summaryrefslogtreecommitdiffstats
path: root/Source/cmGlobalGenerator.cxx
blob: beef256f8fd84b082fbb8952ae036c4af6751b96 (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
/*=========================================================================

  Program:   CMake - Cross-Platform Makefile Generator
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#include "cmGlobalGenerator.h"
#include "cmLocalGenerator.h"
#include "cmake.h"
#include "cmMakefile.h"
#include <stdlib.h> // required for atof

#if defined(_WIN32) && !defined(__CYGWIN__) 
#include <windows.h>
#endif

int cmGlobalGenerator::s_TryCompileTimeout = 0;

cmGlobalGenerator::cmGlobalGenerator()
{
  // by default use the native paths
  m_ForceUnixPaths = false;
}

cmGlobalGenerator::~cmGlobalGenerator()
{ 
  // Delete any existing cmLocalGenerators
  unsigned int i;
  for (i = 0; i < m_LocalGenerators.size(); ++i)
    {
    delete m_LocalGenerators[i];
    }
  m_LocalGenerators.clear();
}

// Find the make program for the generator, required for try compiles
void cmGlobalGenerator::FindMakeProgram(cmMakefile* mf)
{
  if(m_FindMakeProgramFile.size() == 0)
    {
    cmSystemTools::Error(
      "Generator implementation error, "
      "all generators must specify m_FindMakeProgramFile");
    }
  if(!mf->GetDefinition("CMAKE_MAKE_PROGRAM")
     || cmSystemTools::IsOff(mf->GetDefinition("CMAKE_MAKE_PROGRAM")))
    {
    std::string setMakeProgram = mf->GetModulesFile(m_FindMakeProgramFile.c_str());
    if(setMakeProgram.size())
      {
      mf->ReadListFile(0, setMakeProgram.c_str());
      }
    } 
  if(!mf->GetDefinition("CMAKE_MAKE_PROGRAM")
     || cmSystemTools::IsOff(mf->GetDefinition("CMAKE_MAKE_PROGRAM")))
    {
    cmOStringStream err;
    err << "CMake was unable to find a build program corresponding to \""
        << this->GetName() << "\".  CMAKE_MAKE_PROGRAM is not set.  You "
        << "probably need to select a different build tool.";
    cmSystemTools::Error(err.str().c_str());
    cmSystemTools::SetFatalErrorOccured();
    return;
    }
  std::string makeProgram = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
  // if there are spaces in the make program use short path
  // but do not short path the actual program name, as
  // this can cause trouble with VSExpress
  if(makeProgram.find(' ') != makeProgram.npos)
    {
    std::string dir;
    std::string file;
    cmSystemTools::SplitProgramPath(makeProgram.c_str(),
                                    dir, file);
    std::string saveFile = file;
    cmSystemTools::GetShortPath(makeProgram.c_str(), makeProgram);
    cmSystemTools::SplitProgramPath(makeProgram.c_str(),
                                    dir, file);
    makeProgram = dir;
    makeProgram += "/";
    makeProgram += saveFile;
    this->GetCMakeInstance()->AddCacheEntry("CMAKE_MAKE_PROGRAM", makeProgram.c_str(),
                                            "make program",
                                            cmCacheManager::FILEPATH);
    }
  
}

// enable the given language
void cmGlobalGenerator::EnableLanguage(std::vector<std::string>const& languages,
                                       cmMakefile *mf)
{  
  if(languages.size() == 0)
    {
    cmSystemTools::Error("EnableLanguage must have a lang specified!");
    cmSystemTools::SetFatalErrorOccured();
    return;
    }
  // setup some variables for the EnableLanguage function
  bool isLocal = m_CMakeInstance->GetLocal();
  // if we are from the top, always define this
  if(!isLocal)
    {
    mf->AddDefinition("RUN_CONFIGURE", true);
    }
  bool needTestLanguage = false;
  std::string rootBin = mf->GetHomeOutputDirectory();
  // If the configuration files path has been set,
  // then we are in a try compile and need to copy the enable language
  // files into the try compile directory
  if(m_ConfiguredFilesPath.size())
    {
    std::string src = m_ConfiguredFilesPath;
    src += "/CMakeSystem.cmake";
    std::string dst = rootBin;
    dst += "/CMakeSystem.cmake";
    cmSystemTools::CopyFileIfDifferent(src.c_str(), dst.c_str());
    for(std::vector<std::string>::const_iterator l = languages.begin();
        l != languages.end(); ++l)
      {
      const char* lang = l->c_str();
      std::string src2 = m_ConfiguredFilesPath;
      src2 += "/CMake";
      src2 += lang;
      src2 += "Compiler.cmake";
      std::string dst2 = rootBin;
      dst2 += "/CMake";
      dst2 += lang;
      dst2 += "Compiler.cmake";
      cmSystemTools::CopyFileIfDifferent(src2.c_str(), dst2.c_str());
      }
    rootBin = m_ConfiguredFilesPath;
    }

  // **** Step 1, find and make sure CMAKE_MAKE_PROGRAM is defined
  this->FindMakeProgram(mf);

  // **** Step 2, Load the CMakeDetermineSystem.cmake file and find out
  // what platform we are running on
  if (!isLocal &&  !mf->GetDefinition("CMAKE_SYSTEM_NAME"))
    {
#if defined(_WIN32) && !defined(__CYGWIN__) 
    /* Windows version number data.  */
    OSVERSIONINFO osvi;
    ZeroMemory(&osvi, sizeof(osvi));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    GetVersionEx (&osvi);
    cmOStringStream windowsVersionString;
    windowsVersionString << osvi.dwMajorVersion << "." << osvi.dwMinorVersion;
    windowsVersionString.str();
    mf->AddDefinition("CMAKE_SYSTEM_VERSION", windowsVersionString.str().c_str());
#endif
    // Read the DetermineSystem file
    std::string systemFile = mf->GetModulesFile("CMakeDetermineSystem.cmake");
    mf->ReadListFile(0, systemFile.c_str());
    }
  // **** Step 3, load the CMakeSystem.cmake from the binary directory
  // this file is configured by the CMakeDetermineSystem.cmake file
  std::string fpath = rootBin;
  if(!mf->GetDefinition("CMAKE_SYSTEM_LOADED"))
    {
    fpath += "/CMakeSystem.cmake";
    mf->ReadListFile(0,fpath.c_str());
    }
  // **** Step 4, foreach language 
  // load the CMakeDetermine(LANG)Compiler.cmake file to find
  // the compiler 
  for(std::vector<std::string>::const_iterator l = languages.begin();
      l != languages.end(); ++l)
    {
    const char* lang = l->c_str();
    if(!isLocal && !this->GetLanguageEnabled(lang) )
      {  
      if (m_CMakeInstance->GetIsInTryCompile())
        {
        cmSystemTools::Error("This should not have happen. "
                             "If you see this message, you are probably using a "
                             "broken CMakeLists.txt file or a problematic release of "
                             "CMake");
        }
      needTestLanguage = true; // must test a language after finding it
      // read determine LANG compiler
      std::string determineCompiler = "CMakeDetermine";
      determineCompiler += lang;
      determineCompiler += "Compiler.cmake";
      std::string determineFile = mf->GetModulesFile(determineCompiler.c_str());
      if(!mf->ReadListFile(0,determineFile.c_str()))
        {
        cmSystemTools::Error("Could not find cmake module file:", determineFile.c_str());
        }
      // Some generators like visual studio should not use the env variables
      // So the global generator can specify that in this variable
      if(!mf->GetDefinition("CMAKE_GENERATOR_NO_COMPILER_ENV"))
        {
        // put ${CMake_(LANG)_COMPILER_ENV_VAR}=${CMAKE_(LANG)_COMPILER into the
        // environment, in case user scripts want to run configure, or sub cmakes
        std::string compilerName = "CMAKE_";
        compilerName += lang;
        compilerName += "_COMPILER";
        std::string compilerEnv = "CMAKE_";
        compilerEnv += lang;
        compilerEnv += "_COMPILER_ENV_VAR";
        std::string envVar = mf->GetRequiredDefinition(compilerEnv.c_str());
        std::string envVarValue = mf->GetRequiredDefinition(compilerName.c_str());
        std::string env = envVar;
        env += "=";
        env += envVarValue;
        cmSystemTools::PutEnv(env.c_str());
        }
      }
    
    // **** Step 5, Load the configured language compiler file, if not loaded.
    // look to see if CMAKE_(LANG)_COMPILER_LOADED is set, 
    // if not then load the CMake(LANG)Compiler.cmake file from the
    // binary tree, this is a configured file provided by
    // CMakeDetermine(LANG)Compiler.cmake
    std::string loadedLang = "CMAKE_";
    loadedLang +=  lang;
    loadedLang += "_COMPILER_LOADED";
    if(!mf->GetDefinition(loadedLang.c_str()))
      {
      fpath = rootBin;
      fpath += "/CMake";
      fpath += lang;
      fpath += "Compiler.cmake";
      if(!mf->ReadListFile(0,fpath.c_str()))
        {
        cmSystemTools::Error("Could not find cmake module file:", fpath.c_str());
        }
      this->SetLanguageEnabled(lang, mf);
      }
    }
  
  // **** Step 6, Load the system specific information if not yet loaded
  if (!mf->GetDefinition("CMAKE_SYSTEM_SPECIFIC_INFORMATION_LOADED"))
    {
    fpath = mf->GetModulesFile("CMakeSystemSpecificInformation.cmake");
    if(!mf->ReadListFile(0,fpath.c_str()))
      {
      cmSystemTools::Error("Could not find cmake module file:", fpath.c_str());
      }
    }
  for(std::vector<std::string>::const_iterator l = languages.begin();
      l != languages.end(); ++l)
    {
    const char* lang = l->c_str();
    std::string langLoadedVar = "CMAKE_";
    langLoadedVar += lang;
    langLoadedVar += "_INFORMATION_LOADED";
    if (!mf->GetDefinition(langLoadedVar.c_str()))
      { 
      fpath = "CMake";
      fpath +=  lang;
      fpath += "Information.cmake";
      fpath = mf->GetModulesFile(fpath.c_str());
      if(!mf->ReadListFile(0,fpath.c_str()))
        {
        cmSystemTools::Error("Could not find cmake module file:", fpath.c_str());
        }
      }
    // **** Step 7, Test the compiler for the language just setup
    // At this point we should have enough info for a try compile
    // which is used in the backward stuff
    if(!isLocal)
      {
      if(needTestLanguage)
        {
        if (!m_CMakeInstance->GetIsInTryCompile())
          {
          std::string testLang = "CMakeTest";
          testLang += lang;
          testLang += "Compiler.cmake";
          std::string ifpath = mf->GetModulesFile(testLang.c_str());
          if(!mf->ReadListFile(0,ifpath.c_str()))
            {
            cmSystemTools::Error("Could not find cmake module file:", ifpath.c_str());
            }
          // **** Step 8, load backwards compatibility stuff for C and CXX
          // for old versions of CMake ListFiles C and CXX had some
          // backwards compatibility files they have to load
          const char* versionValue
            = mf->GetDefinition("CMAKE_BACKWARDS_COMPATIBILITY");
          if (atof(versionValue) <= 1.4)
            {
            if(strcmp(lang, "C") == 0)
              {
              ifpath =  mf->GetModulesFile("CMakeBackwardCompatibilityC.cmake");
              mf->ReadListFile(0,ifpath.c_str()); 
              }
            if(strcmp(lang, "CXX") == 0)
              {
              ifpath =  mf->GetModulesFile("CMakeBackwardCompatibilityCXX.cmake");
              mf->ReadListFile(0,ifpath.c_str()); 
              }
            
            }
          }
        }
      }
    }
}

const char* cmGlobalGenerator::GetLanguageOutputExtensionForLanguage(const char* lang)
{
  if(!lang) 
    {
    return "";
    }
  if(m_LanguageToOutputExtension.count(lang) > 0)
    {
    return m_LanguageToOutputExtension[lang].c_str();
    }
  return "";
}

const char* cmGlobalGenerator::GetLanguageOutputExtensionFromExtension(const char* ext)
{
  if(!ext)
    {
    return "";
    }
  const char* lang = this->GetLanguageFromExtension(ext);
  return this->GetLanguageOutputExtensionForLanguage(lang);
}


const char* cmGlobalGenerator::GetLanguageFromExtension(const char* ext)
{
  // if there is an extension and it starts with . then
  // move past the . because the extensions are not stored with a .
  // in the map
  if(ext && *ext == '.')
    {
    ++ext;
    }
  if(m_ExtensionToLanguage.count(ext) > 0)
    {
    return m_ExtensionToLanguage[ext].c_str();
    }
  return 0;
}

void cmGlobalGenerator::SetLanguageEnabled(const char* l, cmMakefile* mf)
{
  if(m_LanguageEnabled.count(l) > 0)
    {
    return;
    }
  std::string outputExtensionVar = std::string("CMAKE_") + 
    std::string(l) + std::string("_OUTPUT_EXTENSION");
  const char* outputExtension = mf->GetDefinition(outputExtensionVar.c_str());
  if(outputExtension)
    {
    m_LanguageToOutputExtension[l] = outputExtension;
    }
  
  std::string linkerPrefVar = std::string("CMAKE_") + 
    std::string(l) + std::string("_LINKER_PREFERENCE");
  const char* linkerPref = mf->GetDefinition(linkerPrefVar.c_str());
  if(!linkerPref)
    {
    linkerPref = "None";
    }
  m_LanguageToLinkerPreference[l] = linkerPref;
  
  std::string extensionsVar = std::string("CMAKE_") + 
    std::string(l) + std::string("_SOURCE_FILE_EXTENSIONS");
  std::string ignoreExtensionsVar = std::string("CMAKE_") + 
    std::string(l) + std::string("_IGNORE_EXTENSIONS");
  std::string ignoreExts = mf->GetSafeDefinition(ignoreExtensionsVar.c_str());
  std::string exts = mf->GetSafeDefinition(extensionsVar.c_str());
  std::vector<std::string> extensionList;
  cmSystemTools::ExpandListArgument(exts, extensionList);
  for(std::vector<std::string>::iterator i = extensionList.begin();
      i != extensionList.end(); ++i)
    {
    m_ExtensionToLanguage[*i] = l;
    }
  cmSystemTools::ExpandListArgument(ignoreExts, extensionList);
  for(std::vector<std::string>::iterator i = extensionList.begin();
      i != extensionList.end(); ++i)
    {
    m_IgnoreExtensions[*i] = true;
    }
  m_LanguageEnabled[l] = true;

}
bool cmGlobalGenerator::IgnoreFile(const char* l)
{
  if(this->GetLanguageFromExtension(l))
    {
    return false;
    }
  return (m_IgnoreExtensions.count(l) > 0);
}

bool cmGlobalGenerator::GetLanguageEnabled(const char* l)
{
  return (m_LanguageEnabled.count(l) > 0);
}

void cmGlobalGenerator::ClearEnabledLanguages()
{
  m_LanguageEnabled.clear();
}

void cmGlobalGenerator::Configure()
{
  // Delete any existing cmLocalGenerators
  unsigned int i;
  for (i = 0; i < m_LocalGenerators.size(); ++i)
    {
    delete m_LocalGenerators[i];
    }
  m_LocalGenerators.clear();
  
  // start with this directory
  cmLocalGenerator *lg = this->CreateLocalGenerator();
  m_LocalGenerators.push_back(lg);

  // set the Start directories
  lg->GetMakefile()->SetStartDirectory(m_CMakeInstance->GetStartDirectory());
  lg->GetMakefile()->SetStartOutputDirectory(m_CMakeInstance->GetStartOutputDirectory());
  lg->GetMakefile()->MakeStartDirectoriesCurrent();
  
  // now do it
  this->RecursiveConfigure(lg,0.0f,0.9f);

  std::set<cmStdString> notFoundMap;
  // after it is all done do a ConfigureFinalPass
  cmCacheManager* manager = 0;
  for (i = 0; i < m_LocalGenerators.size(); ++i)
    {
    manager = m_LocalGenerators[i]->GetMakefile()->GetCacheManager();
    m_LocalGenerators[i]->ConfigureFinalPass();
    cmTargets const& targets = m_LocalGenerators[i]->GetMakefile()->GetTargets(); 
    for (cmTargets::const_iterator l = targets.begin();
         l != targets.end(); l++)
      {
      cmTarget::LinkLibraries libs = l->second.GetLinkLibraries();
      for(cmTarget::LinkLibraries::iterator lib = libs.begin();
          lib != libs.end(); ++lib)
        {
        if(lib->first.size() > 9 && 
           cmSystemTools::IsNOTFOUND(lib->first.c_str()))
          {
          std::string varName = lib->first.substr(0, lib->first.size()-9);
          notFoundMap.insert(varName);
          }
        }
      std::vector<std::string>& incs = 
        m_LocalGenerators[i]->GetMakefile()->GetIncludeDirectories();
      
      for( std::vector<std::string>::iterator lib = incs.begin();
           lib != incs.end(); ++lib)
        {
        if(lib->size() > 9 && 
           cmSystemTools::IsNOTFOUND(lib->c_str()))
          {
          std::string varName = lib->substr(0, lib->size()-9); 
          notFoundMap.insert(varName);
          }
        }
      m_CMakeInstance->UpdateProgress("Configuring", 
                                    0.9f+0.1f*(i+1.0f)/m_LocalGenerators.size());
      m_LocalGenerators[i]->GetMakefile()->CheckInfiniteLoops();
      }
    }

  if(notFoundMap.size())
    {
    std::string notFoundVars;
    for(std::set<cmStdString>::iterator ii = notFoundMap.begin();
        ii != notFoundMap.end(); ++ii)
      { 
      notFoundVars += *ii;
      if(manager)
        {
        cmCacheManager::CacheIterator it = 
          manager->GetCacheIterator(ii->c_str());
        if(it.GetPropertyAsBool("ADVANCED"))
          {
          notFoundVars += " (ADVANCED)";
          }
        }
      notFoundVars += "\n";
      }
    cmSystemTools::Error("This project requires some variables to be set,\n"
                         "and cmake can not find them.\n"
                         "Please set the following variables:\n",
                         notFoundVars.c_str());
    }
  if ( !m_CMakeInstance->GetScriptMode() )
    {
    m_CMakeInstance->UpdateProgress("Configuring done", -1);
    }
}

// loop through the directories creating cmLocalGenerators and Configure()
void cmGlobalGenerator::RecursiveConfigure(cmLocalGenerator *lg, 
                                           float startProgress, 
                                           float endProgress)
{
  // configure the current directory
  lg->Configure();
                                  
  // get all the subdirectories
  std::vector<std::pair<cmStdString, bool> > subdirs = lg->GetMakefile()->GetSubDirectories();
  float progressPiece = (endProgress - startProgress)/(1.0f+subdirs.size());
  m_CMakeInstance->UpdateProgress("Configuring",
                                  startProgress + progressPiece);
  
  // for each subdir recurse
  unsigned int i;
  for (i = 0; i < subdirs.size(); ++i)
    {
    cmLocalGenerator *lg2 = this->CreateLocalGenerator();
    lg2->SetParent(lg);
    m_LocalGenerators.push_back(lg2);
    
    // add the subdir to the start output directory
    std::string outdir = lg->GetMakefile()->GetStartOutputDirectory();
    outdir += "/";
    outdir += subdirs[i].first;
    lg2->GetMakefile()->SetStartOutputDirectory(outdir.c_str());
    lg2->SetExcludeAll(!subdirs[i].second);
    // add the subdir to the start source directory
    std::string currentDir = lg->GetMakefile()->GetStartDirectory();
    currentDir += "/";
    currentDir += subdirs[i].first;
    lg2->GetMakefile()->SetStartDirectory(currentDir.c_str());
    lg2->GetMakefile()->MakeStartDirectoriesCurrent();
  
    this->RecursiveConfigure(lg2, 
                             startProgress + (i+1.0f)*progressPiece,
                             startProgress + (i+2.0f)*progressPiece);
    }
}

void cmGlobalGenerator::Generate()
{
  // For each existing cmLocalGenerator
  unsigned int i;
  for (i = 0; i < m_LocalGenerators.size(); ++i)
    {
    m_LocalGenerators[i]->Generate(true);
    m_LocalGenerators[i]->GenerateInstallRules();
    m_CMakeInstance->UpdateProgress("Generating", 
                                    (i+1.0f)/m_LocalGenerators.size());
    }
  m_CMakeInstance->UpdateProgress("Generating done", -1);
}

void cmGlobalGenerator::LocalGenerate()
{
  // for this case we create one LocalGenerator
  // configure it, and then Generate it
  // start with this directory
  cmLocalGenerator *lg = this->CreateLocalGenerator();

  // set the Start directories
  lg->GetMakefile()->SetStartDirectory(m_CMakeInstance->GetStartDirectory());
  lg->GetMakefile()->SetStartOutputDirectory(m_CMakeInstance->GetStartOutputDirectory());
  lg->GetMakefile()->MakeStartDirectoriesCurrent();
  
  // now do trhe configure
  lg->Configure();
  lg->ConfigureFinalPass();
  lg->Generate(false);
  delete lg;
}

int cmGlobalGenerator::TryCompile(const char *, const char *bindir, 
                                  const char *, const char *target,
                                  std::string *output, cmMakefile*)
{
  // now build the test
  std::string makeCommand = 
    m_CMakeInstance->GetCacheManager()->GetCacheValue("CMAKE_MAKE_PROGRAM");
  if(makeCommand.size() == 0)
    {
    cmSystemTools::Error(
      "Generator cannot find the appropriate make command.");
    return 1;
    }
  makeCommand = cmSystemTools::ConvertToOutputPath(makeCommand.c_str());

  /**
   * Run an executable command and put the stdout in output.
   */
  std::string cwd = cmSystemTools::GetCurrentWorkingDirectory();
  cmSystemTools::ChangeDirectory(bindir);

  // Since we have full control over the invocation of nmake, let us
  // make it quiet.
  if ( strcmp(this->GetName(), "NMake Makefiles") == 0 )
    {
    makeCommand += " /NOLOGO ";
    }
  
  // now build
  if (target)
    {
    makeCommand += " ";
    makeCommand += target;
#if defined(_WIN32) || defined(__CYGWIN__)
    std::string tmp = target;
    // if the target does not already end in . something 
    // then assume .exe
    if(tmp.size() < 4 || tmp[tmp.size()-4] != '.')
      {
      makeCommand += ".exe";
      }
#endif // WIN32
    }
  else
    {
    makeCommand += " all";
    }
  int retVal;
  int timeout = cmGlobalGenerator::s_TryCompileTimeout;
  bool hideconsole = cmSystemTools::GetRunCommandHideConsole();
  cmSystemTools::SetRunCommandHideConsole(true);
  if (!cmSystemTools::RunSingleCommand(makeCommand.c_str(), output, 
      &retVal, 0, false, timeout))
    {
    cmSystemTools::SetRunCommandHideConsole(hideconsole);
    cmSystemTools::Error("Generator: execution of make failed.");
    // return to the original directory
    cmSystemTools::ChangeDirectory(cwd.c_str());
    return 1;
    }
  cmSystemTools::SetRunCommandHideConsole(hideconsole);
  
  // The SGI MipsPro 7.3 compiler does not return an error code when
  // the source has a #error in it!  This is a work-around for such
  // compilers.
  if((retVal == 0) && (output->find("#error") != std::string::npos))
    {
    retVal = 1;
    }
  
  cmSystemTools::ChangeDirectory(cwd.c_str());
  return retVal;
}

cmLocalGenerator *cmGlobalGenerator::CreateLocalGenerator()
{
  cmLocalGenerator *lg = new cmLocalGenerator;
  lg->SetGlobalGenerator(this);
  return lg;
}

void cmGlobalGenerator::EnableLanguagesFromGenerator(cmGlobalGenerator *gen )
{
  this->SetConfiguredFilesPath(
    gen->GetCMakeInstance()->GetHomeOutputDirectory());
  const char* make =
    gen->GetCMakeInstance()->GetCacheDefinition("CMAKE_MAKE_PROGRAM");
  this->GetCMakeInstance()->AddCacheEntry("CMAKE_MAKE_PROGRAM", make,
                                          "make program",
                                          cmCacheManager::FILEPATH);
  // copy the enabled languages
  this->m_LanguageEnabled = gen->m_LanguageEnabled;
  this->m_ExtensionToLanguage = gen->m_ExtensionToLanguage;
  this->m_IgnoreExtensions = gen->m_IgnoreExtensions;
  this->m_LanguageToOutputExtension = gen->m_LanguageToOutputExtension;
  this->m_LanguageToLinkerPreference = gen->m_LanguageToLinkerPreference;
}

//----------------------------------------------------------------------------
void cmGlobalGenerator::GetDocumentation(cmDocumentationEntry& entry) const
{
  entry.name = this->GetName();
  entry.brief = "";
  entry.full = "";
}

bool cmGlobalGenerator::IsExcluded(cmLocalGenerator* root, 
                                                cmLocalGenerator* gen)
{
  cmLocalGenerator* cur = gen->GetParent();
  while(cur && cur != root)
    {
    if(cur->GetExcludeAll())
      {
      return true;
      }
    cur = cur->GetParent();
    }
  return false;
}


void cmGlobalGenerator::GetEnabledLanguages(std::vector<std::string>& lang)
{
  for(std::map<cmStdString, bool>::iterator i = m_LanguageEnabled.begin(); 
      i != m_LanguageEnabled.end(); ++i)
    {
    lang.push_back(i->first);
    }
}

const char* cmGlobalGenerator::GetLinkerPreference(const char* lang)
{
  if(m_LanguageToLinkerPreference.count(lang))
    {
    return m_LanguageToLinkerPreference[lang].c_str();
    }
  return "None";
}