Method ProcessEnvironment

Source/cmGlobalFastbuildGenerator.cxx:238–290

}

void cmGlobalFastbuildGenerator::ProcessEnvironment()
{
  bool const CaptureSystemEnv =
    !this->GetGlobalSetting(FASTBUILD_CAPTURE_SYSTEM_ENV).IsSet() ||
    this->GetGlobalSetting(FASTBUILD_CAPTURE_SYSTEM_ENV).IsOn();
  // On Windows environment is needed for MSVC, but preserve ability to discard
  // it from the generated file if requested.
  if (CaptureSystemEnv) {
    LocalEnvironment = cmSystemTools::GetEnvironmentVariables();
  }
  // FASTBuild strips off "-isysroot" command line option (see :
  // https://github.com/fastbuild/fastbuild/issues/1066).
  // If 'SDK_ROOT' is not set via env and '-isysroot' is absent, AppleClang
  // seems to use MacOS SDK by default (even though FBuild flattens includes
  // before compiling). It breaks cross-compilation for iOS. Tested in
  // "RunCMake.Framework" test.
  std::string const osxRoot = this->GetSafeGlobalSetting("CMAKE_OSX_SYSROOT");
  if (!osxRoot.empty()) {
    LocalEnvironment.emplace_back("SDKROOT=" + osxRoot);
  }

  auto const EnvOverrides =
    this->GetSafeGlobalSetting(FASTBUILD_ENV_OVERRIDES);

  if (!EnvOverrides.empty()) {
    auto const overrideEnvVar = [this](std::string const& prefix,
                                       std::string val) {
      auto const iter =
        std::find_if(LocalEnvironment.begin(), LocalEnvironment.end(),
                     [&prefix](std::string const& value) {
                       return cmSystemTools::StringStartsWith(value.c_str(),
                                                              prefix.c_str());
                     });
      if (iter != LocalEnvironment.end()) {
        *iter = std::move(val);
      } else {
        LocalEnvironment.emplace_back(std::move(val));
      }
    };
    for (auto const& val : cmList{ EnvOverrides }) {
      auto const pos = val.find('=');
      if (pos != std::string::npos && ((pos + 1) < val.size())) {
        overrideEnvVar(val.substr(0, pos + 1), val);
      }
    }
  }

  // Empty strings are not allowed.
  LocalEnvironment.erase(
    std::remove_if(LocalEnvironment.begin(), LocalEnvironment.end(),
                   [](std::string const& s) { return s.empty(); }),
    LocalEnvironment.end());
}

std::unique_ptr<cmGlobalGeneratorFactory>
cmGlobalFastbuildGenerator::NewFactory()