CMake.git - CMake is a cross-platform, open-source build system generator.

path: root/Modules/CMakeDetermineCompilerId.cmake

diff options

author	Stephen Kelly <steveire@gmail.com>	2015-05-16 05:30:33 (GMT)
committer	Stephen Kelly <steveire@gmail.com>	2015-05-19 20:36:49 (GMT)
commit	8ab1cce7047b637f504b4b83cecc104e5cd1adc5 (patch)
tree	95e05e056f4e4a0f7d6415f1b0e56d4188043a43 /Modules/CMakeDetermineCompilerId.cmake
parent	2dd5d42f5254abda64009434f0b11a47ca16640e (diff)
download	CMake-8ab1cce7047b637f504b4b83cecc104e5cd1adc5.zip CMake-8ab1cce7047b637f504b4b83cecc104e5cd1adc5.tar.gz CMake-8ab1cce7047b637f504b4b83cecc104e5cd1adc5.tar.bz2

cmMakefile: Rename method to something more appropriate.

Allow the name to be used for something more-suitable.

Diffstat (limited to 'Modules/CMakeDetermineCompilerId.cmake')

0 files changed, 0 insertions, 0 deletions

' href='#n131'>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

/*============================================================================
  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 "cmDependsC.h"

#include "cmFileTimeComparison.h"
#include "cmLocalGenerator.h"
#include "cmMakefile.h"
#include "cmSystemTools.h"
#include <cmsys/FStream.hxx>

#include <ctype.h> // isspace


#define INCLUDE_REGEX_LINE \
  "^[ \t]*#[ \t]*(include|import)[ \t]*[<\"]([^\">]+)([\">])"

#define INCLUDE_REGEX_LINE_MARKER "#IncludeRegexLine: "
#define INCLUDE_REGEX_SCAN_MARKER "#IncludeRegexScan: "
#define INCLUDE_REGEX_COMPLAIN_MARKER "#IncludeRegexComplain: "
#define INCLUDE_REGEX_TRANSFORM_MARKER "#IncludeRegexTransform: "

//----------------------------------------------------------------------------
cmDependsC::cmDependsC()
: ValidDeps(0)
{
}

//----------------------------------------------------------------------------
cmDependsC::cmDependsC(cmLocalGenerator* lg,
                   const char* targetDir,
                   const std::string& lang,
                   const std::map<std::string, DependencyVector>* validDeps)
: cmDepends(lg, targetDir)
, ValidDeps(validDeps)
{
  cmMakefile* mf = lg->GetMakefile();

  // Configure the include file search path.
  this->SetIncludePathFromLanguage(lang);

  // Configure regular expressions.
  std::string scanRegex = "^.*$";
  std::string complainRegex = "^$";
  {
  std::string scanRegexVar = "CMAKE_";
  scanRegexVar += lang;
  scanRegexVar += "_INCLUDE_REGEX_SCAN";
  if(const char* sr = mf->GetDefinition(scanRegexVar))
    {
    scanRegex = sr;
    }
  std::string complainRegexVar = "CMAKE_";
  complainRegexVar += lang;
  complainRegexVar += "_INCLUDE_REGEX_COMPLAIN";
  if(const char* cr = mf->GetDefinition(complainRegexVar))
    {
    complainRegex = cr;
    }
  }

  this->IncludeRegexLine.compile(INCLUDE_REGEX_LINE);
  this->IncludeRegexScan.compile(scanRegex.c_str());
  this->IncludeRegexComplain.compile(complainRegex.c_str());
  this->IncludeRegexLineString = INCLUDE_REGEX_LINE_MARKER INCLUDE_REGEX_LINE;
  this->IncludeRegexScanString = INCLUDE_REGEX_SCAN_MARKER;
  this->IncludeRegexScanString += scanRegex;
  this->IncludeRegexComplainString = INCLUDE_REGEX_COMPLAIN_MARKER;
  this->IncludeRegexComplainString += complainRegex;

  this->SetupTransforms();

  this->CacheFileName = this->TargetDirectory;
  this->CacheFileName += "/";
  this->CacheFileName += lang;
  this->CacheFileName += ".includecache";

  this->ReadCacheFile();
}

//----------------------------------------------------------------------------
cmDependsC::~cmDependsC()
{
  this->WriteCacheFile();
  cmDeleteAll(this->FileCache);
}

//----------------------------------------------------------------------------
bool cmDependsC::WriteDependencies(const std::set<std::string>& sources,
                                   const std::string& obj,
                                   std::ostream& makeDepends,
                                   std::ostream& internalDepends)
{
  // Make sure this is a scanning instance.
  if(sources.empty() || sources.begin()->empty())
    {
    cmSystemTools::Error("Cannot scan dependencies without a source file.");
    return false;
    }
  if(obj.empty())
    {
    cmSystemTools::Error("Cannot scan dependencies without an object file.");
    return false;
    }

  std::set<std::string> dependencies;
  bool haveDeps = false;

  if (this->ValidDeps != 0)
    {
    std::map<std::string, DependencyVector>::const_iterator tmpIt =
                                                    this->ValidDeps->find(obj);
    if (tmpIt!= this->ValidDeps->end())
      {
      dependencies.insert(tmpIt->second.begin(), tmpIt->second.end());
      haveDeps = true;
      }
    }

  if (!haveDeps)
    {
    // Walk the dependency graph starting with the source file.
    int srcFiles = (int)sources.size();
    this->Encountered.clear();

    for(std::set<std::string>::const_iterator srcIt = sources.begin();
        srcIt != sources.end(); ++srcIt)
      {
      UnscannedEntry root;
      root.FileName = *srcIt;
      this->Unscanned.push(root);
      this->Encountered.insert(*srcIt);
      }

    std::set<std::string> scanned;

    // Use reserve to allocate enough memory for tempPathStr
    // so that during the loops no memory is allocated or freed
    std::string tempPathStr;
    tempPathStr.reserve(4*1024);

    while(!this->Unscanned.empty())
      {
      // Get the next file to scan.
      UnscannedEntry current = this->Unscanned.front();
      this->Unscanned.pop();

      // If not a full path, find the file in the include path.
      std::string fullName;
      if((srcFiles>0)
         || cmSystemTools::FileIsFullPath(current.FileName.c_str()))
        {
        if(cmSystemTools::FileExists(current.FileName.c_str(), true))
          {
          fullName = current.FileName;
          }
        }
      else if(!current.QuotedLocation.empty() &&
              cmSystemTools::FileExists(current.QuotedLocation.c_str(), true))
        {
        // The include statement producing this entry was a double-quote
        // include and the included file is present in the directory of
        // the source containing the include statement.
        fullName = current.QuotedLocation;
        }
      else
        {
        std::map<std::string, std::string>::iterator
          headerLocationIt=this->HeaderLocationCache.find(current.FileName);
        if (headerLocationIt!=this->HeaderLocationCache.end())
          {
          fullName=headerLocationIt->second;
          }
        else for(std::vector<std::string>::const_iterator i =
              this->IncludePath.begin(); i != this->IncludePath.end(); ++i)
          {
          // Construct the name of the file as if it were in the current
          // include directory.  Avoid using a leading "./".

          tempPathStr =
            cmSystemTools::CollapseCombinedPath(*i, current.FileName);

          // Look for the file in this location.
          if(cmSystemTools::FileExists(tempPathStr.c_str(), true))
            {
            fullName = tempPathStr;
            HeaderLocationCache[current.FileName]=fullName;
            break;
            }
          }
        }

      // Complain if the file cannot be found and matches the complain
      // regex.
      if(fullName.empty() &&
        this->IncludeRegexComplain.find(current.FileName.c_str()))
        {
        cmSystemTools::Error("Cannot find file \"",
                            current.FileName.c_str(), "\".");
        return false;
        }

      // Scan the file if it was found and has not been scanned already.
      if(!fullName.empty() && (scanned.find(fullName) == scanned.end()))
        {
        // Record scanned files.
        scanned.insert(fullName);

        // Check whether this file is already in the cache
        std::map<std::string, cmIncludeLines*>::iterator fileIt=
          this->FileCache.find(fullName);
        if (fileIt!=this->FileCache.end())
          {
          fileIt->second->Used=true;
          dependencies.insert(fullName);
          for (std::vector<UnscannedEntry>::const_iterator incIt=
                fileIt->second->UnscannedEntries.begin();
              incIt!=fileIt->second->UnscannedEntries.end(); ++incIt)
            {
            if (this->Encountered.find(incIt->FileName) ==
                this->Encountered.end())
              {
              this->Encountered.insert(incIt->FileName);
              this->Unscanned.push(*incIt);
              }
            }
          }
        else
          {

          // Try to scan the file.  Just leave it out if we cannot find
          // it.
          cmsys::ifstream fin(fullName.c_str());
          if(fin)
            {
            // Add this file as a dependency.
            dependencies.insert(fullName);

            // Scan this file for new dependencies.  Pass the directory
            // containing the file to handle double-quote includes.
            std::string dir = cmSystemTools::GetFilenamePath(fullName);
            this->Scan(fin, dir.c_str(), fullName);
            }
          }
        }

      srcFiles--;
      }
    }

  // Write the dependencies to the output stream.  Makefile rules
  // written by the original local generator for this directory
  // convert the dependencies to paths relative to the home output
  // directory.  We must do the same here.
  std::string obj_i =
    this->LocalGenerator->Convert(obj, cmLocalGenerator::HOME_OUTPUT);
  std::string obj_m =
    this->LocalGenerator->ConvertToOutputFormat(obj_i,
                                                cmLocalGenerator::MAKERULE);
  internalDepends << obj_i << std::endl;

  for(std::set<std::string>::const_iterator i=dependencies.begin();
      i != dependencies.end(); ++i)
    {
    makeDepends << obj_m << ": " <<
      this->LocalGenerator->Convert(*i,
                                    cmLocalGenerator::HOME_OUTPUT,
                                    cmLocalGenerator::MAKERULE)
                << std::endl;
    internalDepends << " " << *i << std::endl;
    }
  makeDepends << std::endl;

  return true;
}

//----------------------------------------------------------------------------
void cmDependsC::ReadCacheFile()
{
  if(this->CacheFileName.empty())
    {
    return;
    }
  cmsys::ifstream fin(this->CacheFileName.c_str());
  if(!fin)
    {
    return;
    }

  std::string line;
  cmIncludeLines* cacheEntry=0;
  bool haveFileName=false;

  while(cmSystemTools::GetLineFromStream(fin, line))
    {
    if (line.empty())
      {
      cacheEntry=0;
      haveFileName=false;
      continue;
      }
    //the first line after an empty line is the name of the parsed file
    if (haveFileName==false)
      {
      haveFileName=true;
      int newer=0;
      cmFileTimeComparison comp;
      bool res=comp.FileTimeCompare(this->CacheFileName.c_str(),
                                    line.c_str(), &newer);

      if ((res==true) && (newer==1)) //cache is newer than the parsed file
        {
        cacheEntry=new cmIncludeLines;
        this->FileCache[line]=cacheEntry;
        }
      // file doesn't exist, check that the regular expressions
      // haven't changed
      else if (res==false)
        {
        if (line.find(INCLUDE_REGEX_LINE_MARKER) == 0)
          {
          if (line != this->IncludeRegexLineString)
            {
            return;
            }
          }
        else if (line.find(INCLUDE_REGEX_SCAN_MARKER) == 0)
          {
          if (line != this->IncludeRegexScanString)
            {
            return;
            }
          }
        else if (line.find(INCLUDE_REGEX_COMPLAIN_MARKER) == 0)
          {
          if (line != this->IncludeRegexComplainString)
            {
            return;
            }
          }
        else if (line.find(INCLUDE_REGEX_TRANSFORM_MARKER) == 0)
          {
          if (line != this->IncludeRegexTransformString)
            {
            return;
            }
          }
        }
      }
    else if (cacheEntry!=0)
      {
      UnscannedEntry entry;
      entry.FileName = line;
      if (cmSystemTools::GetLineFromStream(fin, line))
        {
        if (line!="-")
          {
          entry.QuotedLocation=line;
          }
        cacheEntry->UnscannedEntries.push_back(entry);
        }
      }
    }
}

//----------------------------------------------------------------------------
void cmDependsC::WriteCacheFile() const
{
  if(this->CacheFileName.empty())
    {
    return;
    }
  cmsys::ofstream cacheOut(this->CacheFileName.c_str());
  if(!cacheOut)
    {
    return;
    }

  cacheOut << this->IncludeRegexLineString << "\n\n";
  cacheOut << this->IncludeRegexScanString << "\n\n";
  cacheOut << this->IncludeRegexComplainString << "\n\n";
  cacheOut << this->IncludeRegexTransformString << "\n\n";

  for (std::map<std::string, cmIncludeLines*>::const_iterator fileIt=
         this->FileCache.begin();
       fileIt!=this->FileCache.end(); ++fileIt)
    {
    if (fileIt->second->Used)
      {
      cacheOut<<fileIt->first.c_str()<<std::endl;

      for (std::vector<UnscannedEntry>::const_iterator
             incIt=fileIt->second->UnscannedEntries.begin();
           incIt!=fileIt->second->UnscannedEntries.end(); ++incIt)
        {
        cacheOut<<incIt->FileName.c_str()<<std::endl;
        if (incIt->QuotedLocation.empty())
          {
          cacheOut<<"-"<<std::endl;
          }
        else
          {
          cacheOut<<incIt->QuotedLocation.c_str()<<std::endl;
          }
        }
      cacheOut<<std::endl;
      }
   }
}

//----------------------------------------------------------------------------
void cmDependsC::Scan(std::istream& is, const char* directory,
  const std::string& fullName)
{
  cmIncludeLines* newCacheEntry=new cmIncludeLines;
  newCacheEntry->Used=true;
  this->FileCache[fullName]=newCacheEntry;

  // Read one line at a time.
  std::string line;
  while(cmSystemTools::GetLineFromStream(is, line))
    {
    // Transform the line content first.
    if(!this->TransformRules.empty())
      {
      this->TransformLine(line);
      }

    // Match include directives.
    if(this->IncludeRegexLine.find(line.c_str()))
      {
      // Get the file being included.
      UnscannedEntry entry;
      entry.FileName = this->IncludeRegexLine.match(2);
      cmSystemTools::ConvertToUnixSlashes(entry.FileName);
      if(this->IncludeRegexLine.match(3) == "\"" &&
         !cmSystemTools::FileIsFullPath(entry.FileName.c_str()))
        {
        // This was a double-quoted include with a relative path.  We
        // must check for the file in the directory containing the
        // file we are scanning.
        entry.QuotedLocation =
          cmSystemTools::CollapseCombinedPath(directory, entry.FileName);
        }

      // Queue the file if it has not yet been encountered and it
      // matches the regular expression for recursive scanning.  Note
      // that this check does not account for the possibility of two
      // headers with the same name in different directories when one
      // is included by double-quotes and the other by angle brackets.
      // It also does not work properly if two header files with the same
      // name exist in different directories, and both are included from a
      // file their own directory by simply using "filename.h" (#12619)
      // This kind of problem will be fixed when a more
      // preprocessor-like implementation of this scanner is created.
      if (this->IncludeRegexScan.find(entry.FileName.c_str()))
        {
        newCacheEntry->UnscannedEntries.push_back(entry);
        if(this->Encountered.find(entry.FileName) == this->Encountered.end())
          {
          this->Encountered.insert(entry.FileName);
          this->Unscanned.push(entry);
          }
        }
      }
    }
}

//----------------------------------------------------------------------------
void cmDependsC::SetupTransforms()
{
  // Get the transformation rules.
  std::vector<std::string> transformRules;
  cmMakefile* mf = this->LocalGenerator->GetMakefile();
  if(const char* xform =
     mf->GetDefinition("CMAKE_INCLUDE_TRANSFORMS"))
    {
    cmSystemTools::ExpandListArgument(xform, transformRules, true);
    }
  for(std::vector<std::string>::const_iterator tri = transformRules.begin();
      tri != transformRules.end(); ++tri)
    {
    this->ParseTransform(*tri);
    }

  this->IncludeRegexTransformString = INCLUDE_REGEX_TRANSFORM_MARKER;
  if(!this->TransformRules.empty())
    {
    // Construct the regular expression to match lines to be
    // transformed.
    std::string xform = "^([ \t]*#[ \t]*(include|import)[ \t]*)(";
    const char* sep = "";
    for(TransformRulesType::const_iterator tri = this->TransformRules.begin();
        tri != this->TransformRules.end(); ++tri)
      {
      xform += sep;
      xform += tri->first;
      sep = "|";
      }
    xform += ")[ \t]*\\(([^),]*)\\)";
    this->IncludeRegexTransform.compile(xform.c_str());

    // Build a string that encodes all transformation rules and will
    // change when rules are changed.
    this->IncludeRegexTransformString += xform;
    for(TransformRulesType::const_iterator tri = this->TransformRules.begin();
        tri != this->TransformRules.end(); ++tri)
      {
      this->IncludeRegexTransformString += " ";
      this->IncludeRegexTransformString += tri->first;
      this->IncludeRegexTransformString += "(%)=";
      this->IncludeRegexTransformString += tri->second;
      }
    }
}

//----------------------------------------------------------------------------
void cmDependsC::ParseTransform(std::string const& xform)
{
  // A transform rule is of the form SOME_MACRO(%)=value-with-%
  // We can simply separate with "(%)=".
  std::string::size_type pos = xform.find("(%)=");
  if(pos == xform.npos || pos == 0)
    {
    return;
    }
  std::string name = xform.substr(0, pos);
  std::string value = xform.substr(pos+4, xform.npos);
  this->TransformRules[name] = value;
}

//----------------------------------------------------------------------------
void cmDependsC::TransformLine(std::string& line)
{
  // Check for a transform rule match.  Return if none.
  if(!this->IncludeRegexTransform.find(line.c_str()))
    {
    return;
    }
  TransformRulesType::const_iterator tri =
    this->TransformRules.find(this->IncludeRegexTransform.match(3));
  if(tri == this->TransformRules.end())
    {
    return;
    }

  // Construct the transformed line.
  std::string newline = this->IncludeRegexTransform.match(1);
  std::string arg = this->IncludeRegexTransform.match(4);
  for(const char* c = tri->second.c_str(); *c; ++c)
    {
    if(*c == '%')
      {
      newline += arg;
      }
    else
      {
      newline += *c;
      }
    }

  // Return the transformed line.
  line = newline;
}


context:
space:
mode: