    doc.SetSection("Policies",policies);
    doc.AppendSection("Compatibility Commands",compatCommands);
    doc.SetSections(propDocs);

    cmDocumentationEntry e;
    e.Brief =
      "variables defined by cmake, that give information about the project, "
      "and cmake";
    doc.PrependSection("Variables that Provide Information",e);

    doc.SetSeeAlsoList(cmDocumentationSeeAlso);
    int result = doc.PrintRequestedDocumentation(std::cout)? 0:1;

    // If we were run with no arguments, but a CMakeLists.txt file
    // exists, the user may have been trying to use the old behavior
    // of cmake to build a project in-source.  Print a message
    // explaining the change to standard error and return an error
    // condition in case the program is running from a script.
    if((ac == 1) && cmSystemTools::FileExists("CMakeLists.txt"))
      {
      doc.ClearSections();
      doc.SetSection("NOTE", cmDocumentationNOTE);
      doc.Print(cmDocumentation::UsageForm, 0, std::cerr);
      return 1;
      }
    return result;
    }
#else
  if ( nocwd || ac == 1 )
    {
    std::cout <<
      "Bootstrap CMake should not be used outside CMake build process."
              << std::endl;
    return 0;
    }
#endif

  bool wiz = false;
  bool sysinfo = false;
  bool command = false;
  bool list_cached = false;
  bool list_all_cached = false;
  bool list_help = false;
  bool view_only = false;
  cmake::WorkingMode workingMode = cmake::NORMAL_MODE;
  std::vector<std::string> args;
  for(int i =0; i < ac; ++i)
    {
    if(!command && strcmp(av[i], "-i") == 0)
      {
      wiz = true;
      }
    else if(!command && strcmp(av[i], "--system-information") == 0)
      {
      sysinfo = true;
      }
    // if command has already been set, then
    // do not eat the -E
    else if (!command && strcmp(av[i], "-E") == 0)
      {
      command = true;
      }
    else if (!command && strcmp(av[i], "-N") == 0)
      {
      view_only = true;
      }
    else if (!command && strcmp(av[i], "-L") == 0)
      {
      list_cached = true;
      }
    else if (!command && strcmp(av[i], "-LA") == 0)
      {
      list_all_cached = true;
      }
    else if (!command && strcmp(av[i], "-LH") == 0)
      {
      list_cached = true;
      list_help = true;
      }
    else if (!command && strcmp(av[i], "-LAH") == 0)
      {
      list_all_cached = true;
      list_help = true;
      }
    else if (!command && strncmp(av[i], "-P", strlen("-P")) == 0)
      {
      if ( i == ac -1 )
        {
        cmSystemTools::Error("No script specified for argument -P");
        }
      else
        {
        workingMode = cmake::SCRIPT_MODE;
        args.push_back(av[i]);
        i++;
        args.push_back(av[i]);
        }
      }
    else if (!command && strncmp(av[i], "--find-package",
                                 strlen("--find-package")) == 0)
      {
      workingMode = cmake::FIND_PACKAGE_MODE;
      args.push_back(av[i]);
      }
    else
      {
      args.push_back(av[i]);
      }
    }
  if(command)
    {
    int ret = cmake::ExecuteCMakeCommand(args);
    return ret;
    }
  if (wiz)
    {
    cmakewizard wizard;
    return wizard.RunWizard(args);
    }
  if (sysinfo)
    {
    cmake cm;
    int ret = cm.GetSystemInformation(args);
    return ret;
    }
  cmake cm;
  cmSystemTools::SetErrorCallback(cmakemainErrorCallback, (void *)&cm);
  cm.SetProgressCallback(cmakemainProgressCallback, (void *)&cm);
  cm.SetWorkingMode(workingMode);

  int res = cm.Run(args, view_only);
  if ( list_cached || list_all_cached )
    {
    cmCacheManager::CacheIterator it =
      cm.GetCacheManager()->GetCacheIterator();
    std::cout << "-- Cache values" << std::endl;
    for ( it.Begin(); !it.IsAtEnd(); it.Next() )
      {
      cmCacheManager::CacheEntryType t = it.GetType();
      if ( t != cmCacheManager::INTERNAL && t != cmCacheManager::STATIC &&
        t != cmCacheManager::UNINITIALIZED )
        {
        bool advanced = it.PropertyExists("ADVANCED");
        if ( list_all_cached || !advanced)
          {
          if ( list_help )
            {
            std::cout << "// " << it.GetProperty("HELPSTRING") << std::endl;
            }
          std::cout << it.GetName() << ":" <<
            cmCacheManager::TypeToString(it.GetType())
            << "=" << it.GetValue() << std::endl;
          if ( list_help )
            {
            std::cout << std::endl;
            }
          }
        }
      }
    }

  // Always return a non-negative value.  Windows tools do not always
  // interpret negative return values as errors.
  if(res != 0)
    {
    return 1;
    }
  else
    {
    return 0;
    }
}

//----------------------------------------------------------------------------
static int do_build(int ac, char** av)
{
#ifndef CMAKE_BUILD_WITH_CMAKE
  std::cerr << "This cmake does not support --build\n";
  return -1;
#else
  std::string target;
  std::string config = "Debug";
  std::string dir;
  std::vector<std::string> nativeOptions;
  bool clean = false;
  cmSystemTools::OutputOption outputflag = cmSystemTools::OUTPUT_MERGE;

  enum Doing { DoingNone, DoingDir, DoingTarget, DoingConfig, DoingNative};
  Doing doing = DoingDir;
  for(int i=2; i < ac; ++i)
    {
    if(doing == DoingNative)
      {
      nativeOptions.push_back(av[i]);
      }
    else if(strcmp(av[i], "--target") == 0)
      {
      doing = DoingTarget;
      }
    else if(strcmp(av[i], "--config") == 0)
      {
      doing = DoingConfig;
      }
    else if(strcmp(av[i], "--clean-first") == 0)
      {
      clean = true;
      doing = DoingNone;
      }
    else if(strcmp(av[i], "--use-stderr") == 0)
      {
        outputflag = cmSystemTools::OUTPUT_NORMAL;
      }
    else if(strcmp(av[i], "--") == 0)
      {
      doing = DoingNative;
      }
    else
      {
      switch (doing)
        {
        case DoingDir:
          dir = av[i];
          doing = DoingNone;
          break;
        case DoingTarget:
          target = av[i];
          doing = DoingNone;
          break;
        case DoingConfig:
          config = av[i];
          doing = DoingNone;
          break;
        default:
          std::cerr << "Unknown argument " << av[i] << std::endl;
          dir = "";
          break;
        }
      }
    }
  if(dir.empty())
    {
    std::cerr <<
      "Usage: cmake --build <dir> [options] [-- [native-options]]\n"
      "Options:\n"
      CMAKE_BUILD_OPTIONS
      ;
    return 1;
    }

  // Hack for vs6 that passes ".\Debug" as "$(IntDir)" value:
  //
  if (cmSystemTools::StringStartsWith(config.c_str(), ".\\"))
    {
    config = config.substr(2);
    }

  cmake cm;
  return cm.Build(dir, target, config, nativeOptions, clean, outputflag);
#endif
}