JUCE/extras/Introjucer/Source/Project Saving/jucer_ProjectExporter.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2013 - Raw Material Software Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#include "jucer_ProjectExporter.h"
#include "jucer_ProjectSaver.h"

#include "jucer_ProjectExport_Make.h"
#include "jucer_ProjectExport_MSVC.h"
#include "jucer_ProjectExport_XCode.h"
#include "jucer_ProjectExport_Android.h"
#include "jucer_ProjectExport_CodeBlocks.h"

//==============================================================================
StringArray ProjectExporter::getExporterNames()
{
    StringArray s;
    s.add (XCodeProjectExporter::getNameMac());
    s.add (XCodeProjectExporter::getNameiOS());
    s.add (MSVCProjectExporterVC2005::getName());
    s.add (MSVCProjectExporterVC2008::getName());
    s.add (MSVCProjectExporterVC2010::getName());
    s.add (MSVCProjectExporterVC2012::getName());
    s.add (MSVCProjectExporterVC2013::getName());
    s.add (MakefileProjectExporter::getNameLinux());
    s.add (AndroidProjectExporter::getNameAndroid());
    s.add (CodeBlocksProjectExporter::getNameCodeBlocks());
    return s;
}

String ProjectExporter::getCurrentPlatformExporterName()
{
   #if JUCE_MAC
    return XCodeProjectExporter::getNameMac();
   #elif JUCE_WINDOWS
    return MSVCProjectExporterVC2010::getName();
   #elif JUCE_LINUX
    return MakefileProjectExporter::getNameLinux();
   #else
    #error // huh?
   #endif
}

ProjectExporter* ProjectExporter::createNewExporter (Project& project, const int index)
{
    ProjectExporter* exp = nullptr;

    switch (index)
    {
        case 0:     exp = new XCodeProjectExporter      (project, ValueTree (XCodeProjectExporter     ::getValueTreeTypeName (false)), false); break;
        case 1:     exp = new XCodeProjectExporter      (project, ValueTree (XCodeProjectExporter     ::getValueTreeTypeName (true)), true); break;
        case 2:     exp = new MSVCProjectExporterVC2005 (project, ValueTree (MSVCProjectExporterVC2005::getValueTreeTypeName())); break;
        case 3:     exp = new MSVCProjectExporterVC2008 (project, ValueTree (MSVCProjectExporterVC2008::getValueTreeTypeName())); break;
        case 4:     exp = new MSVCProjectExporterVC2010 (project, ValueTree (MSVCProjectExporterVC2010::getValueTreeTypeName())); break;
        case 5:     exp = new MSVCProjectExporterVC2012 (project, ValueTree (MSVCProjectExporterVC2012::getValueTreeTypeName())); break;
        case 6:     exp = new MSVCProjectExporterVC2013 (project, ValueTree (MSVCProjectExporterVC2013::getValueTreeTypeName())); break;
        case 7:     exp = new MakefileProjectExporter   (project, ValueTree (MakefileProjectExporter  ::getValueTreeTypeName())); break;
        case 8:     exp = new AndroidProjectExporter    (project, ValueTree (AndroidProjectExporter   ::getValueTreeTypeName())); break;
        case 9:     exp = new CodeBlocksProjectExporter (project, ValueTree (CodeBlocksProjectExporter::getValueTreeTypeName())); break;

        default:    jassertfalse; return 0;
    }

    exp->createDefaultConfigs();
    exp->createDefaultModulePaths();

    return exp;
}

ProjectExporter* ProjectExporter::createNewExporter (Project& project, const String& name)
{
    return createNewExporter (project, getExporterNames().indexOf (name));
}

ProjectExporter* ProjectExporter::createExporter (Project& project, const ValueTree& settings)
{
    ProjectExporter*       exp = MSVCProjectExporterVC2005::createForSettings (project, settings);
    if (exp == nullptr)    exp = MSVCProjectExporterVC2008::createForSettings (project, settings);
    if (exp == nullptr)    exp = MSVCProjectExporterVC2010::createForSettings (project, settings);
    if (exp == nullptr)    exp = MSVCProjectExporterVC2012::createForSettings (project, settings);
    if (exp == nullptr)    exp = MSVCProjectExporterVC2013::createForSettings (project, settings);
    if (exp == nullptr)    exp = XCodeProjectExporter     ::createForSettings (project, settings);
    if (exp == nullptr)    exp = MakefileProjectExporter  ::createForSettings (project, settings);
    if (exp == nullptr)    exp = AndroidProjectExporter   ::createForSettings (project, settings);
    if (exp == nullptr)    exp = CodeBlocksProjectExporter::createForSettings (project, settings);

    jassert (exp != nullptr);
    return exp;
}

bool ProjectExporter::canProjectBeLaunched (Project* project)
{
    if (project != nullptr)
    {
        const char* types[] =
        {
           #if JUCE_MAC
            XCodeProjectExporter::getValueTreeTypeName (false),
            XCodeProjectExporter::getValueTreeTypeName (true),
           #elif JUCE_WINDOWS
            MSVCProjectExporterVC2005::getValueTreeTypeName(),
            MSVCProjectExporterVC2008::getValueTreeTypeName(),
            MSVCProjectExporterVC2010::getValueTreeTypeName(),
            MSVCProjectExporterVC2012::getValueTreeTypeName(),
            MSVCProjectExporterVC2013::getValueTreeTypeName(),
           #elif JUCE_LINUX
            // (this doesn't currently launch.. not really sure what it would do on linux)
            //MakefileProjectExporter::getValueTreeTypeName(),
           #endif

            nullptr
        };

        for (const char** type = types; *type != nullptr; ++type)
            if (project->getExporters().getChildWithName (*type).isValid())
                return true;
    }

    return false;
}

//==============================================================================
ProjectExporter::ProjectExporter (Project& p, const ValueTree& settings_)
    : xcodeIsBundle (false),
      xcodeCreatePList (false),
      xcodeCanUseDwarf (true),
      makefileIsDLL (false),
      msvcIsDLL (false),
      msvcIsWindowsSubsystem (true),
      settings (settings_),
      project (p),
      projectType (p.getProjectType()),
      projectName (p.getTitle()),
      projectFolder (p.getProjectFolder()),
      modulesGroup (nullptr)
{
}

ProjectExporter::~ProjectExporter()
{
}

File ProjectExporter::getTargetFolder() const
{
    return project.resolveFilename (getTargetLocationString());
}

RelativePath ProjectExporter::rebaseFromProjectFolderToBuildTarget (const RelativePath& path) const
{
    return path.rebased (project.getProjectFolder(), getTargetFolder(), RelativePath::buildTargetFolder);
}

bool ProjectExporter::shouldFileBeCompiledByDefault (const RelativePath& file) const
{
    return file.hasFileExtension ("cpp;cc;c;cxx");
}

void ProjectExporter::createPropertyEditors (PropertyListBuilder& props)
{
    props.add (new TextPropertyComponent (getTargetLocationValue(), "Target Project Folder", 1024, false),
               "The location of the folder in which the " + name + " project will be created. "
               "This path can be absolute, but it's much more sensible to make it relative to the jucer project directory.");

    OwnedArray<LibraryModule> modules;
    project.getModules().createRequiredModules (modules);

    for (int i = 0; i < modules.size(); ++i)
        modules.getUnchecked(i)->createPropertyEditors (*this, props);

    props.add (new TextPropertyComponent (getExporterPreprocessorDefs(), "Extra Preprocessor Definitions", 32768, true),
               "Extra preprocessor definitions. Use the form \"NAME1=value NAME2=value\", using whitespace, commas, "
               "or new-lines to separate the items - to include a space or comma in a definition, precede it with a backslash.");

    props.add (new TextPropertyComponent (getExtraCompilerFlags(), "Extra compiler flags", 2048, true),
               "Extra command-line flags to be passed to the compiler. This string can contain references to preprocessor definitions in the "
               "form ${NAME_OF_DEFINITION}, which will be replaced with their values.");

    props.add (new TextPropertyComponent (getExtraLinkerFlags(), "Extra linker flags", 2048, true),
               "Extra command-line flags to be passed to the linker. You might want to use this for adding additional libraries. "
               "This string can contain references to preprocessor definitions in the form ${NAME_OF_VALUE}, which will be replaced with their values.");

    props.add (new TextPropertyComponent (getExternalLibraries(), "External libraries to link", 2048, true),
               "Additional libraries to link (one per line). You should not add any platform specific decoration to these names. "
               "This string can contain references to preprocessor definitions in the form ${NAME_OF_VALUE}, which will be replaced with their values.");

    {
        OwnedArray<Project::Item> images;
        project.findAllImageItems (images);

        StringArray choices;
        Array<var> ids;

        choices.add ("<None>");
        ids.add (var::null);
        choices.add (String::empty);
        ids.add (var::null);

        for (int i = 0; i < images.size(); ++i)
        {
            choices.add (images.getUnchecked(i)->getName());
            ids.add (images.getUnchecked(i)->getID());
        }

        props.add (new ChoicePropertyComponent (getSmallIconImageItemID(), "Icon (small)", choices, ids),
                   "Sets an icon to use for the executable.");

        props.add (new ChoicePropertyComponent (getBigIconImageItemID(), "Icon (large)", choices, ids),
                   "Sets an icon to use for the executable.");
    }

    createExporterProperties (props);

    props.add (new TextPropertyComponent (getUserNotes(), "Notes", 32768, true),
               "Extra comments: This field is not used for code or project generation, it's just a space where you can express your thoughts.");
}

StringPairArray ProjectExporter::getAllPreprocessorDefs (const ProjectExporter::BuildConfiguration& config) const
{
    StringPairArray defs (mergePreprocessorDefs (config.getAllPreprocessorDefs(),
                                                 parsePreprocessorDefs (getExporterPreprocessorDefsString())));
    defs.set (getExporterIdentifierMacro(), "1");
    return defs;
}

StringPairArray ProjectExporter::getAllPreprocessorDefs() const
{
    StringPairArray defs (mergePreprocessorDefs (project.getPreprocessorDefs(),
                                                 parsePreprocessorDefs (getExporterPreprocessorDefsString())));
    defs.set (getExporterIdentifierMacro(), "1");
    return defs;
}

String ProjectExporter::replacePreprocessorTokens (const ProjectExporter::BuildConfiguration& config, const String& sourceString) const
{
    return replacePreprocessorDefs (getAllPreprocessorDefs (config), sourceString);
}

void ProjectExporter::copyMainGroupFromProject()
{
    jassert (itemGroups.size() == 0);
    itemGroups.add (project.getMainGroup().createCopy());
}

Project::Item& ProjectExporter::getModulesGroup()
{
    if (modulesGroup == nullptr)
    {
        jassert (itemGroups.size() > 0); // must call copyMainGroupFromProject before this.
        itemGroups.add (Project::Item::createGroup (project, "Juce Modules", "__modulesgroup__"));
        modulesGroup = &(itemGroups.getReference (itemGroups.size() - 1));
    }

    return *modulesGroup;
}

void ProjectExporter::addToExtraSearchPaths (const RelativePath& pathFromProjectFolder)
{
    RelativePath localPath (rebaseFromProjectFolderToBuildTarget (pathFromProjectFolder));

    const String path (isVisualStudio() ? localPath.toWindowsStyle() : localPath.toUnixStyle());
    extraSearchPaths.addIfNotAlreadyThere (path, false);
}

Value ProjectExporter::getPathForModuleValue (const String& moduleID)
{
    UndoManager* um = project.getUndoManagerFor (settings);

    ValueTree paths (settings.getOrCreateChildWithName (Ids::MODULEPATHS, um));
    ValueTree m (paths.getChildWithProperty (Ids::ID, moduleID));

    if (! m.isValid())
    {
        m = ValueTree (Ids::MODULEPATH);
        m.setProperty (Ids::ID, moduleID, um);
        paths.addChild (m, -1, um);
    }

    return m.getPropertyAsValue (Ids::path, um);
}

String ProjectExporter::getPathForModuleString (const String& moduleID) const
{
    return settings.getChildWithName (Ids::MODULEPATHS)
                .getChildWithProperty (Ids::ID, moduleID) [Ids::path].toString();
}

void ProjectExporter::removePathForModule (const String& moduleID)
{
    ValueTree paths (settings.getChildWithName (Ids::MODULEPATHS));
    ValueTree m (paths.getChildWithProperty (Ids::ID, moduleID));
    paths.removeChild (m, project.getUndoManagerFor (settings));
}

RelativePath ProjectExporter::getModuleFolderRelativeToProject (const String& moduleID, ProjectSaver& projectSaver) const
{
    if (project.getModules().shouldCopyModuleFilesLocally (moduleID).getValue())
        return RelativePath (project.getRelativePathForFile (projectSaver.getLocalModuleFolder (moduleID)),
                             RelativePath::projectFolder);

    String path (getPathForModuleString (moduleID));

    if (path.isEmpty())
        return getLegacyModulePath (moduleID).getChildFile (moduleID);

    return RelativePath (path, RelativePath::projectFolder).getChildFile (moduleID);
}

String ProjectExporter::getLegacyModulePath() const
{
    return getSettingString ("juceFolder");
}

RelativePath ProjectExporter::getLegacyModulePath (const String& moduleID) const
{
    if (project.getModules().state.getChildWithProperty (Ids::ID, moduleID) ["useLocalCopy"])
        return RelativePath (project.getRelativePathForFile (project.getGeneratedCodeFolder()
                                                                .getChildFile ("modules")
                                                                .getChildFile (moduleID)), RelativePath::projectFolder);

    String oldJucePath (getLegacyModulePath());

    if (oldJucePath.isEmpty())
        return RelativePath();

    RelativePath p (oldJucePath, RelativePath::projectFolder);
    if (p.getFileName() != "modules")
        p = p.getChildFile ("modules");

    return p.getChildFile (moduleID);
}

void ProjectExporter::updateOldModulePaths()
{
    String oldPath (getLegacyModulePath());

    if (oldPath.isNotEmpty())
    {
        for (int i = project.getModules().getNumModules(); --i >= 0;)
        {
            String modID (project.getModules().getModuleID(i));
            getPathForModuleValue (modID) = getLegacyModulePath (modID).getParentDirectory().toUnixStyle();
        }

        settings.removeProperty ("juceFolder", nullptr);
    }
}

static bool areCompatibleExporters (const ProjectExporter& p1, const ProjectExporter& p2)
{
    return (p1.isVisualStudio() && p2.isVisualStudio())
        || (p1.isXcode() && p2.isXcode())
        || (p1.isLinux() && p2.isLinux())
        || (p1.isAndroid() && p2.isAndroid())
        || (p1.isCodeBlocks() && p2.isCodeBlocks());
}

void ProjectExporter::createDefaultModulePaths()
{
    for (Project::ExporterIterator exporter (project); exporter.next();)
    {
        if (areCompatibleExporters (*this, *exporter))
        {
            for (int i = project.getModules().getNumModules(); --i >= 0;)
            {
                String modID (project.getModules().getModuleID(i));
                getPathForModuleValue (modID) = exporter->getPathForModuleValue (modID).getValue();
            }

            return;
        }
    }

    for (Project::ExporterIterator exporter (project); exporter.next();)
    {
        if (exporter->canLaunchProject())
        {
            for (int i = project.getModules().getNumModules(); --i >= 0;)
            {
                String modID (project.getModules().getModuleID(i));
                getPathForModuleValue (modID) = exporter->getPathForModuleValue (modID).getValue();
            }

            return;
        }
    }

    for (int i = project.getModules().getNumModules(); --i >= 0;)
    {
        String modID (project.getModules().getModuleID(i));
        getPathForModuleValue (modID) = "../../juce";
    }
}

//==============================================================================
ValueTree ProjectExporter::getConfigurations() const
{
    return settings.getChildWithName (Ids::CONFIGURATIONS);
}

int ProjectExporter::getNumConfigurations() const
{
    return getConfigurations().getNumChildren();
}

ProjectExporter::BuildConfiguration::Ptr ProjectExporter::getConfiguration (int index) const
{
    return createBuildConfig (getConfigurations().getChild (index));
}

bool ProjectExporter::hasConfigurationNamed (const String& nameToFind) const
{
    const ValueTree configs (getConfigurations());
    for (int i = configs.getNumChildren(); --i >= 0;)
        if (configs.getChild(i) [Ids::name].toString() == nameToFind)
            return true;

    return false;
}

String ProjectExporter::getUniqueConfigName (String nm) const
{
    String nameRoot (nm);
    while (CharacterFunctions::isDigit (nameRoot.getLastCharacter()))
        nameRoot = nameRoot.dropLastCharacters (1);

    nameRoot = nameRoot.trim();

    int suffix = 2;
    while (hasConfigurationNamed (name))
        nm = nameRoot + " " + String (suffix++);

    return nm;
}

void ProjectExporter::addNewConfiguration (const BuildConfiguration* configToCopy)
{
    const String configName (getUniqueConfigName (configToCopy != nullptr ? configToCopy->config [Ids::name].toString()
                                                                          : "New Build Configuration"));

    ValueTree configs (getConfigurations());

    if (! configs.isValid())
    {
        settings.addChild (ValueTree (Ids::CONFIGURATIONS), 0, project.getUndoManagerFor (settings));
        configs = getConfigurations();
    }

    ValueTree newConfig (Ids::CONFIGURATION);
    if (configToCopy != nullptr)
        newConfig = configToCopy->config.createCopy();

    newConfig.setProperty (Ids::name, configName, 0);

    configs.addChild (newConfig, -1, project.getUndoManagerFor (configs));
}

void ProjectExporter::BuildConfiguration::removeFromExporter()
{
    ValueTree configs (config.getParent());
    configs.removeChild (config, project.getUndoManagerFor (configs));
}

void ProjectExporter::createDefaultConfigs()
{
    settings.getOrCreateChildWithName (Ids::CONFIGURATIONS, nullptr);

    for (int i = 0; i < 2; ++i)
    {
        addNewConfiguration (nullptr);
        BuildConfiguration::Ptr config (getConfiguration (i));

        const bool debugConfig = i == 0;

        config->getNameValue() = debugConfig ? "Debug" : "Release";
        config->isDebugValue() = debugConfig;
        config->getOptimisationLevel() = debugConfig ? optimisationOff : optimiseMinSize;
        config->getTargetBinaryName() = project.getProjectFilenameRoot();
    }
}

Image ProjectExporter::getBigIcon() const
{
    return project.getMainGroup().findItemWithID (settings [Ids::bigIcon]).loadAsImageFile();
}

Image ProjectExporter::getSmallIcon() const
{
    return project.getMainGroup().findItemWithID (settings [Ids::smallIcon]).loadAsImageFile();
}

Image ProjectExporter::getBestIconForSize (int size, bool returnNullIfNothingBigEnough) const
{
    Image im;

    const Image im1 (getSmallIcon());
    const Image im2 (getBigIcon());

    if (im1.isValid() && im2.isValid())
    {
        if (im1.getWidth() >= size && im2.getWidth() >= size)
            im = im1.getWidth() < im2.getWidth() ? im1 : im2;
        else if (im1.getWidth() >= size)
            im = im1;
        else if (im2.getWidth() >= size)
            im = im2;
        else
            return Image::null;
    }
    else
    {
        im = im1.isValid() ? im1 : im2;
    }

    if (returnNullIfNothingBigEnough && im.getWidth() < size && im.getHeight() < size)
        return Image::null;

    return rescaleImageForIcon (im, size);
}

Image ProjectExporter::rescaleImageForIcon (Image im, const int size)
{
    im = SoftwareImageType().convert (im);

    if (size == im.getWidth() && size == im.getHeight())
        return im;

    // (scale it down in stages for better resampling)
    while (im.getWidth() > 2 * size && im.getHeight() > 2 * size)
        im = im.rescaled (im.getWidth() / 2,
                          im.getHeight() / 2);

    Image newIm (Image::ARGB, size, size, true, SoftwareImageType());
    Graphics g (newIm);
    g.drawImageWithin (im, 0, 0, size, size,
                       RectanglePlacement::centred | RectanglePlacement::onlyReduceInSize, false);
    return newIm;
}


//==============================================================================
ProjectExporter::ConfigIterator::ConfigIterator (ProjectExporter& exporter_)
    : index (-1), exporter (exporter_)
{
}

bool ProjectExporter::ConfigIterator::next()
{
    if (++index >= exporter.getNumConfigurations())
        return false;

    config = exporter.getConfiguration (index);
    return true;
}

ProjectExporter::ConstConfigIterator::ConstConfigIterator (const ProjectExporter& exporter_)
    : index (-1), exporter (exporter_)
{
}

bool ProjectExporter::ConstConfigIterator::next()
{
    if (++index >= exporter.getNumConfigurations())
        return false;

    config = exporter.getConfiguration (index);
    return true;
}

//==============================================================================
ProjectExporter::BuildConfiguration::BuildConfiguration (Project& p, const ValueTree& configNode)
   : config (configNode), project (p)
{
}

ProjectExporter::BuildConfiguration::~BuildConfiguration()
{
}

String ProjectExporter::BuildConfiguration::getGCCOptimisationFlag() const
{
    switch (getOptimisationLevelInt())
    {
        case optimiseMaxSpeed:  return "3";
        case optimiseMinSize:   return "s";
        default:                return "0";
    }
}

void ProjectExporter::BuildConfiguration::createPropertyEditors (PropertyListBuilder& props)
{
    props.add (new TextPropertyComponent (getNameValue(), "Name", 96, false),
               "The name of this configuration.");

    props.add (new BooleanPropertyComponent (isDebugValue(), "Debug mode", "Debugging enabled"),
               "If enabled, this means that the configuration should be built with debug synbols.");

    static const char* optimisationLevels[] = { "No optimisation", "Minimise size", "Maximise speed", 0 };
    const int optimisationLevelValues[]     = { optimisationOff, optimiseMinSize, optimiseMaxSpeed, 0 };
    props.add (new ChoicePropertyComponent (getOptimisationLevel(), "Optimisation",
                                            StringArray (optimisationLevels), Array<var> (optimisationLevelValues)),
               "The optimisation level for this configuration");

    props.add (new TextPropertyComponent (getTargetBinaryName(), "Binary name", 256, false),
               "The filename to use for the destination binary executable file. If you don't add a suffix to this name, "
               "a suitable platform-specific suffix will be added automatically.");

    props.add (new TextPropertyComponent (getTargetBinaryRelativePath(), "Binary location", 1024, false),
               "The folder in which the finished binary should be placed. Leave this blank to cause the binary to be placed "
               "in its default location in the build folder.");

    props.addSearchPathProperty (getHeaderSearchPathValue(), "Header search paths", "Extra header search paths.");
    props.addSearchPathProperty (getLibrarySearchPathValue(), "Extra library search paths", "Extra library search paths.");

    props.add (new TextPropertyComponent (getBuildConfigPreprocessorDefs(), "Preprocessor definitions", 32768, true),
               "Extra preprocessor definitions. Use the form \"NAME1=value NAME2=value\", using whitespace, commas, or "
               "new-lines to separate the items - to include a space or comma in a definition, precede it with a backslash.");

    createConfigProperties (props);

    props.add (new TextPropertyComponent (getUserNotes(), "Notes", 32768, true),
               "Extra comments: This field is not used for code or project generation, it's just a space where you can express your thoughts.");
}

StringPairArray ProjectExporter::BuildConfiguration::getAllPreprocessorDefs() const
{
    return mergePreprocessorDefs (project.getPreprocessorDefs(),
                                  parsePreprocessorDefs (getBuildConfigPreprocessorDefsString()));
}

StringArray ProjectExporter::BuildConfiguration::getHeaderSearchPaths() const
{
    return getSearchPathsFromString (getHeaderSearchPathString());
}

StringArray ProjectExporter::BuildConfiguration::getLibrarySearchPaths() const
{
    return getSearchPathsFromString (getLibrarySearchPathString());
}

String ProjectExporter::BuildConfiguration::getGCCLibraryPathFlags() const
{
    String s;
    const StringArray libraryPaths (getLibrarySearchPaths());

    for (int i = 0; i < libraryPaths.size(); ++i)
        s << " -L" << addQuotesIfContainsSpaces (libraryPaths[i]);

    return s;
}

String ProjectExporter::getExternalLibraryFlags (const BuildConfiguration& config) const
{
    StringArray libraries;
    libraries.addTokens (getExternalLibrariesString(), ";\n", "\"'");
    libraries.removeEmptyStrings (true);

    if (libraries.size() != 0)
        return replacePreprocessorTokens (config, "-l" + libraries.joinIntoString (" -l")).trim();

    return String::empty;
}