diff --git a/configure b/configure
index 09966e8e1bf..78ff04a474c 100755
--- a/configure
+++ b/configure
@@ -129,26 +129,6 @@ DEVICE_VARS_FILE=.device.vars
 # utility functions
 #-------------------------------------------------------------------------------
 
-makeabs()
-{
-    local FILE="$1"
-    local RES="$FILE"
-    if [ -z "${FILE##/*}" ]; then
-        true
-    elif [ "$OSTYPE" = "msys" -a -z "${FILE##[a-zA-Z]:[/\\]*}" ]; then
-        true
-    else
-        RES=$PWD/$FILE
-    fi
-    RES=$RES/
-    while true; do
-        nres=`echo "$RES" | sed 's,/[^/][^/]*/\.\./,/,g; s,/\./,/,g'`
-        test x"$nres" = x"$RES" && break
-        RES=$nres
-    done
-    echo "$RES" | sed 's,//,/,g; s,/$,,'
-}
-
 # Helper function for getQMakeConf. It parses include statements in
 # qmake.conf and prints out the expanded file
 expandQMakeConf()
@@ -443,29 +423,6 @@ CFG_SILENT=no
 OPT_MAC_SDK=
 CFG_DEV=no
 
-# initalize variables used for installation
-QT_INSTALL_PREFIX=
-QT_INSTALL_DOCS=
-QT_INSTALL_HEADERS=
-QT_INSTALL_LIBS=
-QT_INSTALL_BINS=
-QT_INSTALL_LIBEXECS=
-QT_INSTALL_PLUGINS=
-QT_INSTALL_IMPORTS=
-QT_INSTALL_QML=
-QT_INSTALL_ARCHDATA=
-QT_INSTALL_DATA=
-QT_INSTALL_TRANSLATIONS=
-QT_INSTALL_SETTINGS=
-QT_INSTALL_EXAMPLES=
-QT_INSTALL_TESTS=
-CFG_SYSROOT=
-QT_HOST_PREFIX=
-QT_HOST_BINS=
-QT_HOST_LIBS=
-QT_HOST_DATA=
-QT_EXT_PREFIX=
-
 # Android vars
 CFG_DEFAULT_ANDROID_NDK_ROOT=$ANDROID_NDK_ROOT
 CFG_DEFAULT_ANDROID_SDK_ROOT=$ANDROID_SDK_ROOT
@@ -590,72 +547,9 @@ while [ "$#" -gt 0 ]; do
 
     UNKNOWN_OPT=no
     case "$VAR" in
-    prefix)
-        QT_INSTALL_PREFIX="$VAL"
-        ;;
-    hostprefix)
-	QT_HOST_PREFIX="$VAL"
-	;;
-    hostdatadir)
-        QT_HOST_DATA="$VAL"
-        ;;
-    hostbindir)
-        QT_HOST_BINS="$VAL"
-        ;;
-    hostlibdir)
-        QT_HOST_LIBS="$VAL"
-        ;;
-    extprefix)
-        QT_EXT_PREFIX="$VAL"
-        ;;
-    docdir)
-        QT_INSTALL_DOCS="$VAL"
-        ;;
-    headerdir)
-        QT_INSTALL_HEADERS="$VAL"
-        ;;
-    plugindir)
-        QT_INSTALL_PLUGINS="$VAL"
-        ;;
-    importdir)
-        QT_INSTALL_IMPORTS="$VAL"
-        ;;
-    qmldir)
-        QT_INSTALL_QML="$VAL"
-        ;;
-    archdatadir)
-        QT_INSTALL_ARCHDATA="$VAL"
-        ;;
-    datadir)
-        QT_INSTALL_DATA="$VAL"
-        ;;
-    libdir)
-        QT_INSTALL_LIBS="$VAL"
-        ;;
-    translationdir)
-        QT_INSTALL_TRANSLATIONS="$VAL"
-        ;;
-    sysconfdir|settingsdir)
-        QT_INSTALL_SETTINGS="$VAL"
-        ;;
-    examplesdir)
-        QT_INSTALL_EXAMPLES="$VAL"
-        ;;
-    testsdir)
-        QT_INSTALL_TESTS="$VAL"
-        ;;
-    sysroot)
-        CFG_SYSROOT="$VAL"
-        ;;
     external-hostbindir)
         CFG_HOST_QT_TOOLS_PATH="$VAL"
         ;;
-    bindir)
-        QT_INSTALL_BINS="$VAL"
-        ;;
-    libexecdir)
-        QT_INSTALL_LIBEXECS="$VAL"
-        ;;
     sdk)
         if [ "$BUILD_ON_MAC" = "yes" ]; then
             DeviceVar set QMAKE_MAC_SDK "$VAL"
@@ -1090,274 +984,6 @@ if [ "$XPLATFORM_ANDROID" = "no" ]; then
     fi
 fi
 
-#-------------------------------------------------------------------------------
-# postprocess installation and deployment paths
-#-------------------------------------------------------------------------------
-
-if [ -z "$QT_INSTALL_PREFIX" ]; then
-    if [ "$CFG_DEV" = "yes" ]; then
-        QT_INSTALL_PREFIX="$outpath" # In Development, we use sandboxed builds by default
-    else
-        QT_INSTALL_PREFIX="/usr/local/Qt-${QT_VERSION}" # the default install prefix is /usr/local/Qt-$QT_VERSION
-    fi
-fi
-QT_INSTALL_PREFIX=`makeabs "$QT_INSTALL_PREFIX"`
-
-if [ -z "$QT_EXT_PREFIX" ]; then
-    QT_EXT_PREFIX=$QT_INSTALL_PREFIX
-    if [ -n "$CFG_SYSROOT" ]; then
-        QMAKE_SYSROOTIFY=true
-    else
-        QMAKE_SYSROOTIFY=false
-    fi
-else
-    QT_EXT_PREFIX=`makeabs "$QT_EXT_PREFIX"`
-    QMAKE_SYSROOTIFY=false
-fi
-
-if [ -z "$QT_HOST_PREFIX" ]; then
-    if $QMAKE_SYSROOTIFY; then
-        QT_HOST_PREFIX=$CFG_SYSROOT$QT_EXT_PREFIX
-    else
-        QT_HOST_PREFIX=$QT_EXT_PREFIX
-    fi
-    HAVE_HOST_PATH=false
-else
-    QT_HOST_PREFIX=`makeabs "$QT_HOST_PREFIX"`
-    HAVE_HOST_PATH=true
-fi
-
-#------- make the paths relative to the prefixes --------
-
-PREFIX_COMPLAINTS=
-PREFIX_REMINDER=false
-while read basevar baseoption var option; do
-    eval path=\$QT_${basevar}_$var
-    [ -z "$path" ] && continue
-    path=`makeabs "$path"`
-    eval base=\$QT_${basevar}_PREFIX
-    rel=${path##$base}
-    if [ x"$rel" = x"$path" ]; then
-        if [ x"$option" != x"sysconf" ]; then
-            PREFIX_COMPLAINTS="$PREFIX_COMPLAINTS
-        NOTICE: -${option}dir is not a subdirectory of ${baseoption}prefix."
-            eval \$HAVE_${basevar}_PATH || PREFIX_REMINDER=true
-        fi
-        eval QT_REL_${basevar}_$var=\$rel
-    elif [ -z "$rel" ]; then
-        eval QT_REL_${basevar}_$var=.
-    else
-        eval QT_REL_${basevar}_$var=\${rel#/}
-    fi
-done <<EOF
-INSTALL - DOCS doc
-INSTALL - HEADERS header
-INSTALL - LIBS lib
-INSTALL - LIBEXECS libexec
-INSTALL - BINS bin
-INSTALL - PLUGINS plugin
-INSTALL - IMPORTS import
-INSTALL - QML qml
-INSTALL - ARCHDATA archdata
-INSTALL - DATA data
-INSTALL - TRANSLATIONS translation
-INSTALL - EXAMPLES examples
-INSTALL - TESTS tests
-INSTALL - SETTINGS sysconf
-HOST -host BINS hostbin
-HOST -host LIBS hostlib
-HOST -host DATA hostdata
-EOF
-$PREFIX_REMINDER && PREFIX_COMPLAINTS="$PREFIX_COMPLAINTS
-        Maybe you forgot to specify -prefix/-hostprefix?"
-
-if [ -z "$QT_REL_INSTALL_HEADERS" ]; then
-    QT_REL_INSTALL_HEADERS=include
-fi
-
-if [ -z "$QT_REL_INSTALL_LIBS" ]; then
-    QT_REL_INSTALL_LIBS=lib
-fi
-
-if [ -z "$QT_REL_INSTALL_BINS" ]; then
-    QT_REL_INSTALL_BINS=bin
-fi
-
-if [ -z "$QT_REL_INSTALL_ARCHDATA" ]; then
-    QT_REL_INSTALL_ARCHDATA=.
-fi
-if [ x"$QT_REL_INSTALL_ARCHDATA" != x. ]; then
-    QT_REL_INSTALL_ARCHDATA_PREFIX=$QT_REL_INSTALL_ARCHDATA/
-fi
-
-if [ -z "$QT_REL_INSTALL_LIBEXECS" ]; then
-    if [ "$XPLATFORM_MINGW" = "yes" ]; then
-        QT_REL_INSTALL_LIBEXECS=${QT_REL_INSTALL_ARCHDATA_PREFIX}bin
-    else
-        QT_REL_INSTALL_LIBEXECS=${QT_REL_INSTALL_ARCHDATA_PREFIX}libexec
-    fi
-fi
-
-if [ -z "$QT_REL_INSTALL_PLUGINS" ]; then
-    QT_REL_INSTALL_PLUGINS=${QT_REL_INSTALL_ARCHDATA_PREFIX}plugins
-fi
-
-if [ -z "$QT_REL_INSTALL_IMPORTS" ]; then
-    QT_REL_INSTALL_IMPORTS=${QT_REL_INSTALL_ARCHDATA_PREFIX}imports
-fi
-
-if [ -z "$QT_REL_INSTALL_QML" ]; then
-    QT_REL_INSTALL_QML=${QT_REL_INSTALL_ARCHDATA_PREFIX}qml
-fi
-
-if [ -z "$QT_REL_INSTALL_DATA" ]; then
-    QT_REL_INSTALL_DATA=.
-fi
-if [ x"$QT_REL_INSTALL_DATA" != x. ]; then
-    QT_REL_INSTALL_DATA_PREFIX=$QT_REL_INSTALL_DATA/
-fi
-
-if [ -z "$QT_REL_INSTALL_DOCS" ]; then
-    QT_REL_INSTALL_DOCS=${QT_REL_INSTALL_DATA_PREFIX}doc
-fi
-
-if [ -z "$QT_REL_INSTALL_TRANSLATIONS" ]; then
-    QT_REL_INSTALL_TRANSLATIONS=${QT_REL_INSTALL_DATA_PREFIX}translations
-fi
-
-if [ -z "$QT_REL_INSTALL_EXAMPLES" ]; then
-    QT_REL_INSTALL_EXAMPLES=examples
-fi
-
-if [ -z "$QT_REL_INSTALL_TESTS" ]; then
-    QT_REL_INSTALL_TESTS=tests
-fi
-
-if [ -z "$QT_REL_INSTALL_SETTINGS" ]; then
-    if [ "$XPLATFORM_MAC" = "yes" ]; then
-        QT_REL_INSTALL_SETTINGS=/Library/Preferences/Qt
-    else
-        QT_REL_INSTALL_SETTINGS=etc/xdg
-    fi
-fi
-
-#------- host paths --------
-
-if [ -z "$QT_REL_HOST_BINS" ]; then
-    if $HAVE_HOST_PATH; then
-        QT_REL_HOST_BINS=bin
-    else
-        QT_REL_HOST_BINS=$QT_REL_INSTALL_BINS
-    fi
-fi
-
-if [ -z "$QT_REL_HOST_LIBS" ]; then
-    if $HAVE_HOST_PATH; then
-        QT_REL_HOST_LIBS=lib
-    else
-        QT_REL_HOST_LIBS=$QT_REL_INSTALL_LIBS
-    fi
-fi
-
-if [ -z "$QT_REL_HOST_DATA" ]; then
-    if $HAVE_HOST_PATH; then
-        QT_REL_HOST_DATA=.
-    else
-        QT_REL_HOST_DATA=$QT_REL_INSTALL_ARCHDATA
-    fi
-fi
-
-shortxspec=`echo $XQMAKESPEC | sed "s,^${relpath}/mkspecs/,,"`
-shortspec=`echo $QMAKESPEC | sed "s,^${relpath}/mkspecs/,,"`
-
-QT_CONFIGURE_STR_OFF=0
-
-addConfStr()
-{
-    QT_CONFIGURE_STR_OFFSETS="$QT_CONFIGURE_STR_OFFSETS $QT_CONFIGURE_STR_OFF,"
-    QT_CONFIGURE_STRS="$QT_CONFIGURE_STRS    \"$1\\0\"
-"
-    count=`echo "$1" | wc -c`
-    QT_CONFIGURE_STR_OFF=`expr $QT_CONFIGURE_STR_OFF + $count`
-}
-
-QT_CONFIGURE_STR_OFFSETS=
-QT_CONFIGURE_STRS=
-addConfStr "$QT_REL_INSTALL_DOCS"
-addConfStr "$QT_REL_INSTALL_HEADERS"
-addConfStr "$QT_REL_INSTALL_LIBS"
-addConfStr "$QT_REL_INSTALL_LIBEXECS"
-addConfStr "$QT_REL_INSTALL_BINS"
-addConfStr "$QT_REL_INSTALL_PLUGINS"
-addConfStr "$QT_REL_INSTALL_IMPORTS"
-addConfStr "$QT_REL_INSTALL_QML"
-addConfStr "$QT_REL_INSTALL_ARCHDATA"
-addConfStr "$QT_REL_INSTALL_DATA"
-addConfStr "$QT_REL_INSTALL_TRANSLATIONS"
-addConfStr "$QT_REL_INSTALL_EXAMPLES"
-addConfStr "$QT_REL_INSTALL_TESTS"
-QT_CONFIGURE_STR_OFFSETS_ALL=$QT_CONFIGURE_STR_OFFSETS
-QT_CONFIGURE_STRS_ALL=$QT_CONFIGURE_STRS
-
-QT_CONFIGURE_STR_OFFSETS=
-QT_CONFIGURE_STRS=
-addConfStr "$CFG_SYSROOT"
-addConfStr "$QT_REL_HOST_BINS"
-addConfStr "$QT_REL_HOST_LIBS"
-addConfStr "$QT_REL_HOST_DATA"
-addConfStr "$shortxspec"
-addConfStr "$shortspec"
-
-#-------------------------------------------------------------------------------
-# generate qconfig.cpp
-#-------------------------------------------------------------------------------
-[ -d "$outpath/src/corelib/global" ] || mkdir -p "$outpath/src/corelib/global"
-
-cat > "$outpath/src/corelib/global/qconfig.cpp.new" <<EOF
-/* Installation date */
-static const char qt_configure_installation          [12+11]    = "qt_instdate=2012-12-20";
-
-/* Installation Info */
-static const char qt_configure_prefix_path_str       [256 + 12] = "qt_prfxpath=$QT_INSTALL_PREFIX";
-#ifdef QT_BUILD_QMAKE
-static const char qt_configure_ext_prefix_path_str   [256 + 12] = "qt_epfxpath=$QT_EXT_PREFIX";
-static const char qt_configure_host_prefix_path_str  [256 + 12] = "qt_hpfxpath=$QT_HOST_PREFIX";
-#endif
-
-static const short qt_configure_str_offsets[] = {
-    $QT_CONFIGURE_STR_OFFSETS_ALL
-#ifdef QT_BUILD_QMAKE
-    $QT_CONFIGURE_STR_OFFSETS
-#endif
-};
-static const char qt_configure_strs[] =
-$QT_CONFIGURE_STRS_ALL#ifdef QT_BUILD_QMAKE
-$QT_CONFIGURE_STRS#endif
-;
-
-#define QT_CONFIGURE_SETTINGS_PATH "$QT_REL_INSTALL_SETTINGS"
-
-#ifdef QT_BUILD_QMAKE
-# define QT_CONFIGURE_SYSROOTIFY_PREFIX $QMAKE_SYSROOTIFY
-#endif
-
-#define QT_CONFIGURE_PREFIX_PATH qt_configure_prefix_path_str + 12
-#ifdef QT_BUILD_QMAKE
-# define QT_CONFIGURE_EXT_PREFIX_PATH qt_configure_ext_prefix_path_str + 12
-# define QT_CONFIGURE_HOST_PREFIX_PATH qt_configure_host_prefix_path_str + 12
-#endif
-EOF
-
-# avoid unecessary rebuilds by copying only if qconfig.cpp has changed
-if cmp -s "$outpath/src/corelib/global/qconfig.cpp" "$outpath/src/corelib/global/qconfig.cpp.new"; then
-    rm -f "$outpath/src/corelib/global/qconfig.cpp.new"
-else
-    [ -f "$outpath/src/corelib/global/qconfig.cpp" ] && chmod +w "$outpath/src/corelib/global/qconfig.cpp"
-    mv "$outpath/src/corelib/global/qconfig.cpp.new" "$outpath/src/corelib/global/qconfig.cpp"
-    chmod -w "$outpath/src/corelib/global/qconfig.cpp"
-fi
-
-
 # -----------------------------------------------------------------------------
 # build qmake
 # -----------------------------------------------------------------------------
@@ -1491,51 +1117,16 @@ setBootstrapVariable()
 # create a qt.conf for the Qt build tree itself
 #-------------------------------------------------------------------------------
 
-printInstallPaths()
-{
-    cat <<EOF
-Documentation=$QT_REL_INSTALL_DOCS
-Headers=$QT_REL_INSTALL_HEADERS
-Libraries=$QT_REL_INSTALL_LIBS
-LibraryExecutables=$QT_REL_INSTALL_LIBEXECS
-Binaries=$QT_REL_INSTALL_BINS
-Plugins=$QT_REL_INSTALL_PLUGINS
-Imports=$QT_REL_INSTALL_IMPORTS
-Qml2Imports=$QT_REL_INSTALL_QML
-ArchData=$QT_REL_INSTALL_ARCHDATA
-Data=$QT_REL_INSTALL_DATA
-Translations=$QT_REL_INSTALL_TRANSLATIONS
-Examples=$QT_REL_INSTALL_EXAMPLES
-Tests=$QT_REL_INSTALL_TESTS
-EOF
-}
-
+# Note that this file is just sufficient to boot configure, by which it is
+# replaced in-place with a version which is suitable for building all of Qt.
 QTCONFFILE="$outpath/bin/qt.conf"
 cat > "$QTCONFFILE" <<EOF
 [EffectivePaths]
 Prefix=..
-EOF
-if [ -n "$CFG_HOST_QT_TOOLS_PATH" ]; then
-    cat >> "$QTCONFFILE" <<EOF
-[DevicePaths]
-Prefix=$QT_INSTALL_PREFIX
-`printInstallPaths`
 [Paths]
-Prefix=$QT_EXT_PREFIX
-`printInstallPaths`
-HostPrefix=$QT_HOST_PREFIX
-HostBinaries=$QT_REL_HOST_BINS
-HostLibraries=$QT_REL_HOST_LIBS
-HostData=$QT_REL_HOST_DATA
 TargetSpec=$XPLATFORM
 HostSpec=$PLATFORM
 EOF
-    if [ -n "$CFG_SYSROOT" ]; then
-        cat >> "$QTCONFFILE" <<EOF
-Sysroot=$CFG_SYSROOT
-EOF
-    fi
-fi
 if [ x"$relpath" != x"$outpath" ]; then
     cat >> "$QTCONFFILE" <<EOF
 [EffectiveSourcePaths]
@@ -1594,12 +1185,7 @@ else
     echo
 fi
 
-if [ -n "$PREFIX_COMPLAINTS" ]; then
-    echo
-    echo "$PREFIX_COMPLAINTS"
-    echo
-fi
-
+QT_INSTALL_PREFIX=`sed -ne 's/^Prefix=//p' < "$outpath/qmake/builtin-qt.conf"`
 MAKE=`basename "$MAKE"`
 echo
 echo Qt is now configured for building. Just run \'$MAKE\'.
diff --git a/configure.json b/configure.json
index 9c6248549e4..537a6ff526d 100644
--- a/configure.json
+++ b/configure.json
@@ -1,5 +1,7 @@
 {
     "files": {
+        "builtinQtConf": "qmake/builtin-qt.conf",
+        "qconfigSource": "src/corelib/global/qconfig.cpp",
         "publicHeader": "src/corelib/global/qconfig.h",
         "privateHeader": "src/corelib/global/qconfig_p.h",
         "publicPro": "mkspecs/qconfig.pri",
@@ -43,7 +45,7 @@
             "libexecdir": "string",
             "plugindir": "string",
             "qmldir": "string",
-            "settingsdir": "string",
+            "settingsdir": { "type": "string", "name": "sysconfdir" },
             "sysconfdir": "string",
             "testsdir": "string",
             "translationdir": "string",
@@ -416,6 +418,9 @@
     },
 
     "features": {
+        "prepare": {
+            "output": [ "preparePaths" ]
+        },
         "android-style-assets": {
             "label": "Android Style Assets",
             "condition": "config.android",
@@ -967,6 +972,10 @@
     },
 
     "earlyReport": [
+        {
+            "condition": "!features.prepare",
+            "comment": "This is not an actual report - instead, it activates the early setup."
+        },
         {
             "type": "fatal",
             "condition": "!call.licenseCheck",
diff --git a/configure.pri b/configure.pri
index 93e2fe894aa..2c70f271b02 100644
--- a/configure.pri
+++ b/configure.pri
@@ -437,6 +437,237 @@ defineTest(qtConfTest_checkCompiler) {
 
 # custom outputs
 
+# type (empty or 'host'), option name, default value
+defineTest(processQtPath) {
+    out_var = config.rel_input.$${2}
+    path = $$eval(config.input.$${2})
+    isEmpty(path) {
+        $$out_var = $$3
+    } else {
+        path = $$absolute_path($$path, $$OUT_PWD)
+        rel = $$relative_path($$path, $$eval(config.input.$${1}prefix))
+        isEmpty(rel) {
+            $$out_var = .
+        } else: contains(rel, \.\..*) {
+            !equals(2, sysconfdir) {
+                PREFIX_COMPLAINTS += "-$$2 is not a subdirectory of -$${1}prefix."
+                export(PREFIX_COMPLAINTS)
+                !$$eval(have_$${1}prefix) {
+                    PREFIX_REMINDER = true
+                    export(PREFIX_REMINDER)
+                }
+            }
+            $$out_var = $$path
+        } else {
+            $$out_var = $$rel
+        }
+    }
+    export($$out_var)
+}
+
+defineTest(addConfStr) {
+    QT_CONFIGURE_STR_OFFSETS += "    $$QT_CONFIGURE_STR_OFF,"
+    QT_CONFIGURE_STRS += "    \"$$1\\0\""
+    QT_CONFIGURE_STR_OFF = $$num_add($$QT_CONFIGURE_STR_OFF, $$str_size($$1), 1)
+    export(QT_CONFIGURE_STR_OFFSETS)
+    export(QT_CONFIGURE_STRS)
+    export(QT_CONFIGURE_STR_OFF)
+}
+
+defineReplace(printInstallPath) {
+    val = $$eval(config.rel_input.$$2)
+    equals(val, $$3): return()
+    return("$$1=$$val")
+}
+
+defineReplace(printInstallPaths) {
+    ret = \
+        $$printInstallPath(Documentation, docdir, doc) \
+        $$printInstallPath(Headers, headerdir, include) \
+        $$printInstallPath(Libraries, libdir, lib) \
+        $$printInstallPath(LibraryExecutables, libexecdir, $$DEFAULT_LIBEXEC) \
+        $$printInstallPath(Binaries, bindir, bin) \
+        $$printInstallPath(Plugins, plugindir, plugins) \
+        $$printInstallPath(Imports, importdir, imports) \
+        $$printInstallPath(Qml2Imports, qmldir, qml) \
+        $$printInstallPath(ArchData, archdatadir, .) \
+        $$printInstallPath(Data, datadir, .) \
+        $$printInstallPath(Translations, translationdir, translations) \
+        $$printInstallPath(Examples, examplesdir, examples) \
+        $$printInstallPath(Tests, testsdir, tests)
+    return($$ret)
+}
+
+defineReplace(printHostPaths) {
+    ret = \
+        "HostPrefix=$$config.input.hostprefix" \
+        $$printInstallPath(HostBinaries, hostbindir, bin) \
+        $$printInstallPath(HostLibraries, hostlibdir, lib) \
+        $$printInstallPath(HostData, hostdatadir, .) \
+        "Sysroot=$$config.input.sysroot" \
+        "TargetSpec=$$[QMAKE_XSPEC]" \
+        "HostSpec=$$[QMAKE_SPEC]"
+    return($$ret)
+}
+
+defineTest(qtConfOutput_preparePaths) {
+    isEmpty(config.input.prefix) {
+        $$qtConfEvaluate("features.developer-build"): \
+            config.input.prefix = $$QT_BUILD_TREE  # In Development, we use sandboxed builds by default
+        else: \
+            config.input.prefix = /usr/local/Qt-$$[QT_VERSION]
+        have_prefix = false
+    } else {
+        config.input.prefix = $$absolute_path($$config.input.prefix, $$OUT_PWD)
+        have_prefix = true
+    }
+
+    isEmpty(config.input.extprefix) {
+        config.input.extprefix = $$config.input.prefix
+        !isEmpty(config.input.sysroot): \
+            qmake_sysrootify = true
+        else: \
+            qmake_sysrootify = false
+    } else {
+        config.input.extprefix = $$absolute_path($$config.input.extprefix, $$OUT_PWD)
+        qmake_sysrootify = false
+    }
+
+    isEmpty(config.input.hostprefix) {
+        $$qmake_sysrootify: \
+            config.input.hostprefix = $$config.input.sysroot$$config.input.extprefix
+        else: \
+            config.input.hostprefix = $$config.input.extprefix
+        have_hostprefix = false
+    } else {
+        isEqual(config.input.hostprefix, yes): \
+            config.input.hostprefix = $$QT_BUILD_TREE
+        else: \
+            config.input.hostprefix = $$absolute_path($$config.input.hostprefix, $$OUT_PWD)
+        have_hostprefix = true
+    }
+
+    PREFIX_COMPLAINTS =
+    PREFIX_REMINDER = false
+    win32: \
+        DEFAULT_LIBEXEC = bin
+    else: \
+        DEFAULT_LIBEXEC = libexec
+    darwin: \
+        DEFAULT_SYSCONFDIR = /Library/Preferences/Qt
+    else: \
+        DEFAULT_SYSCONFDIR = etc/xdg
+
+    processQtPath("", headerdir, include)
+    processQtPath("", libdir, lib)
+    processQtPath("", bindir, bin)
+    processQtPath("", datadir, .)
+    !equals(config.rel_input.datadir, .): \
+        data_pfx = $$config.rel_input.datadir/
+    processQtPath("", docdir, $${data_pfx}doc)
+    processQtPath("", translationdir, $${data_pfx}translations)
+    processQtPath("", examplesdir, $${data_pfx}examples)
+    processQtPath("", testsdir, tests)
+    processQtPath("", archdatadir, .)
+    !equals(config.rel_input.archdatadir, .): \
+        archdata_pfx = $$config.rel_input.archdatadir/
+    processQtPath("", libexecdir, $${archdata_pfx}$$DEFAULT_LIBEXEC)
+    processQtPath("", plugindir, $${archdata_pfx}plugins)
+    processQtPath("", importdir, $${archdata_pfx}imports)
+    processQtPath("", qmldir, $${archdata_pfx}qml)
+    processQtPath("", sysconfdir, $$DEFAULT_SYSCONFDIR)
+    $$have_hostprefix {
+        processQtPath(host, hostbindir, bin)
+        processQtPath(host, hostlibdir, lib)
+        processQtPath(host, hostdatadir, .)
+    } else {
+        processQtPath(host, hostbindir, $$config.rel_input.bindir)
+        processQtPath(host, hostlibdir, $$config.rel_input.libdir)
+        processQtPath(host, hostdatadir, $$config.rel_input.archdatadir)
+    }
+
+    !isEmpty(PREFIX_COMPLAINTS) {
+        PREFIX_COMPLAINTS = "$$join(PREFIX_COMPLAINTS, "$$escape_expand(\\n)Note: ")"
+        $$PREFIX_REMINDER: \
+            PREFIX_COMPLAINTS += "Maybe you forgot to specify -prefix/-hostprefix?"
+        qtConfAddNote($$PREFIX_COMPLAINTS)
+    }
+
+    # populate qconfig.cpp (for qtcore)
+
+    QT_CONFIGURE_STR_OFF = 0
+    QT_CONFIGURE_STR_OFFSETS =
+    QT_CONFIGURE_STRS =
+
+    addConfStr($$config.rel_input.docdir)
+    addConfStr($$config.rel_input.headerdir)
+    addConfStr($$config.rel_input.libdir)
+    addConfStr($$config.rel_input.libexecdir)
+    addConfStr($$config.rel_input.bindir)
+    addConfStr($$config.rel_input.plugindir)
+    addConfStr($$config.rel_input.importdir)
+    addConfStr($$config.rel_input.qmldir)
+    addConfStr($$config.rel_input.archdatadir)
+    addConfStr($$config.rel_input.datadir)
+    addConfStr($$config.rel_input.translationdir)
+    addConfStr($$config.rel_input.examplesdir)
+    addConfStr($$config.rel_input.testsdir)
+
+    $${currentConfig}.output.qconfigSource = \
+        "/* Installation date */" \
+        "static const char qt_configure_installation     [12+11]  = \"qt_instdate=2012-12-20\";" \
+        "" \
+        "/* Installation Info */" \
+        "static const char qt_configure_prefix_path_str  [12+256] = \"qt_prfxpath=$$config.input.prefix\";" \
+        "" \
+        "static const short qt_configure_str_offsets[] = {" \
+        $$QT_CONFIGURE_STR_OFFSETS \
+        "};" \
+        "static const char qt_configure_strs[] =" \
+        $$QT_CONFIGURE_STRS \
+        ";" \
+        "" \
+        "$${LITERAL_HASH}define QT_CONFIGURE_SETTINGS_PATH \"$$config.rel_input.sysconfdir\"" \
+        "" \
+        "$${LITERAL_HASH}define QT_CONFIGURE_PREFIX_PATH qt_configure_prefix_path_str + 12"
+    export($${currentConfig}.output.qconfigSource)
+
+    # populate qmake/builtin-qt.conf
+
+    $${currentConfig}.output.builtinQtConf = \
+        " " \
+        "===========================================================" \
+        "==================== qt.conf beginning ====================" \
+        "===========================================================" \
+        "[Paths]" \
+        "ExtPrefix=$$config.input.extprefix" \
+        "Prefix=$$config.input.prefix" \
+        $$printInstallPaths() \
+        "Settings=$$config.rel_input.sysconfdir" \
+        $$printHostPaths()
+    export($${currentConfig}.output.builtinQtConf)
+
+    # create bin/qt.conf. this doesn't use the regular file output
+    # mechanism, as the file is relied upon by configure tests.
+
+    cont = \
+        "[EffectivePaths]" \
+        "Prefix=.." \
+        "[DevicePaths]" \
+        "Prefix=$$config.input.prefix" \
+        $$printInstallPaths() \
+        "[Paths]" \
+        "Prefix=$$config.input.extprefix" \
+        $$printInstallPaths() \
+        $$printHostPaths()
+    !equals(QT_SOURCE_TREE, $$QT_BUILD_TREE): \
+        cont += \
+            "[EffectiveSourcePaths]" \
+            "Prefix=$$QT_SOURCE_TREE"
+    write_file($$QT_BUILD_TREE/bin/qt.conf, cont)|error()
+    reload_properties()
+}
+
 defineTest(qtConfOutput_shared) {
     !$${2}: return()
 
diff --git a/mkspecs/features/qt_configure.prf b/mkspecs/features/qt_configure.prf
index 936a563b9e8..cd4d36251ec 100644
--- a/mkspecs/features/qt_configure.prf
+++ b/mkspecs/features/qt_configure.prf
@@ -1675,7 +1675,7 @@ defineTest(qtConfProcessOutput) {
                 $${currentConfig}.output.$$type += "$$k -= $$eval($${currentConfig}.output.$${type}.remove.$$k)"
             for (k, $${currentConfig}.output.$${type}.append._KEYS_): \
                 $${currentConfig}.output.$$type += "$$k += $$eval($${currentConfig}.output.$${type}.append.$$k)"
-        } else {
+        } else: contains(type, ".*Header") {
             for (define, $${currentConfig}.output.$${type}._KEYS_) {
                 value = $$eval($${currentConfig}.output.$${type}.$${define})
                 $${currentConfig}.output.$$type += "$${LITERAL_HASH}define $$define $$value"
diff --git a/qmake/Makefile.unix b/qmake/Makefile.unix
index 808a6d82330..aa6c876c737 100644
--- a/qmake/Makefile.unix
+++ b/qmake/Makefile.unix
@@ -66,7 +66,6 @@ DEPEND_SRC = \
 	   $(SOURCE_PATH)/src/corelib/io/qdir.cpp $(SOURCE_PATH)/src/corelib/plugin/quuid.cpp \
 	   $(SOURCE_PATH)/src/corelib/io/qfileinfo.cpp $(SOURCE_PATH)/src/corelib/tools/qdatetime.cpp \
 	   $(SOURCE_PATH)/src/corelib/tools/qstringlist.cpp $(SOURCE_PATH)/src/corelib/tools/qmap.cpp \
-	   $(SOURCE_PATH)/src/corelib/global/qconfig.cpp \
 	   $(SOURCE_PATH)/src/corelib/tools/qstringbuilder.cpp \
 	   $(SOURCE_PATH)/src/corelib/tools/qlocale.cpp \
 	   $(SOURCE_PATH)/src/corelib/tools/qlocale_tools.cpp \
@@ -225,7 +224,7 @@ qsettings.o: $(SOURCE_PATH)/src/corelib/io/qsettings.cpp
 qsystemerror.o: $(SOURCE_PATH)/src/corelib/kernel/qsystemerror.cpp
 	$(CXX) -c -o $@ $(CXXFLAGS) $(SOURCE_PATH)/src/corelib/kernel/qsystemerror.cpp
 
-qlibraryinfo.o: $(SOURCE_PATH)/src/corelib/global/qlibraryinfo.cpp $(BUILD_PATH)/src/corelib/global/qconfig.cpp
+qlibraryinfo.o: $(SOURCE_PATH)/src/corelib/global/qlibraryinfo.cpp
 	$(CXX) -c -o $@ $(CXXFLAGS) $(SOURCE_PATH)/src/corelib/global/qlibraryinfo.cpp
 
 qnumeric.o: $(SOURCE_PATH)/src/corelib/global/qnumeric.cpp
diff --git a/qmake/Makefile.win32 b/qmake/Makefile.win32
index cd2cdd9c408..862c1e833ed 100644
--- a/qmake/Makefile.win32
+++ b/qmake/Makefile.win32
@@ -154,8 +154,6 @@ $(OBJS): $(PCH_OBJECT)
 
 $(QTOBJS): $(PCH_OBJECT)
 
-qlibraryinfo.obj: $(BUILD_PATH)\src\corelib\global\qconfig.cpp
-
 qmake_pch.obj:
 	$(CXX) $(CXXFLAGS_BARE) -c -Yc -Fpqmake_pch.pch -TP $(QMKSRC)\qmake_pch.h
 
diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index 7648b9373d2..b30373b5966 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -101,7 +101,7 @@ enum TestFunc {
     T_EXISTS, T_EXPORT, T_CLEAR, T_UNSET, T_EVAL, T_CONFIG, T_SYSTEM,
     T_DEFINED, T_DISCARD_FROM, T_CONTAINS, T_INFILE,
     T_COUNT, T_ISEMPTY, T_PARSE_JSON, T_INCLUDE, T_LOAD, T_DEBUG, T_LOG, T_MESSAGE, T_WARNING, T_ERROR, T_IF,
-    T_MKPATH, T_WRITE_FILE, T_TOUCH, T_CACHE
+    T_MKPATH, T_WRITE_FILE, T_TOUCH, T_CACHE, T_RELOAD_PROPERTIES
 };
 
 void QMakeEvaluator::initFunctionStatics()
@@ -200,6 +200,7 @@ void QMakeEvaluator::initFunctionStatics()
         { "write_file", T_WRITE_FILE },
         { "touch", T_TOUCH },
         { "cache", T_CACHE },
+        { "reload_properties", T_RELOAD_PROPERTIES },
     };
     statics.functions.reserve((int)(sizeof(testInits)/sizeof(testInits[0])));
     for (unsigned i = 0; i < sizeof(testInits)/sizeof(testInits[0]); ++i)
@@ -2015,6 +2016,11 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinConditional(
         }
         return writeFile(fL1S("cache "), fn, QIODevice::Append, false, varstr);
     }
+    case T_RELOAD_PROPERTIES:
+#ifdef QT_BUILD_QMAKE
+        m_option->reloadProperties();
+#endif
+        return ReturnTrue;
     default:
         evalError(fL1S("Function '%1' is not implemented.").arg(function.toQString(m_tmp1)));
         return ReturnFalse;
diff --git a/qmake/library/qmakeglobals.h b/qmake/library/qmakeglobals.h
index 96c39fa168e..1bb86328831 100644
--- a/qmake/library/qmakeglobals.h
+++ b/qmake/library/qmakeglobals.h
@@ -125,6 +125,7 @@ public:
     void setDirectories(const QString &input_dir, const QString &output_dir);
 #ifdef QT_BUILD_QMAKE
     void setQMakeProperty(QMakeProperty *prop) { property = prop; }
+    void reloadProperties() { property->reload(); }
     ProString propertyValue(const ProKey &name) const { return property->value(name); }
 #else
 #  ifdef PROEVALUATOR_INIT_PROPS
diff --git a/qmake/option.cpp b/qmake/option.cpp
index fb49f5a1003..b8102ecf06b 100644
--- a/qmake/option.cpp
+++ b/qmake/option.cpp
@@ -638,6 +638,11 @@ qmakeAddCacheClear(qmakeCacheClearFunc func, void **data)
     cache_items.append(new QMakeCacheClearItem(func, data));
 }
 
+QString qmake_absoluteLocation()
+{
+    return Option::globals->qmake_abslocation;
+}
+
 QString qmake_libraryInfoFile()
 {
     if (!Option::globals->qtconf.isEmpty())
diff --git a/qmake/property.cpp b/qmake/property.cpp
index d17d62481ae..9a8db8904d1 100644
--- a/qmake/property.cpp
+++ b/qmake/property.cpp
@@ -70,6 +70,12 @@ static const struct {
 
 QMakeProperty::QMakeProperty() : settings(0)
 {
+    reload();
+}
+
+void QMakeProperty::reload()
+{
+    QLibraryInfo::reload();
     for (unsigned i = 0; i < sizeof(propList)/sizeof(propList[0]); i++) {
         QString name = QString::fromLatin1(propList[i].name);
         if (!propList[i].singular) {
diff --git a/qmake/property.h b/qmake/property.h
index cd04e4bc03f..b0129196eb7 100644
--- a/qmake/property.h
+++ b/qmake/property.h
@@ -50,6 +50,8 @@ public:
     QMakeProperty();
     ~QMakeProperty();
 
+    void reload();
+
     bool hasValue(const ProKey &);
     ProString value(const ProKey &);
 
diff --git a/qmake/qmake-aux.pro b/qmake/qmake-aux.pro
index 33a7fbfd2d6..357ebc73674 100644
--- a/qmake/qmake-aux.pro
+++ b/qmake/qmake-aux.pro
@@ -6,6 +6,24 @@ QMAKE_DOCS = $$PWD/doc/qmake.qdocconf
 
 # qmake binary
 win32: EXTENSION = .exe
+
+!build_pass {
+    qmake_exe.target = $$OUT_PWD/qmake$$EXTENSION
+    qmake_exe.depends = ../bin/qmake$$EXTENSION builtin-qt.conf
+    equals(QMAKE_DIR_SEP, /): \
+        qmake_exe.commands = cat ../bin/qmake$$EXTENSION builtin-qt.conf > qmake$$EXTENSION && chmod +x qmake$$EXTENSION
+    else: \
+        qmake_exe.commands = copy /B ..\bin\qmake$$EXTENSION + builtin-qt.conf qmake$$EXTENSION
+    QMAKE_EXTRA_TARGETS += qmake_exe
+
+    QMAKE_CLEAN += builtin-qt.conf
+    QMAKE_DISTCLEAN += qmake$$EXTENSION
+
+    first.depends += qmake_exe
+    QMAKE_EXTRA_TARGETS += first
+}
+
 qmake.path = $$[QT_HOST_BINS]
-qmake.files = $$OUT_PWD/../bin/qmake$$EXTENSION
+qmake.files = $$OUT_PWD/qmake$$EXTENSION
+qmake.CONFIG = no_check_exist executable
 INSTALLS += qmake
diff --git a/src/corelib/global/qlibraryinfo.cpp b/src/corelib/global/qlibraryinfo.cpp
index 27fe10a79ea..87ee75fa455 100644
--- a/src/corelib/global/qlibraryinfo.cpp
+++ b/src/corelib/global/qlibraryinfo.cpp
@@ -41,15 +41,18 @@
 #include "qdir.h"
 #include "qstringlist.h"
 #include "qfile.h"
+#include "qtemporaryfile.h"
 #include "qsettings.h"
 #include "qlibraryinfo.h"
 #include "qscopedpointer.h"
 
 #ifdef QT_BUILD_QMAKE
 QT_BEGIN_NAMESPACE
+extern QString qmake_absoluteLocation();
 extern QString qmake_libraryInfoFile();
 QT_END_NAMESPACE
 #else
+# include "qconfig.cpp"
 # include "qcoreapplication.h"
 #endif
 
@@ -57,7 +60,6 @@ QT_END_NAMESPACE
 #  include "private/qcore_mac_p.h"
 #endif
 
-#include "qconfig.cpp"
 #include "archdetect.cpp"
 
 QT_BEGIN_NAMESPACE
@@ -70,9 +72,16 @@ struct QLibrarySettings
 {
     QLibrarySettings();
     void load();
+#ifdef QT_BUILD_QMAKE
+    void loadBuiltinValues(QSettings *config);
+#endif
 
     QScopedPointer<QSettings> settings;
 #ifdef QT_BUILD_QMAKE
+    QString builtinValues[QLibraryInfo::LastHostPath + 1];
+# ifndef Q_OS_WIN
+    QString builtinSettingsPath;
+# endif
     bool haveDevicePaths;
     bool haveEffectiveSourcePaths;
     bool haveEffectivePaths;
@@ -88,6 +97,11 @@ class QLibraryInfoPrivate
 public:
     static QSettings *findConfiguration();
 #ifdef QT_BUILD_QMAKE
+    static void reload()
+    {
+        if (qt_library_settings.exists())
+            qt_library_settings->load();
+    }
     static bool haveGroup(QLibraryInfo::PathGroup group)
     {
         QLibrarySettings *ls = qt_library_settings();
@@ -99,6 +113,25 @@ public:
                          ? ls->haveDevicePaths
                          : ls->havePaths) : false;
     }
+    static bool sysrootify()
+    {
+        // This is actually bogus, as it does not consider post-configure settings.
+        QLibrarySettings *ls = qt_library_settings();
+        return ls ? (!ls->builtinValues[QLibraryInfo::SysrootPath].isEmpty()
+                     && ls->builtinValues[QLibraryInfo::ExtPrefixPath].isEmpty()) : false;
+    }
+    static QString builtinValue(int loc)
+    {
+        QLibrarySettings *ls = qt_library_settings();
+        return ls ? ls->builtinValues[loc] : QString();
+    }
+# ifndef Q_OS_WIN
+    static QString builtinSettingsPath()
+    {
+        QLibrarySettings *ls = qt_library_settings();
+        return ls ? ls->builtinSettingsPath : QString();
+    }
+# endif
 #endif
     static QSettings *configuration()
     {
@@ -122,6 +155,20 @@ QLibrarySettings::QLibrarySettings()
     load();
 }
 
+#ifdef QT_BUILD_QMAKE
+static QByteArray qtconfSeparator()
+{
+# ifdef Q_OS_WIN
+    QByteArray header = QByteArrayLiteral("\r\n===========================================================\r\n");
+# else
+    QByteArray header = QByteArrayLiteral("\n===========================================================\n");
+# endif
+    QByteArray content = QByteArrayLiteral("==================== qt.conf beginning ====================");
+    // Assemble from pieces to avoid that the string appears in a raw executable
+    return header + content + header;
+}
+#endif
+
 void QLibrarySettings::load()
 {
     // If we get any settings here, those won't change when the application shows up.
@@ -159,6 +206,27 @@ void QLibrarySettings::load()
         havePaths = false;
 #endif
     }
+
+#ifdef QT_BUILD_QMAKE
+    // Try to use an embedded qt.conf appended to the QMake executable.
+    QFile qmakeFile(qmake_absoluteLocation());
+    if (!qmakeFile.open(QIODevice::ReadOnly))
+        return;
+    qmakeFile.seek(qmakeFile.size() - 10000);
+    QByteArray tail = qmakeFile.read(10000);
+    QByteArray separator = qtconfSeparator();
+    int qtconfOffset = tail.lastIndexOf(separator);
+    if (qtconfOffset < 0)
+        return;
+    tail.remove(0, qtconfOffset + separator.size());
+    // If QSettings had a c'tor taking a QIODevice, we'd pass a QBuffer ...
+    QTemporaryFile tmpFile;
+    tmpFile.open();
+    tmpFile.write(tail);
+    tmpFile.close();
+    QSettings builtinSettings(tmpFile.fileName(), QSettings::IniFormat);
+    loadBuiltinValues(&builtinSettings);
+#endif
 }
 
 QSettings *QLibraryInfoPrivate::findConfiguration()
@@ -420,10 +488,30 @@ static const struct {
     { "HostData", "." },
     { "TargetSpec", "" },
     { "HostSpec", "" },
+    { "ExtPrefix", "" },
     { "HostPrefix", "" },
 #endif
 };
 
+#ifdef QT_BUILD_QMAKE
+void QLibrarySettings::loadBuiltinValues(QSettings *config)
+{
+    config->beginGroup(QLatin1String("Paths"));
+    for (int i = 0; i <= QLibraryInfo::LastHostPath; i++)
+        builtinValues[i] = config->value(QLatin1String(qtConfEntries[i].key),
+                                         QLatin1String(qtConfEntries[i].value)).toString();
+# ifndef Q_OS_WIN
+    builtinSettingsPath = config->value(QLatin1String("Settings")).toString();
+# endif
+    config->endGroup();
+}
+
+void QLibraryInfo::reload()
+{
+    QLibraryInfoPrivate::reload();
+}
+#endif
+
 /*!
   Returns the location specified by \a loc.
 */
@@ -434,7 +522,7 @@ QLibraryInfo::location(LibraryLocation loc)
     QString ret = rawLocation(loc, FinalPaths);
 
     // Automatically prepend the sysroot to target paths
-    if ((loc < SysrootPath || loc > LastHostPath) && QT_CONFIGURE_SYSROOTIFY_PREFIX) {
+    if ((loc < SysrootPath || loc > LastHostPath) && QLibraryInfoPrivate::sysrootify()) {
         QString sysroot = rawLocation(SysrootPath, FinalPaths);
         if (!sysroot.isEmpty() && ret.length() > 2 && ret.at(1) == QLatin1Char(':')
             && (ret.at(2) == QLatin1Char('/') || ret.at(2) == QLatin1Char('\\')))
@@ -528,28 +616,32 @@ QLibraryInfo::rawLocation(LibraryLocation loc, PathGroup group)
 #endif // QT_NO_SETTINGS
 
     if (!fromConf) {
+#ifdef QT_BUILD_QMAKE
+        if ((unsigned)loc <= (unsigned)LastHostPath) {
+            if (loc == PrefixPath && group != DevicePaths)
+                ret = QLibraryInfoPrivate::builtinValue(ExtPrefixPath);
+            else
+                ret = QLibraryInfoPrivate::builtinValue(loc);
+# ifndef Q_OS_WIN // On Windows we use the registry
+        } else if (loc == SettingsPath) {
+            ret = QLibraryInfoPrivate::builtinSettingsPath();
+# endif
+        }
+#else // QT_BUILD_QMAKE
         const char * volatile path = 0;
         if (loc == PrefixPath) {
-            path =
-#ifdef QT_BUILD_QMAKE
-                (group != DevicePaths) ?
-                    QT_CONFIGURE_EXT_PREFIX_PATH :
-#endif
-                    QT_CONFIGURE_PREFIX_PATH;
+            path = QT_CONFIGURE_PREFIX_PATH;
         } else if (unsigned(loc) <= sizeof(qt_configure_str_offsets)/sizeof(qt_configure_str_offsets[0])) {
             path = qt_configure_strs + qt_configure_str_offsets[loc - 1];
 #ifndef Q_OS_WIN // On Windows we use the registry
         } else if (loc == SettingsPath) {
             path = QT_CONFIGURE_SETTINGS_PATH;
-#endif
-#ifdef QT_BUILD_QMAKE
-        } else if (loc == HostPrefixPath) {
-            path = QT_CONFIGURE_HOST_PREFIX_PATH;
 #endif
         }
 
         if (path)
             ret = QString::fromLocal8Bit(path);
+#endif
     }
 
 #ifdef QT_BUILD_QMAKE
diff --git a/src/corelib/global/qlibraryinfo.h b/src/corelib/global/qlibraryinfo.h
index 55be7063824..9d794ce1da9 100644
--- a/src/corelib/global/qlibraryinfo.h
+++ b/src/corelib/global/qlibraryinfo.h
@@ -96,6 +96,7 @@ public:
         HostDataPath,
         TargetSpecPath,
         HostSpecPath,
+        ExtPrefixPath,
         HostPrefixPath,
         LastHostPath = HostPrefixPath,
 #endif
@@ -105,6 +106,7 @@ public:
 #ifdef QT_BUILD_QMAKE
     enum PathGroup { FinalPaths, EffectivePaths, EffectiveSourcePaths, DevicePaths };
     static QString rawLocation(LibraryLocation, PathGroup);
+    static void reload();
 #endif
 
     static QStringList platformPluginArguments(const QString &platformName);
diff --git a/tools/configure/configureapp.cpp b/tools/configure/configureapp.cpp
index 49dab2fcd49..630e58d8189 100644
--- a/tools/configure/configureapp.cpp
+++ b/tools/configure/configureapp.cpp
@@ -48,14 +48,6 @@
 
 QT_BEGIN_NAMESPACE
 
-enum Platforms {
-    WINDOWS,
-    WINDOWS_RT,
-    QNX,
-    ANDROID,
-    OTHER
-};
-
 std::ostream &operator<<(std::ostream &s, const QString &val) {
     s << val.toLocal8Bit().data();
     return s;
@@ -84,19 +76,12 @@ Configure::Configure(int& argc, char** argv)
         sourceDir = sourcePathInfo.dir();
     }
     buildPath = QDir::currentPath();
-#if 0
-    const QString installPath = QString("C:\\Qt\\%1").arg(QT_VERSION_STR);
-#else
-    const QString installPath = buildPath;
-#endif
     if (sourceDir != buildDir) { //shadow builds!
         QDir(buildPath).mkpath("bin");
 
         buildDir.mkpath("mkspecs");
     }
 
-    dictionary[ "QT_INSTALL_PREFIX" ] = installPath;
-
     if (dictionary[ "QMAKESPEC" ].size() == 0) {
         dictionary[ "QMAKESPEC" ] = Environment::detectQMakeSpec();
         dictionary[ "QMAKESPEC_FROM" ] = "detected";
@@ -104,9 +89,6 @@ Configure::Configure(int& argc, char** argv)
 
     dictionary[ "SYNCQT" ]          = "auto";
 
-    //Only used when cross compiling.
-    dictionary[ "QT_INSTALL_SETTINGS" ] = "/etc/xdg";
-
     QString tmp = dictionary[ "QMAKESPEC" ];
     if (tmp.contains("\\")) {
         tmp = tmp.mid(tmp.lastIndexOf("\\") + 1);
@@ -197,148 +179,6 @@ void Configure::parseCmdLine()
         else if (configCmdLine.at(i) == "-no-syncqt")
             dictionary[ "SYNCQT" ] = "no";
 
-        // Directories ----------------------------------------------
-        else if (configCmdLine.at(i) == "-prefix") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_PREFIX" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-bindir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_BINS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-libexecdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_LIBEXECS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-libdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_LIBS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-docdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_DOCS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-headerdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_HEADERS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-plugindir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_PLUGINS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-importdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_IMPORTS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-qmldir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_QML" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-archdatadir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_ARCHDATA" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-datadir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_DATA" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-translationdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_TRANSLATIONS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-examplesdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_EXAMPLES" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-testsdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_INSTALL_TESTS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-sysroot") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "CFG_SYSROOT" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-hostprefix") {
-            ++i;
-            if (i == argCount || configCmdLine.at(i).startsWith('-'))
-                dictionary[ "QT_HOST_PREFIX" ] = buildPath;
-            else
-                dictionary[ "QT_HOST_PREFIX" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-hostbindir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_HOST_BINS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-hostlibdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_HOST_LIBS" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-hostdatadir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_HOST_DATA" ] = configCmdLine.at(i);
-        }
-
-        else if (configCmdLine.at(i) == "-extprefix") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary[ "QT_EXT_PREFIX" ] = configCmdLine.at(i);
-        }
-
         else if (configCmdLine.at(i) == "-make-tool") {
             ++i;
             if (i == argCount)
@@ -346,13 +186,6 @@ void Configure::parseCmdLine()
             dictionary[ "MAKE" ] = configCmdLine.at(i);
         }
 
-        else if (configCmdLine.at(i) == "-sysconfdir") {
-            ++i;
-            if (i == argCount)
-                break;
-            dictionary["QT_INSTALL_SETTINGS"] = configCmdLine.at(i);
-        }
-
         else if (configCmdLine.at(i) == "-android-ndk") {
             ++i;
             if (i == argCount)
@@ -531,219 +364,6 @@ void Configure::generateHeaders()
     }
 }
 
-void Configure::addConfStr(int group, const QString &val)
-{
-    confStrOffsets[group] += ' ' + QString::number(confStringOff) + ',';
-    confStrings[group] += "    \"" + val + "\\0\"\n";
-    confStringOff += val.length() + 1;
-}
-
-void Configure::generateQConfigCpp()
-{
-    QString hostSpec = dictionary["QMAKESPEC"];
-    QString targSpec = dictionary.contains("XQMAKESPEC") ? dictionary["XQMAKESPEC"] : hostSpec;
-
-    dictionary["CFG_SYSROOT"] = QDir::cleanPath(dictionary["CFG_SYSROOT"]);
-
-    bool qipempty = false;
-    if (dictionary["QT_INSTALL_PREFIX"].isEmpty())
-        qipempty = true;
-    else
-        dictionary["QT_INSTALL_PREFIX"] = QDir::cleanPath(dictionary["QT_INSTALL_PREFIX"]);
-
-    bool sysrootifyPrefix;
-    if (dictionary["QT_EXT_PREFIX"].isEmpty()) {
-        dictionary["QT_EXT_PREFIX"] = dictionary["QT_INSTALL_PREFIX"];
-        sysrootifyPrefix = !dictionary["CFG_SYSROOT"].isEmpty();
-    } else {
-        dictionary["QT_EXT_PREFIX"] = QDir::cleanPath(dictionary["QT_EXT_PREFIX"]);
-        sysrootifyPrefix = false;
-    }
-
-    bool haveHpx;
-    if (dictionary["QT_HOST_PREFIX"].isEmpty()) {
-        dictionary["QT_HOST_PREFIX"] = (sysrootifyPrefix ? dictionary["CFG_SYSROOT"] : QString())
-                                       + dictionary["QT_INSTALL_PREFIX"];
-        haveHpx = false;
-    } else {
-        dictionary["QT_HOST_PREFIX"] = QDir::cleanPath(dictionary["QT_HOST_PREFIX"]);
-        haveHpx = true;
-    }
-
-    static const struct {
-        const char *basevar, *baseoption, *var, *option;
-    } varmod[] = {
-        { "INSTALL_", "-prefix", "DOCS", "-docdir" },
-        { "INSTALL_", "-prefix", "HEADERS", "-headerdir" },
-        { "INSTALL_", "-prefix", "LIBS", "-libdir" },
-        { "INSTALL_", "-prefix", "LIBEXECS", "-libexecdir" },
-        { "INSTALL_", "-prefix", "BINS", "-bindir" },
-        { "INSTALL_", "-prefix", "PLUGINS", "-plugindir" },
-        { "INSTALL_", "-prefix", "IMPORTS", "-importdir" },
-        { "INSTALL_", "-prefix", "QML", "-qmldir" },
-        { "INSTALL_", "-prefix", "ARCHDATA", "-archdatadir" },
-        { "INSTALL_", "-prefix", "DATA", "-datadir" },
-        { "INSTALL_", "-prefix", "TRANSLATIONS", "-translationdir" },
-        { "INSTALL_", "-prefix", "EXAMPLES", "-examplesdir" },
-        { "INSTALL_", "-prefix", "TESTS", "-testsdir" },
-        { "INSTALL_", "-prefix", "SETTINGS", "-sysconfdir" },
-        { "HOST_", "-hostprefix", "BINS", "-hostbindir" },
-        { "HOST_", "-hostprefix", "LIBS", "-hostlibdir" },
-        { "HOST_", "-hostprefix", "DATA", "-hostdatadir" },
-    };
-
-    bool prefixReminder = false;
-    for (uint i = 0; i < sizeof(varmod) / sizeof(varmod[0]); i++) {
-        QString path = QDir::cleanPath(
-                    dictionary[QLatin1String("QT_") + varmod[i].basevar + varmod[i].var]);
-        if (path.isEmpty())
-            continue;
-        QString base = dictionary[QLatin1String("QT_") + varmod[i].basevar + "PREFIX"];
-        if (!path.startsWith(base)) {
-            if (i != 13) {
-                dictionary["PREFIX_COMPLAINTS"] += QLatin1String("\n        NOTICE: ")
-                        + varmod[i].option + " is not a subdirectory of " + varmod[i].baseoption + ".";
-                if (i < 13 ? qipempty : !haveHpx)
-                    prefixReminder = true;
-            }
-        } else {
-            path.remove(0, base.size());
-            if (path.startsWith('/'))
-                path.remove(0, 1);
-        }
-        dictionary[QLatin1String("QT_REL_") + varmod[i].basevar + varmod[i].var]
-                = path.isEmpty() ? "." : path;
-    }
-    if (prefixReminder) {
-        dictionary["PREFIX_COMPLAINTS"]
-                += "\n        Maybe you forgot to specify -prefix/-hostprefix?";
-    }
-
-    if (!qipempty) {
-        // If QT_INSTALL_* have not been specified on the command line,
-        // default them here, unless prefix is empty (WinCE).
-
-        if (dictionary["QT_REL_INSTALL_HEADERS"].isEmpty())
-            dictionary["QT_REL_INSTALL_HEADERS"] = "include";
-
-        if (dictionary["QT_REL_INSTALL_LIBS"].isEmpty())
-            dictionary["QT_REL_INSTALL_LIBS"] = "lib";
-
-        if (dictionary["QT_REL_INSTALL_BINS"].isEmpty())
-            dictionary["QT_REL_INSTALL_BINS"] = "bin";
-
-        if (dictionary["QT_REL_INSTALL_ARCHDATA"].isEmpty())
-            dictionary["QT_REL_INSTALL_ARCHDATA"] = ".";
-        if (dictionary["QT_REL_INSTALL_ARCHDATA"] != ".")
-            dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] = dictionary["QT_REL_INSTALL_ARCHDATA"] + '/';
-
-        if (dictionary["QT_REL_INSTALL_LIBEXECS"].isEmpty()) {
-            if (targSpec.startsWith("win"))
-                dictionary["QT_REL_INSTALL_LIBEXECS"] = dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] + "bin";
-            else
-                dictionary["QT_REL_INSTALL_LIBEXECS"] = dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] + "libexec";
-        }
-
-        if (dictionary["QT_REL_INSTALL_PLUGINS"].isEmpty())
-            dictionary["QT_REL_INSTALL_PLUGINS"] = dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] + "plugins";
-
-        if (dictionary["QT_REL_INSTALL_IMPORTS"].isEmpty())
-            dictionary["QT_REL_INSTALL_IMPORTS"] = dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] + "imports";
-
-        if (dictionary["QT_REL_INSTALL_QML"].isEmpty())
-            dictionary["QT_REL_INSTALL_QML"] = dictionary["QT_REL_INSTALL_ARCHDATA_PREFIX"] + "qml";
-
-        if (dictionary["QT_REL_INSTALL_DATA"].isEmpty())
-            dictionary["QT_REL_INSTALL_DATA"] = ".";
-        if (dictionary["QT_REL_INSTALL_DATA"] != ".")
-            dictionary["QT_REL_INSTALL_DATA_PREFIX"] = dictionary["QT_REL_INSTALL_DATA"] + '/';
-
-        if (dictionary["QT_REL_INSTALL_DOCS"].isEmpty())
-            dictionary["QT_REL_INSTALL_DOCS"] = dictionary["QT_REL_INSTALL_DATA_PREFIX"] + "doc";
-
-        if (dictionary["QT_REL_INSTALL_TRANSLATIONS"].isEmpty())
-            dictionary["QT_REL_INSTALL_TRANSLATIONS"] = dictionary["QT_REL_INSTALL_DATA_PREFIX"] + "translations";
-
-        if (dictionary["QT_REL_INSTALL_EXAMPLES"].isEmpty())
-            dictionary["QT_REL_INSTALL_EXAMPLES"] = "examples";
-
-        if (dictionary["QT_REL_INSTALL_TESTS"].isEmpty())
-            dictionary["QT_REL_INSTALL_TESTS"] = "tests";
-    }
-
-    if (dictionary["QT_REL_HOST_BINS"].isEmpty())
-        dictionary["QT_REL_HOST_BINS"] = haveHpx ? "bin" : dictionary["QT_REL_INSTALL_BINS"];
-
-    if (dictionary["QT_REL_HOST_LIBS"].isEmpty())
-        dictionary["QT_REL_HOST_LIBS"] = haveHpx ? "lib" : dictionary["QT_REL_INSTALL_LIBS"];
-
-    if (dictionary["QT_REL_HOST_DATA"].isEmpty())
-        dictionary["QT_REL_HOST_DATA"] = haveHpx ? "." : dictionary["QT_REL_INSTALL_ARCHDATA"];
-
-    confStringOff = 0;
-    addConfStr(0, dictionary["QT_REL_INSTALL_DOCS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_HEADERS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_LIBS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_LIBEXECS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_BINS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_PLUGINS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_IMPORTS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_QML"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_ARCHDATA"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_DATA"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_TRANSLATIONS"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_EXAMPLES"]);
-    addConfStr(0, dictionary["QT_REL_INSTALL_TESTS"]);
-    addConfStr(1, dictionary["CFG_SYSROOT"]);
-    addConfStr(1, dictionary["QT_REL_HOST_BINS"]);
-    addConfStr(1, dictionary["QT_REL_HOST_LIBS"]);
-    addConfStr(1, dictionary["QT_REL_HOST_DATA"]);
-    addConfStr(1, targSpec);
-    addConfStr(1, hostSpec);
-
-    // Generate the new qconfig.cpp file
-    {
-        FileWriter tmpStream(buildPath + "/src/corelib/global/qconfig.cpp");
-        tmpStream << "/* Build date */" << endl
-                  << "static const char qt_configure_installation          [11  + 12] = \"qt_instdate=2012-12-20\";" << endl
-                  << endl
-                  << "/* Installation Info */" << endl
-                  << "static const char qt_configure_prefix_path_str       [512 + 12] = \"qt_prfxpath=" << dictionary["QT_INSTALL_PREFIX"] << "\";" << endl
-                  << "#ifdef QT_BUILD_QMAKE" << endl
-                  << "static const char qt_configure_ext_prefix_path_str   [512 + 12] = \"qt_epfxpath=" << dictionary["QT_EXT_PREFIX"] << "\";" << endl
-                  << "static const char qt_configure_host_prefix_path_str  [512 + 12] = \"qt_hpfxpath=" << dictionary["QT_HOST_PREFIX"] << "\";" << endl
-                  << "#endif" << endl
-                  << endl
-                  << "static const short qt_configure_str_offsets[] = {\n"
-                  << "    " << confStrOffsets[0] << endl
-                  << "#ifdef QT_BUILD_QMAKE\n"
-                  << "    " << confStrOffsets[1] << endl
-                  << "#endif\n"
-                  << "};\n"
-                  << "static const char qt_configure_strs[] =\n"
-                  << confStrings[0] << "#ifdef QT_BUILD_QMAKE\n"
-                  << confStrings[1] << "#endif\n"
-                  << ";\n"
-                  << endl;
-        if ((platform() != WINDOWS) && (platform() != WINDOWS_RT))
-            tmpStream << "#define QT_CONFIGURE_SETTINGS_PATH \"" << dictionary["QT_REL_INSTALL_SETTINGS"] << "\"" << endl;
-
-        tmpStream << endl
-                  << "#ifdef QT_BUILD_QMAKE\n"
-                  << "# define QT_CONFIGURE_SYSROOTIFY_PREFIX " << (sysrootifyPrefix ? "true" : "false") << endl
-                  << "#endif\n\n"
-                  << endl
-                  << "#define QT_CONFIGURE_PREFIX_PATH qt_configure_prefix_path_str + 12\n"
-                  << "#ifdef QT_BUILD_QMAKE\n"
-                  << "# define QT_CONFIGURE_EXT_PREFIX_PATH qt_configure_ext_prefix_path_str + 12\n"
-                  << "# define QT_CONFIGURE_HOST_PREFIX_PATH qt_configure_host_prefix_path_str + 12\n"
-                  << "#endif\n";
-
-        if (!tmpStream.flush())
-            dictionary[ "DONE" ] = "error";
-    }
-}
-
 void Configure::buildQmake()
 {
     {
@@ -841,7 +461,11 @@ void Configure::buildQmake()
     if (confFile.open(QFile::WriteOnly | QFile::Text)) { // Truncates any existing file.
         QTextStream confStream(&confFile);
         confStream << "[EffectivePaths]" << endl
-                   << "Prefix=.." << endl;
+                   << "Prefix=.." << endl
+                   << "[Paths]" << endl
+                   << "TargetSpec=" << (dictionary.contains("XQMAKESPEC")
+                                        ? dictionary["XQMAKESPEC"] : dictionary["QMAKESPEC"]) << endl
+                   << "HostSpec=" << dictionary["QMAKESPEC"] << endl;
         if (sourcePath != buildPath)
             confStream << "[EffectiveSourcePaths]" << endl
                        << "Prefix=" << sourcePath << endl;
@@ -897,25 +521,6 @@ bool Configure::isOk()
     return (dictionary[ "DONE" ] != "error");
 }
 
-int Configure::platform() const
-{
-    const QString xQMakeSpec = dictionary.value("XQMAKESPEC");
-
-    if ((xQMakeSpec.startsWith("winphone") || xQMakeSpec.startsWith("winrt")))
-        return WINDOWS_RT;
-
-    if (xQMakeSpec.contains("qnx"))
-        return QNX;
-
-    if (xQMakeSpec.contains("android"))
-        return ANDROID;
-
-    if (!xQMakeSpec.isEmpty())
-        return OTHER;
-
-    return WINDOWS;
-}
-
 FileWriter::FileWriter(const QString &name)
     : QTextStream()
     , m_name(name)
diff --git a/tools/configure/configureapp.h b/tools/configure/configureapp.h
index 755a2e26966..32ba7d34441 100644
--- a/tools/configure/configureapp.h
+++ b/tools/configure/configureapp.h
@@ -44,7 +44,6 @@ public:
 
     void parseCmdLine();
 
-    void generateQConfigCpp();
     void buildQmake();
 
     void prepareConfigureInput();
@@ -56,8 +55,6 @@ public:
     bool isDone();
     bool isOk();
 
-    int platform() const;
-
 private:
     int verbose;
 
@@ -72,11 +69,6 @@ private:
     QString sourcePathMangled, buildPathMangled;
     QDir sourceDir, buildDir;
 
-    QString confStrOffsets[2];
-    QString confStrings[2];
-    int confStringOff;
-
-    void addConfStr(int group, const QString &val);
     QString formatPath(const QString &path);
 
     bool reloadCmdLine(int idx);
diff --git a/tools/configure/main.cpp b/tools/configure/main.cpp
index 3fce934da58..e4b9c12e3d7 100644
--- a/tools/configure/main.cpp
+++ b/tools/configure/main.cpp
@@ -45,9 +45,6 @@ int runConfigure( int argc, char** argv )
     if (!app.isOk())
         return 3;
 
-    // Source file with path settings. Needed by qmake.
-    app.generateQConfigCpp();
-
     // Bootstrapped includes. Needed by qmake.
     app.generateHeaders();
     if (!app.isOk())