Method ResolveLanguageCompiler

Source/cmGlobalGenerator.cxx:251–307

}

void cmGlobalGenerator::ResolveLanguageCompiler(std::string const& lang,
                                                cmMakefile* mf,
                                                bool optional) const
{
  std::string langComp = cmStrCat("CMAKE_", lang, "_COMPILER");

  if (!mf->GetDefinition(langComp)) {
    if (!optional) {
      cmSystemTools::Error(
        cmStrCat(langComp, " not set, after EnableLanguage"));
    }
    return;
  }
  std::string const& name = mf->GetRequiredDefinition(langComp);
  std::string path;
  if (!cmSystemTools::FileIsFullPath(name)) {
    path = cmSystemTools::FindProgram(name);
  } else {
    path = name;
  }
  if (!optional && (path.empty() || !cmSystemTools::FileExists(path))) {
    return;
  }
  cmValue cname =
    this->GetCMakeInstance()->GetState()->GetInitializedCacheValue(langComp);

  // Split compiler from arguments
  cmList cnameArgList;
  if (cname && !cname->empty()) {
    cnameArgList.assign(*cname);
    cname = cmValue(cnameArgList.front());
  }

  std::string changeVars;
  if (cname && !optional) {
    cmCMakePath cachedPath;
    if (!cmSystemTools::FileIsFullPath(*cname)) {
      cachedPath = cmSystemTools::FindProgram(*cname);
    } else {
      cachedPath = *cname;
    }
    cmCMakePath foundPath = path;
    if (foundPath.Normal() != cachedPath.Normal()) {
      cmValue cvars = this->GetCMakeInstance()->GetState()->GetGlobalProperty(
        "__CMAKE_DELETE_CACHE_CHANGE_VARS_");
      if (cvars) {
        changeVars += *cvars;
        changeVars += ";";
      }
      changeVars += langComp;
      changeVars += ";";
      changeVars += *cname;
      this->GetCMakeInstance()->GetState()->SetGlobalProperty(
        "__CMAKE_DELETE_CACHE_CHANGE_VARS_", changeVars);
    }
  }
}