/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the qmake application of the Qt Toolkit.
**
** Copyright (C) 2009 netlabs.org. OS/2 parts.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "gnumake.h"
#include "option.h"
#include "meta.h"
#include <qregexp.h>
#include <qdir.h>
#include <stdlib.h>
#include <time.h>

QT_BEGIN_NAMESPACE

GNUMakefileGenerator::GNUMakefileGenerator() : Win32MakefileGenerator(), init_flag(false)
{
    if (isDosLikeShell())
        quote = "\"";
    else
        quote = "'";
}

bool GNUMakefileGenerator::isDosLikeShell() const
{
#ifdef Q_OS_OS2
    return Option::shellPath.isEmpty();
#else
    return Win32MakefileGenerator::isDosLikeShell();
#endif
}

QString GNUMakefileGenerator::escapeFilePath(const QString &path) const
{
    QString ret = path;
    if (!isDosLikeShell()) {
        ret.remove('\"');
        ret.replace('\\', "/");
        ret.replace(' ', "\\ ");
    } else {
        ret = Option::fixPathToTargetOS(ret, false);
        ret.replace(QRegExp("\""), "");
        ret.replace(QRegExp("[\\\\/]$"), "");
        if (ret.contains(QRegExp("[ +&;%]")))
            ret = quote + ret + quote;
    }
    return ret;
}

QString GNUMakefileGenerator::escapeDependencyPath(const QString &path) const
{
    // dependency escaping is always done Unix-way since this is a requirement
    // of GNU make which allows " and ' to be part of the file name.
    // Note that if the string is a make variable reference, we don't eascape!
    QString ret = path;
    QString trimmed = path.trimmed();
    if (!trimmed.startsWith("$(") || !trimmed.endsWith(")")) {
        ret.remove('\"');
        ret.replace(' ', "\\ ");
    }
    return ret;
}

QString
GNUMakefileGenerator::findBestVersion(const QString &d, const QString &stem, const QString &ext)
{
    QString bd = Option::fixPathToLocalOS(d, true);
    if(!exists(bd))
        return QString();

    QString dllStem = stem + QTDLL_POSTFIX;

    QString versionOverride;
    if(!project->values("QMAKE_" + stem.toUpper() + "_VERSION_OVERRIDE").isEmpty())
        versionOverride = project->values("QMAKE_" + stem.toUpper() + "_VERSION_OVERRIDE").first();

    if (project->isActiveConfig("link_prl")) {
        QMakeMetaInfo libinfo;
        QString libfile = QMakeMetaInfo::findLib(bd + Option::dir_sep + dllStem);
        if (project->values("QMAKE_PRL_INTERNAL_FILES").contains(libfile)) {
            // already processed, return emtpy string to discard this lib
            return QString("");
        }
        if (libinfo.readLib(libfile)) {
            project->values("QMAKE_PRL_INTERNAL_FILES") += libfile;
            QString target = libinfo.first("QMAKE_PRL_TARGET");
            if (target == project->first("TARGET")) {
                // circular reference to ourselves, return emtpy string to discard this lib
                return QString("");
            }
            if (target.isEmpty())
                target = dllStem;
            if (!versionOverride.isEmpty())
                target += versionOverride;
            else if (!libinfo.values("QMAKE_PRL_CONFIG").contains("staticlib") &&
                     !libinfo.isEmpty("QMAKE_PRL_VERSION"))
                target += libinfo.first("QMAKE_PRL_VERSION").replace(".", "");

            const QStringList &in = libinfo.values("QMAKE_PRL_LIBS");
            QStringList &out = project->values("QMAKE_PRL_LIBS");
            for (QStringList::ConstIterator it = in.begin(); it != in.end(); ++it) {
                if (!out.contains(*it))
                    out.append((*it));
            }
            return target;
        }
    }

    if (!versionOverride.isEmpty())
        return stem + versionOverride;

    int biggest = -1;
    if(!project->isActiveConfig("no_versionlink")) {
        QDir dir(bd);
        QStringList entries = dir.entryList();
        QRegExp regx(QString("((lib)?%1([0-9]*))(%2)$").arg(dllStem).arg(ext), Qt::CaseInsensitive);
        for(QStringList::Iterator it = entries.begin(); it != entries.end(); ++it) {
            if(regx.exactMatch((*it))) {
				if (!regx.cap(3).isEmpty()) {
					bool ok = true;
					int num = regx.cap(3).toInt(&ok);
					biggest = qMax(biggest, (!ok ? -1 : num));
				}
			}
        }
    }
    if (biggest != -1)
        return stem + QString::number(biggest);

    return QString();
}

bool GNUMakefileGenerator::findLibraries()
{
    QStringList &l = project->values("QMAKE_LIBS");

    QList<QMakeLocalFileName> dirs;
    {
        QStringList &libpaths = project->values("QMAKE_LIBDIR");
        for(QStringList::Iterator libpathit = libpaths.begin();
            libpathit != libpaths.end(); ++libpathit)
            dirs.append(QMakeLocalFileName((*libpathit)));
    }

    QStringList::Iterator it = l.begin();

    do {
        project->values("QMAKE_PRL_LIBS").clear();
        bool erase = false;
        for (; it != l.end(); erase ? (erase = false, it = l.erase(it)) : ++it) {
            if((*it).startsWith("-L")) {
                dirs.append(QMakeLocalFileName((*it).mid(2)));
            } else {
                QString stem = *it, out;

                if (stem.startsWith("-l"))
                    stem = stem.mid(2);

                QString suffix;
                if (!project->isEmpty("QMAKE_" + stem.toUpper() + "_SUFFIX"))
                    suffix = project->first("QMAKE_" + stem.toUpper() + "_SUFFIX");
                for (QList<QMakeLocalFileName>::Iterator dir_it = dirs.begin(); dir_it != dirs.end(); ++dir_it) {
                    QString best = findBestVersion((*dir_it).local(), stem,
                                                   QString("%1.lib").arg(suffix));
                    if (!best.isNull()) {
                        if (best.isEmpty()) {
                            // we are asked to discard this lib, do it
                            erase = true;
                            break;
                        }
                        out = best.prepend("-l");
                        break;
                    }
                }
                if (!out.isEmpty()) // We assume if it never finds it then its correct
                    if (!project->values("QMAKE_LIBS").contains(out))
                        (*it) = out;
            }
        }

        // add the libraries from PRL and process them normally
        QStringList l2 = project->values("QMAKE_PRL_LIBS");
        int oldSize = l.size();
        for (QStringList::ConstIterator it2 = l2.begin(); it2 != l2.end(); ++it2) {
            if (!l.contains(*it2))
                l.append(*it2);
        }
        it = l.begin() + oldSize;

    } while(it != l.end());

    return true;
}

bool GNUMakefileGenerator::writeMakefile(QTextStream &t)
{
    writeHeader(t);

    /* function to convert from DOS-like to Unix-like space escaping in file
     * names */
    t << "null :=" << endl << "space := $(null) # end of the line" << endl;
    t << "# function to change DOS-like space escaping to Unix-like" << endl;
    t << "q = $(subst %,\\%,$(subst ;,\\;,$(subst &,\\&,"
         "$(subst +,\\+,$(subst $(space),\\ ,$(subst \",,$(1)))))))" << endl << endl;

    if(!project->values("QMAKE_FAILED_REQUIREMENTS").isEmpty()) {
        t << "all clean:" << "\n\t"
          << "@echo \"Some of the required modules ("
          << var("QMAKE_FAILED_REQUIREMENTS") << ") are not available.\"" << "\n\t"
          << "@echo \"Skipped.\"" << endl << endl;
        writeMakeQmake(t);
        return true;
    }

    if(project->first("TEMPLATE") == "app" ||
       project->first("TEMPLATE") == "lib") {
        if(Option::mkfile::do_stub_makefile) {
            t << "QMAKE    = "        << (project->isEmpty("QMAKE_QMAKE") ? QString("qmake") : var("QMAKE_QMAKE")) << endl;
            QStringList &qut = project->values("QMAKE_EXTRA_TARGETS");
            for(QStringList::ConstIterator it = qut.begin(); it != qut.end(); ++it)
                t << *it << " ";
            t << "first all clean install distclean uninstall: qmake" << endl
              << "qmake_all:" << endl;
            writeMakeQmake(t);
            if(project->isEmpty("QMAKE_NOFORCE"))
                t << "FORCE:" << endl << endl;
            return true;
        }
        writeGNUParts(t);
        return MakefileGenerator::writeMakefile(t);
    }
    else if(project->first("TEMPLATE") == "subdirs") {
        writeSubDirs(t);
        return true;
    }
    return false;
 }

void GNUMakefileGenerator::writeGNUParts(QTextStream &t)
{
    t << "QMAKESPECDIR  = " << escapeFilePath(specdir()) << endl;

    QString ofile = escapeFilePath(Option::output.fileName());
    if(ofile.lastIndexOf(Option::dir_sep) != -1)
        ofile = ofile.right(ofile.length() - ofile.lastIndexOf(Option::dir_sep) -1);
    t << "MAKEFILE      = " << ofile << endl << endl;

    writeStandardParts(t);

    if (!preCompHeaderOut.isEmpty()) {
        QString header = project->first("PRECOMPILED_HEADER");
        QString cHeader = preCompHeaderOut + Option::dir_sep + "c";
        t << escapeDependencyPath(cHeader) << ": " << escapeDependencyPath(header) << " "
            << escapeDependencyPaths(findDependencies(header)).join(" \\\n\t\t")
            << "\n\t" << mkdir_p_asstring(preCompHeaderOut)
            << "\n\t" << "$(CC) -x c-header -c $(CFLAGS) $(INCPATH) -o " << cHeader << " " << header
            << endl << endl;
        QString cppHeader = preCompHeaderOut + Option::dir_sep + "c++";
        t << escapeDependencyPath(cppHeader) << ": " << escapeDependencyPath(header) << " "
            << escapeDependencyPaths(findDependencies(header)).join(" \\\n\t\t")
            << "\n\t" << mkdir_p_asstring(preCompHeaderOut)
            << "\n\t" << "$(CXX) -x c++-header -c $(CXXFLAGS) $(INCPATH) -o " << cppHeader << " " << header
            << endl << endl;
    }
}

void GNUMakefileGenerator::init()
{
    if(init_flag)
        return;
    init_flag = true;

    if(project->first("TEMPLATE") == "app") {
        mode = App;
        project->values("QMAKE_APP_FLAG").append("1");
    } else if(project->first("TEMPLATE") == "lib") {
        mode = project->isActiveConfig("staticlib") ? StaticLib : DLL;
        project->values("QMAKE_LIB_FLAG").append("1");
    } else if(project->first("TEMPLATE") == "subdirs") {
        MakefileGenerator::init();
        if(project->isEmpty("QMAKE_COPY_FILE"))
            project->values("QMAKE_COPY_FILE").append("$(COPY)");
        if(project->isEmpty("QMAKE_COPY_DIR"))
            project->values("QMAKE_COPY_DIR").append("$(COPY)");
        if(project->isEmpty("QMAKE_INSTALL_FILE"))
            project->values("QMAKE_INSTALL_FILE").append("$(COPY_FILE)");
        if(project->isEmpty("QMAKE_INSTALL_PROGRAM"))
            project->values("QMAKE_INSTALL_PROGRAM").append("$(COPY_FILE)");
        if(project->isEmpty("QMAKE_INSTALL_DIR"))
            project->values("QMAKE_INSTALL_DIR").append("$(COPY_DIR)");
        if(project->values("MAKEFILE").isEmpty())
            project->values("MAKEFILE").append("Makefile");
        if(project->values("QMAKE_QMAKE").isEmpty())
            project->values("QMAKE_QMAKE").append("qmake");
        return;
    }

    project->values("TARGET_PRL").append(project->first("TARGET"));

    processVars();

    // LIBS defined in Profile comes first for gcc
    project->values("QMAKE_LIBS") += escapeFilePaths(project->values("LIBS"));

    QStringList &configs = project->values("CONFIG");

    if(project->isActiveConfig("qt_dll"))
        if(configs.indexOf("qt") == -1)
            configs.append("qt");

    if(project->isActiveConfig("dll")) {
        QString destDir = "";
        if(!project->first("DESTDIR").isEmpty())
            destDir = Option::fixPathToTargetOS(project->first("DESTDIR") + Option::dir_sep, false, false);
    }

    MakefileGenerator::init();

    // precomp
    if (!project->first("PRECOMPILED_HEADER").isEmpty()
        && project->isActiveConfig("precompile_header")) {
        QString preCompHeader = var("PRECOMPILED_DIR")
		         + QFileInfo(project->first("PRECOMPILED_HEADER")).fileName();
        preCompHeaderOut = preCompHeader + ".gch";
        project->values("QMAKE_CLEAN").append(preCompHeaderOut + Option::dir_sep + "c");
        project->values("QMAKE_CLEAN").append(preCompHeaderOut + Option::dir_sep + "c++");

        project->values("QMAKE_RUN_CC").clear();
	    project->values("QMAKE_RUN_CC").append("$(CC) -c -include " + preCompHeader +
                                               " $(CFLAGS) $(INCPATH) -o $obj $src");
        project->values("QMAKE_RUN_CC_IMP").clear();
        project->values("QMAKE_RUN_CC_IMP").append("$(CC)  -c -include " + preCompHeader +
                                                   " $(CFLAGS) $(INCPATH) -o $@ $<");
        project->values("QMAKE_RUN_CXX").clear();
        project->values("QMAKE_RUN_CXX").append("$(CXX) -c -include " + preCompHeader +
                                                " $(CXXFLAGS) $(INCPATH) -o $obj $src");
        project->values("QMAKE_RUN_CXX_IMP").clear();
        project->values("QMAKE_RUN_CXX_IMP").append("$(CXX) -c -include " + preCompHeader +
                                                    " $(CXXFLAGS) $(INCPATH) -o $@ $<");
    }
}

void GNUMakefileGenerator::fixTargetExt()
{
    if (mode == App)
        project->values("TARGET_EXT").append(".exe");
    else if (mode == DLL)
        project->values("TARGET_EXT").append(project->first("TARGET_VERSION_EXT") + ".dll");
    else
        project->values("TARGET_EXT").append(".lib");
}

void GNUMakefileGenerator::writeIncPart(QTextStream &t)
{
    t << "INCPATH       =";

    QString opt = var("QMAKE_CFLAGS_INCDIR");
    QStringList &incs = project->values("INCLUDEPATH");
    QString incsSemicolon;
    for(QStringList::Iterator incit = incs.begin(); incit != incs.end(); ++incit) {
        QString inc = escapeFilePath(*incit);
        t << " " << opt << inc;
        incsSemicolon += inc + Option::dirlist_sep;
    }
    t << " " << opt << "$(QMAKESPECDIR)" << endl;
    incsSemicolon += "$(QMAKESPECDIR)";
    t << "INCLUDEPATH   = " << incsSemicolon << endl;
    /* createCompilerResponseFiles() will need QAKESPECDIR expanded) */
    project->values("INCLUDEPATH").append(specdir());
}

void GNUMakefileGenerator::writeLibsPart(QTextStream &t)
{
    if (mode == StaticLib) {
        t << "LIB           = " << var("QMAKE_LIB") << endl;
    } else {
        t << "LINK          = " << var("QMAKE_LINK") << endl;
        t << "LFLAGS        = " << var("QMAKE_LFLAGS") << endl;
        t << "LIBS          =";
        if(!project->values("QMAKE_LIBDIR").isEmpty())
            writeLibDirPart(t);
        QString opt = var("QMAKE_LFLAGS_LIB");
        QString optL = var("QMAKE_LFLAGS_LIBDIR");
        QStringList libs = project->values("QMAKE_LIBS");
        for(QStringList::Iterator it = libs.begin(); it != libs.end(); ++it) {
            QString lib = escapeFilePath(*it);
            /* lib may be prefixed with -l which is commonly used in e.g. PRF
             * (feature) files on all platforms; remove it before prepending
             * the compiler-specific option. There is even more weird case
             * when LIBS contains library paths prefixed with -L; we detect
             * this as well and replace it with the proper option. */
            if (lib.startsWith("-L")) {
                lib = lib.mid(2);
                t << " " << optL << lib;
            } else {
                if (lib.startsWith("-l"))
                    lib = lib.mid(2);
                t << " " << opt << lib;
            }
        }
        t << endl;
    }
}

void GNUMakefileGenerator::writeLibDirPart(QTextStream &t)
{
    QString opt = var("QMAKE_LFLAGS_LIBDIR");
    QStringList libDirs = project->values("QMAKE_LIBDIR");
    for(QStringList::Iterator it = libDirs.begin(); it != libDirs.end(); ++it) {
        QString libDir = escapeFilePath(*it);
        /* libDir may be prefixed with -L which is commonly used in e.g. PRF
         * (feature) files on all platforms; remove it before prepending
         * the compiler-specific option */
        if (libDir.startsWith("-L"))
            libDir = libDir.mid(2);
        t << " " << opt << libDir;
    }
}

void GNUMakefileGenerator::writeObjectsPart(QTextStream &t)
{
    Win32MakefileGenerator::writeObjectsPart(t);
    createLinkerResponseFiles(t);

    /* this function is a nice place to also handle compiler options response
     * files */
    createCompilerResponseFiles(t);
}

void GNUMakefileGenerator::writeBuildRulesPart(QTextStream &t)
{
    t << "first: all" << endl;
    t << "all: " << escapeDependencyPath(fileFixify(Option::output.fileName())) << " " << valGlue(escapeDependencyPaths(project->values("ALL_DEPS"))," "," "," ") << escapeFileVars(" $(DESTDIR_TARGET)") << endl << endl;
    t << escapeFileVars("$(DESTDIR_TARGET): ") << var("PRE_TARGETDEPS") << " $(OBJECTS) " << var("POST_TARGETDEPS");
    if (!project->isEmpty("QMAKE_PRE_LINK"))
        t << "\n\t" <<var("QMAKE_PRE_LINK");
    if (mode == StaticLib) {
        /* static library */
        t << "\n\t" << var("QMAKE_RUN_LIB");
    } else {
        /* application or DLL */
        t << "\n\t" << var("QMAKE_RUN_LINK");
        if (!project->isEmpty("RES_FILE") && !project->isEmpty("QMAKE_RUN_RC2EXE")) {
            t << "\n\t" << var("QMAKE_RUN_RC2EXE");
        }
    }
    if(!project->isEmpty("QMAKE_POST_LINK"))
        t << "\n\t" <<var("QMAKE_POST_LINK");
    t << endl;
}

void GNUMakefileGenerator::writeRcAndDefVariables(QTextStream &t)
{
    if (!project->isEmpty("RC_FILE")) {
        t << "RC_FILE       = " << escapeFilePath(var("RC_FILE")) << endl;
    }
    if (!project->isEmpty("RES_FILE")) {
        t << "RES_FILE      = " << valList(escapeFilePaths(project->values("RES_FILE"))) << endl;
    }

    if (project->isEmpty("DEF_FILE")) {
        /* no DEF file supplied, we will generate one */
        if (mode == DLL) {
            t << "DEF_FILE      = $(basename $(DESTDIR_TARGET)).def" << endl;
            project->values("QMAKE_CLEAN").append("$(DEF_FILE)");
            project->values("POST_TARGETDEPS") += escapeFileVars("$(DEF_FILE)");
            if (!project->isEmpty("DEF_FILE_TEMPLATE")) {
                t << "DEF_FILE_TEMPLATE = " << escapeFilePath(var("DEF_FILE_TEMPLATE")) << endl;
                project->values("QMAKE_GENDEF_DEPS") += escapeFileVars("$(DEF_FILE_TEMPLATE)");
            }
            if (!project->isEmpty("DEF_FILE_MAP")) {
                t << "DEF_FILE_MAP  = " << escapeFilePath(var("DEF_FILE_MAP")) << endl;
                project->values("QMAKE_GENDEF_DEPS") += escapeFileVars("$(DEF_FILE_MAP)");
            }
        }
    } else {
        if (!project->isEmpty("DEF_FILE_TEMPLATE")) {
            fprintf(stderr, "Both DEF_FILE and DEF_FILE_TEMPLATE are specified.\n");
            fprintf(stderr, "Please specify one of them, not both.");
            exit(1);
        }
        t << "DEF_FILE      = " << escapeFilePath(var("DEF_FILE")) << endl;
        project->values("POST_TARGETDEPS") += escapeFileVars("$(DEF_FILE)");
    }

    if (mode == DLL && !project->isEmpty("QMAKE_RUN_IMPLIB")) {
        t << "TARGET_IMPLIB = $(basename $(DESTDIR_TARGET)).lib" << endl;
        project->values("QMAKE_CLEAN").append("$(TARGET_IMPLIB)");
        project->values("POST_TARGETDEPS") += escapeFileVars("$(TARGET_IMPLIB)");
    }
}

void GNUMakefileGenerator::writeRcAndDefPart(QTextStream &t)
{
    if (!project->isEmpty("RC_FILE") && !project->isEmpty("RES_FILE") &&
        !project->isEmpty("QMAKE_RUN_RC2RES")) {
        t << escapeFileVars("$(RES_FILE): $(RC_FILE)\n\t");
        t << var("QMAKE_RUN_RC2RES") << endl;
    }

    if (mode == DLL) {
        if (project->isEmpty("DEF_FILE")) {
            /* generate a DEF file for the DLL when not supplied */
            t << escapeFileVars("$(DEF_FILE): ") << var("QMAKE_GENDEF_DEPS");
            t << valGlue(var("QMAKE_RUN_GENDEF").split(";;"), "\n\t", "\n\t", "") << endl;
        }
        if (!project->isEmpty("QMAKE_RUN_IMPLIB")) {
            /* generate the import library */
            t << escapeFileVars("$(TARGET_IMPLIB): ") << escapeFileVars("$(DEF_FILE)");
            t << "\n\t" << var("QMAKE_RUN_IMPLIB") << endl;
        }
    }
}

void GNUMakefileGenerator::processRcFileVar()
{
    if (Option::qmake_mode == Option::QMAKE_GENERATE_NOTHING)
        return;

    if (!project->isEmpty("RC_FILE")) {
        if (!project->isEmpty("RES_FILE")) {
            fprintf(stderr, "Both rc and res file specified.\n");
            fprintf(stderr, "Please specify one of them, not both.");
            exit(1);
        }
    	project->values("RES_FILE").prepend(escapeFilePath(QString("$(OBJECTS_DIR)") +
                                                           QDir::separator() +
                                                           QFileInfo(var("RC_FILE")).baseName() +
                                                           ".res"));
    	project->values("CLEAN_FILES") += "$(RES_FILE)";
    }

    if (!project->isEmpty("RES_FILE"))
        project->values("POST_TARGETDEPS") += escapeFileVars("$(RES_FILE)");
}

void GNUMakefileGenerator::processPrlVariable(const QString &var, const QStringList &l)
{
    // we don't do any processing here; everything we need is done in
    // GNUMakefileGenerator::findLibraries()
    return;
}

void GNUMakefileGenerator::processPrlFiles()
{
    // we don't do any processing here; everything we need is done in
    // GNUMakefileGenerator::findLibraries()
    return;
}

QStringList &GNUMakefileGenerator::findDependencies(const QString &file)
{
    QStringList &aList = MakefileGenerator::findDependencies(file);
    // Note: The QMAKE_IMAGE_COLLECTION file have all images
    // as dependency, so don't add precompiled header then
    if (file == project->first("QMAKE_IMAGE_COLLECTION")
        || preCompHeaderOut.isEmpty())
        return aList;
    for (QStringList::Iterator it = Option::c_ext.begin(); it != Option::c_ext.end(); ++it) {
        if (file.endsWith(*it)) {
            QString cHeader = preCompHeaderOut + Option::dir_sep + "c";
            if (!aList.contains(cHeader))
                aList += cHeader;
            break;
        }
    }
    for (QStringList::Iterator it = Option::cpp_ext.begin(); it != Option::cpp_ext.end(); ++it) {
        if (file.endsWith(*it)) {
            QString cppHeader = preCompHeaderOut + Option::dir_sep + "c++";
            if (!aList.contains(cppHeader))
                aList += cppHeader;
            break;
        }
    }
    return aList;
}

void GNUMakefileGenerator::writeProjectVarToStream(QTextStream &t, const QString &var)
{
    QStringList &list = project->values(var);
    for(QStringList::Iterator it = list.begin(); it != list.end(); ++it) {
        t << (*it) << endl;
    }
}

QString GNUMakefileGenerator::makeResponseFileName(const QString &base)
{
    QString fileName = base + "." + var("TARGET");
    if (!var("BUILD_NAME").isEmpty()) {
        fileName += "." + var("BUILD_NAME");
    }
    fileName += ".rsp";
    QString filePath = project->first("OBJECTS_DIR");
    if (filePath.isEmpty())
        filePath = Option::output_dir;
    filePath = Option::fixPathToTargetOS(filePath + QDir::separator() + fileName);
    return filePath;
}

void GNUMakefileGenerator::createCompilerResponseFiles(QTextStream &t)
{
    static const char *vars[] = { "CFLAGS", "CXXFLAGS", "DEFINES", "INCPATH" };

    /* QMAKE_XXX_RSP_VAR is used as a flag whether it is necessary to
     * generate response files to overcome the 1024 chars CMD.EXE limitation.
     * When this variable is defined, a response file with the relevant
     * information will be generated and its full path will be stored in an
     * environment variable with the given name which can then be referred to in
     * other places of qmake.conf (e.g. rules) */

    for (size_t i = 0; i < sizeof(vars)/sizeof(vars[0]); ++i) {
        QString rspVar =
            project->first(QString().sprintf("QMAKE_%s_RSP_VAR", vars[i]));
        if (!rspVar.isEmpty()) {
            QString fileName = makeResponseFileName(vars[i]);
            t << rspVar.leftJustified(14) << "= " << fileName << endl;
            QFile file(fileName);
            if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
                QTextStream rt(&file);
                if (!qstrcmp(vars[i], "CFLAGS")) {
                    rt << varGlue("QMAKE_CFLAGS", QString::null, "\n", "\n");
                } else if (!qstrcmp(vars[i], "CXXFLAGS")) {
                    rt << varGlue("QMAKE_CXXFLAGS", QString::null, "\n", "\n");
                } else if (!qstrcmp(vars[i], "DEFINES")) {
                    rt << varGlue("PRL_EXPORT_DEFINES", "-D", "\n-D", "\n")
                       << varGlue("DEFINES", "-D", "\n-D", "\n");
                } else if (!qstrcmp(vars[i], "INCPATH")) {
                    QString opt = var("QMAKE_CFLAGS_INCDIR");
                    rt << varGlue("INCLUDEPATH", opt, "\n" + opt, "\n");
                } else {
                    Q_ASSERT(false);
                }
                rt.flush();
                file.close();
            }
            project->values("QMAKE_DISTCLEAN").append("$(" + rspVar + ")");
        }
    }
}

void GNUMakefileGenerator::createLinkerResponseFiles(QTextStream &t)
{
    /* see createCompilerResponseFiles() */
    QString var = project->first("QMAKE_OBJECTS_RSP_VAR");
    if (!var.isEmpty()) {
        QString fileName = makeResponseFileName("OBJECTS");
        t << var.leftJustified(14) << "= " << fileName << endl;
        QFile file(fileName);
        if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
            QTextStream rt(&file);
            rt << varGlue("OBJECTS", QString::null, "\n", "\n");
            rt.flush();
            file.close();
        }
        project->values("QMAKE_DISTCLEAN").append("$(" + var + ")");
    }
}

QString GNUMakefileGenerator::escapeFileVars(const QString &vars)
{
    /* In DOS environment, we escape spaces and other illegal characters in
     * filenames with double quotes. However, this is not appropriate for make
     * rule definitions (targets/dependencies) where Unix escaping is
     * expected. If we'd deal only with immediate strings, we could provide
     * necessary escaping in place, but we often use make variables instead of
     * direct file names so we must perform such escaping on the fly. This is
     * what we do here using the q function that we define in writeMakefile().*/
    if (isDosLikeShell()) {
        QString ret = vars;
        QRegExp rx = QRegExp("\\$\\((.+)\\)");
        rx.setMinimal(true);
        ret.replace(rx, "$(call q,$(\\1))");
        return ret;
    }
    return vars;
}

QT_END_NAMESPACE