print help right after parsing command line

is the only sane thing, and now that there are no dependencies on
anything else any more (in particular anything slow or side effect
laden), we can actually do it.

this removes some nasty OPT_HELP checks spread throughout the code, thus
further reducing data dependencies.

Change-Id: Ib0a00e1514e2aa25ec3b527ba9f5719e3214640b
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

1 files changed, 371 insertions, 404 deletions

diff --git a/configure b/configure
index 59c855927e..17b8b51778 100755
--- a/configure
+++ b/configure
@@ -2433,11 +2433,378 @@ done
 [ "x$ERROR" = "xyes" ] && exit 1
 
 #-------------------------------------------------------------------------------
-# build tree initialization
+# help - interactive parts of the script _after_ this section please
 #-------------------------------------------------------------------------------
 
-### skip this if the user just needs help...
-if [ "$OPT_HELP" != "yes" ]; then
+if [ "$OPT_HELP" = "yes" ]; then
+    cat <<EOF
+Usage:  $relconf [options]
+
+Installation options:
+
+ These are optional, but you may specify install directories.
+
+    -prefix <dir> ...... This will install everything relative to <dir>
+                         (default /usr/local/Qt-${QT_VERSION}, \$PWD if -developer-build is active)
+
+    -extprefix <dir> ... When -sysroot is used, install everything to <dir>,
+                         rather than into SYSROOT/PREFIX.
+
+    -hostprefix [dir] .. Tools and libraries needed when developing
+                         applications are installed in [dir]. If [dir] is
+                         not given, the current build directory will be used.
+                         (default EXTPREFIX)
+
+ You may use these to separate different parts of the install:
+
+    -bindir <dir> ......... User executables will be installed to <dir>
+                            (default PREFIX/bin)
+    -headerdir <dir> ...... Headers will be installed to <dir>
+                            (default PREFIX/include)
+    -libdir <dir> ......... Libraries will be installed to <dir>
+                            (default PREFIX/lib)
+    -archdatadir <dir> .... Arch-dependent data used by Qt will be installed to <dir>
+                            (default PREFIX)
+    -plugindir <dir> ...... Plugins will be installed to <dir>
+                            (default ARCHDATADIR/plugins)
+    -libexecdir <dir> ..... Program executables will be installed to <dir>
+                            (default ARCHDATADIR/libexec, ARCHDATADIR/bin for MinGW)
+    -importdir <dir> ...... Imports for QML1 will be installed to <dir>
+                            (default ARCHDATADIR/imports)
+    -qmldir <dir> ......... Imports for QML2 will be installed to <dir>
+                            (default ARCHDATADIR/qml)
+    -datadir <dir> ........ Arch-independent data used by Qt will be installed to <dir>
+                            (default PREFIX)
+    -docdir <dir> ......... Documentation will be installed to <dir>
+                            (default DATADIR/doc)
+    -translationdir <dir> . Translations of Qt programs will be installed to <dir>
+                            (default DATADIR/translations)
+    -sysconfdir <dir> ..... Settings used by Qt programs will be looked for in <dir>
+                            (default PREFIX/etc/xdg)
+    -examplesdir <dir> .... Examples will be installed to <dir>
+                            (default PREFIX/examples)
+    -testsdir <dir> ....... Tests will be installed to <dir>
+                            (default PREFIX/tests)
+
+    -hostbindir <dir> .. Host executables will be installed to <dir>
+                         (default HOSTPREFIX/bin)
+    -hostlibdir <dir> .. Host libraries will be installed to <dir>
+                         (default HOSTPREFIX/lib)
+    -hostdatadir <dir> . Data used by qmake will be installed to <dir>
+                         (default HOSTPREFIX)
+
+Configure options:
+
+ The defaults (*) are usually acceptable. A plus (+) denotes a default value
+ that needs to be evaluated. If the evaluation succeeds, the feature is
+ included. Here is a short explanation of each option:
+
+ *  -release ........... Compile and link Qt with debugging turned off.
+    -debug ............. Compile and link Qt with debugging turned on.
+    -debug-and-release . Compile and link two versions of Qt, with and without
+                         debugging turned on (Mac only).
+
+    -force-debug-info .. Create symbol files for release builds.
+
+    -developer-build ... Compile and link Qt with Qt developer options (including auto-tests exporting)
+
+    -opensource ........ Compile and link the Open-Source Edition of Qt.
+    -commercial ........ Compile and link the Commercial Edition of Qt.
+
+    -confirm-license ... Automatically acknowledge the license (use with
+                         either -opensource or -commercial)
+
+    -no-c++11 .......... Do not compile Qt with C++11 support enabled.
+ +  -c++11 ............. Compile Qt with C++11 support enabled.
+
+ *  -shared ............ Create and use shared Qt libraries.
+    -static ............ Create and use static Qt libraries.
+
+ *  -process ........... Generate only a top-level Makefile.
+    -fully-process ..... Generate Makefiles for the entire Qt tree.
+    -dont-process ...... Do not generate any Makefiles.
+
+    -no-largefile ...... Disables large file support.
+ +  -largefile ......... Enables Qt to access files larger than 4 GB.
+
+    -no-accessibility .. Do not compile Accessibility support.
+                         Disabling accessibility is not recommended, as it will break QStyle
+                         and may break other internal parts of Qt.
+                         With this switch you create a source incompatible version of Qt,
+                         which is unsupported.
+ +  -accessibility ..... Compile Accessibility support.
+
+    -no-sql-<driver> ... Disable SQL <driver> entirely.
+    -qt-sql-<driver> ... Enable a SQL <driver> in the Qt SQL module, by default
+                         none are turned on.
+    -plugin-sql-<driver> Enable SQL <driver> as a plugin to be linked to
+                         at run time.
+
+                         Possible values for <driver>:
+                         [$CFG_SQL_AVAILABLE ]
+
+    -system-sqlite ..... Use sqlite from the operating system.
+
+    -no-javascript-jit . Do not build the JavaScriptCore JIT compiler.
+ +  -javascript-jit .... Build the JavaScriptCore JIT compiler.
+
+    -no-qml-debug ...... Do not build the in-process QML debugging support.
+ +  -qml-debug ......... Build the QML debugging support.
+
+    -platform target ... The operating system and compiler you are building
+                         on (default detected from host system).
+
+                         See the README file for a list of supported
+                         operating systems and compilers.
+
+    -no-sse2 ........... Do not compile with use of SSE2 instructions.
+    -no-sse3 ........... Do not compile with use of SSE3 instructions.
+    -no-ssse3 .......... Do not compile with use of SSSE3 instructions.
+    -no-sse4.1 ......... Do not compile with use of SSE4.1 instructions.
+    -no-sse4.2 ......... Do not compile with use of SSE4.2 instructions.
+    -no-avx ............ Do not compile with use of AVX instructions.
+    -no-avx2 ........... Do not compile with use of AVX2 instructions.
+    -no-neon ........... Do not compile with use of NEON instructions.
+    -no-mips_dsp ....... Do not compile with use of MIPS DSP instructions.
+    -no-mips_dspr2 ..... Do not compile with use of MIPS DSP rev2 instructions.
+
+    -qtnamespace <name>  Wraps all Qt library code in 'namespace <name> {...}'.
+    -qtlibinfix <infix>  Renames all libQt*.so to libQt*<infix>.so.
+
+    -testcocoon ........ Instrument Qt with the TestCocoon code coverage tool.
+    -gcov .............. Instrument Qt with the GCov code coverage tool.
+
+    -D <string> ........ Add an explicit define to the preprocessor.
+    -I <string> ........ Add an explicit include path.
+    -L <string> ........ Add an explicit library path.
+
+ +  -pkg-config ........ Use pkg-config to detect include and library paths. By default,
+                         configure determines whether to use pkg-config or not with
+                         some heuristics such as checking the environment variables.
+    -no-pkg-config ..... Disable use of pkg-config.
+    -force-pkg-config .. Force usage of pkg-config (skips pkg-config usability
+                         detection heuristic).
+
+    -help, -h .......... Display this information.
+
+Third Party Libraries:
+
+    -qt-zlib ........... Use the zlib bundled with Qt.
+ +  -system-zlib ....... Use zlib from the operating system.
+                         See http://www.gzip.org/zlib
+
+    -no-gif ............ Do not compile GIF reading support.
+
+    -no-libpng ......... Do not compile PNG support.
+    -qt-libpng ......... Use the libpng bundled with Qt.
+ +  -system-libpng ..... Use libpng from the operating system.
+                         See http://www.libpng.org/pub/png
+
+    -no-libjpeg ........ Do not compile JPEG support.
+    -qt-libjpeg ........ Use the libjpeg bundled with Qt.
+ +  -system-libjpeg .... Use libjpeg from the operating system.
+                         See http://www.ijg.org
+
+    -no-freetype ....... Do not compile in Freetype2 support.
+    -qt-freetype ....... Use the libfreetype bundled with Qt.
+ +  -system-freetype.... Use the libfreetype provided by the system (enabled if -fontconfig is active).
+                         See http://www.freetype.org
+
+ *  -no-harfbuzz ....... Do not compile HarfBuzz-NG support.
+    -qt-harfbuzz ....... (experimental) Use HarfBuzz-NG bundled with Qt
+                         to do text shaping. It can still be disabled
+                         by setting QT_HARFBUZZ environment variable to "old".
+    -system-harfbuzz ... (experimental) Use HarfBuzz-NG from the operating system
+                         to do text shaping. It can still be disabled
+                         by setting QT_HARFBUZZ environment variable to "old".
+
+    -no-openssl ........ Do not compile support for OpenSSL.
+ +  -openssl ........... Enable run-time OpenSSL support.
+    -openssl-linked .... Enabled linked OpenSSL support.
+
+    -qt-pcre ........... Use the PCRE library bundled with Qt.
+ +  -system-pcre ....... Use the PCRE library from the operating system.
+
+    -qt-xcb ............ Use xcb- libraries bundled with Qt.
+                         (libxcb.so will still be used from operating system).
+ +  -system-xcb ........ Use xcb- libraries from the operating system.
+
+    -qt-xkbcommon ...... Use the xkbcommon library bundled with Qt.
+ +  -system-xkbcommon .. Use the xkbcommon library from the operating system.
+
+    -no-xinput2 ........ Do not compile XInput2 support.
+ *  -xinput2 ........... Compile XInput2 support.
+
+    -no-glib ........... Do not compile Glib support.
+ +  -glib .............. Compile Glib support.
+
+Additional options:
+
+    -make <part> ....... Add part to the list of parts to be built at make time.
+                         (defaults to: $QT_DEFAULT_BUILD_PARTS)
+    -nomake <part> ..... Exclude part from the list of parts to be built.
+
+    -skip <module> ..... Exclude an entire module from the build.
+
+    -no-compile-examples ... Install only the sources of examples.
+
+    -no-gui ............ Don't build the Qt GUI module and dependencies.
+ +  -gui ............... Build the Qt GUI module and dependencies.
+
+    -no-widgets ........ Don't build the Qt Widgets module and dependencies.
+ +  -widgets ........... Build the Qt Widgets module and dependencies.
+
+    -R <string> ........ Add an explicit runtime library path to the Qt
+                         libraries.
+    -l <string> ........ Add an explicit library.
+
+    -no-rpath .......... Do not use the library install path as a runtime
+                         library path.
+ +  -rpath ............. Link Qt libraries and executables using the library
+                         install path as a runtime library path. Equivalent
+                         to -R install_libpath
+
+    -continue .......... Continue as far as possible if an error occurs.
+
+    -verbose, -v ....... Print verbose information about each step of the
+                         configure process.
+
+    -silent ............ Reduce the build output so that warnings and errors
+                         can be seen more easily.
+
+ *  -no-optimized-qmake ... Do not build qmake optimized.
+    -optimized-qmake ...... Build qmake optimized.
+
+    -no-nis ............ Do not compile NIS support.
+ *  -nis ............... Compile NIS support.
+
+    -no-cups ........... Do not compile CUPS support.
+ *  -cups .............. Compile CUPS support.
+                         Requires cups/cups.h and libcups.so.2.
+
+    -no-iconv .......... Do not compile support for iconv(3).
+ *  -iconv ............. Compile support for iconv(3).
+
+    -no-icu ............ Do not compile support for ICU libraries.
+ +  -icu ............... Compile support for ICU libraries.
+
+    -no-fontconfig ..... Do not compile FontConfig support.
+ +  -fontconfig ........ Compile FontConfig support.
+
+    -no-strip .......... Do not strip binaries and libraries of unneeded symbols.
+ *  -strip ............. Strip binaries and libraries of unneeded symbols when installing.
+
+ *  -no-pch ............ Do not use precompiled header support.
+    -pch ............... Use precompiled header support.
+
+    -no-dbus ........... Do not compile the Qt D-Bus module.
+ +  -dbus .............. Compile the Qt D-Bus module and dynamically load libdbus-1.
+    -dbus-linked ....... Compile the Qt D-Bus module and link to libdbus-1.
+
+    -reduce-relocations ..... Reduce relocations in the libraries through extra
+                              linker optimizations (Qt/X11 and Qt for Embedded Linux only;
+                              experimental; needs GNU ld >= 2.18).
+
+    -force-asserts ........ Force Q_ASSERT to be enabled even in release builds.
+
+    -device <name> ............... Cross-compile for device <name> (experimental)
+    -device-option <key=value> ... Add device specific options for the device mkspec
+                                   (experimental)
+
+    -no-separate-debug-info . Do not store debug information in a separate file.
+ *  -separate-debug-info .... Strip debug information into a separate file.
+
+    -no-xcb ............ Do not compile Xcb (X protocol C-language Binding) support.
+ *  -xcb ............... Compile Xcb support.
+
+    -no-eglfs .......... Do not compile EGLFS (EGL Full Screen/Single Surface) support.
+ *  -eglfs ............. Compile EGLFS support (Requires OpenGL ES 2 support).
+
+    -no-directfb ....... Do not compile DirectFB support.
+ *  -directfb .......... Compile DirectFB support.
+
+    -no-linuxfb ........ Do not compile Linux Framebuffer support.
+ *  -linuxfb ........... Compile Linux Framebuffer support.
+
+    -no-kms ............ Do not compile KMS support.
+ *  -kms ............... Compile KMS support (Requires EGL and OpenGL ES 2 support).
+
+    -qpa <name> ......... Sets the default QPA platform (e.g xcb, cocoa, windows).
+
+    -xplatform target ... The target platform when cross-compiling.
+
+    -sysroot <dir> ...... Sets <dir> as the target compiler's and qmake's sysroot and also sets pkg-config paths.
+    -no-gcc-sysroot ..... When using -sysroot, it disables the passing of --sysroot to the compiler
+
+    -no-feature-<feature> Do not compile in <feature>.
+    -feature-<feature> .. Compile in <feature>. The available features
+                          are described in src/corelib/global/qfeatures.txt
+
+    -qconfig local ...... Use src/corelib/global/qconfig-local.h rather than the
+                          default ($CFG_QCONFIG).
+
+    -qreal [double|float] typedef qreal to the specified type. The default is double.
+                          Note that changing this flag affects binary compatibility.
+
+    -no-opengl .......... Do not support OpenGL.
+    -opengl <api> ....... Enable OpenGL support
+                          With no parameter, this will attempt to auto-detect
+                          OpenGL ES 2, or regular desktop OpenGL.
+                          Use es2 for <api> to override auto-detection.
+
+ *  -no-system-proxies .. Do not use system network proxies by default.
+    -system-proxies ..... Use system network proxies by default.
+
+    -no-warnings-are-errors Make warnings be treated normally
+    -warnings-are-errors  Make warnings be treated as errors
+                          (enabled if -developer-build is active)
+
+QNX/Blackberry options:
+
+    -no-slog2 .......... Do not compile with slog2 support.
+    -slog2 ............. Compile with slog2 support.
+
+MacOS/iOS options:
+
+    -Fstring ........... Add an explicit framework path.
+    -fw string ......... Add an explicit framework.
+
+ *  -framework ......... Build Qt as a series of frameworks and
+                         link tools against those frameworks.
+    -no-framework ...... Do not build Qt as a series of frameworks.
+
+    -sdk <sdk> ......... Build Qt using Apple provided SDK <sdk>. The argument should be
+                         one of the available SDKs as listed by 'xcodebuild -showsdks'.
+                         Note that the argument applies only to Qt libraries and applications built
+                         using the target mkspec - not host tools such as qmake, moc, rcc, etc.
+
+Android options:
+
+    -android-sdk path .............. The Android SDK root path.
+                                     (default \$ANDROID_SDK_ROOT)
+
+    -android-ndk path .............. The Android NDK root path.
+                                     (default \$ANDROID_NDK_ROOT)
+
+    -android-ndk-platform .......... Sets the android platform
+                                     (default $CFG_DEFAULT_ANDROID_PLATFORM)
+
+    -android-ndk-host .............. Sets the android NDK host (linux-x86, linux-x86_64, etc.)
+                                     (default \$ANDROID_NDK_HOST)
+
+    -android-arch .................. Sets the android architecture (armeabi, armeabi-v7a, x86, mips)
+                                     (default $CFG_DEFAULT_ANDROID_TARGET_ARCH)
+
+    -android-toolchain-version ..... Sets the android toolchain version
+                                     (default $CFG_DEFAULT_ANDROID_NDK_TOOLCHAIN_VERSION)
+EOF
+
+   exit 0
+fi # Help
+
+#-------------------------------------------------------------------------------
+# build tree initialization
+#-------------------------------------------------------------------------------
 
 # is this a shadow build?
 if [ "$OPT_SHADOW" = "maybe" ]; then
@@ -2477,8 +2844,6 @@ if [ ! -d "${outpath}/lib/fonts" ]; then
     fi
 fi
 
-fi ### help
-
 #-------------------------------------------------------------------------------
 # platform detection
 #-------------------------------------------------------------------------------
@@ -2640,7 +3005,6 @@ if [ -z "$PLATFORM" ]; then
         PLATFORM=unsupported/qnx-g++
         ;;
      *)
-        if [ "$OPT_HELP" != "yes" ]; then
             echo >&2
             echo "   The build script does not currently recognize all" >&2
             echo "   platforms supported by Qt." >&2
@@ -2648,7 +3012,6 @@ if [ -z "$PLATFORM" ]; then
             echo "   set the system/compiler combination you use." >&2
             echo >&2
             exit 2
-        fi
     esac
 fi
 
@@ -2740,7 +3103,6 @@ if [ "$XPLATFORM_ANDROID" = "yes" ]; then
         esac
     fi
 
-    if [ "$OPT_HELP" != "yes" ]; then
         if [ -z "$CFG_DEFAULT_ANDROID_NDK_ROOT" ]; then
             echo
             echo "Can not find Android NDK. Please use -android-ndk option to specify one"
@@ -2771,7 +3133,6 @@ if [ "$XPLATFORM_ANDROID" = "yes" ]; then
         DeviceVar set DEFAULT_ANDROID_NDK_HOST "$CFG_DEFAULT_ANDROID_NDK_HOST"
         DeviceVar set DEFAULT_ANDROID_TARGET_ARCH "$CFG_DEFAULT_ANDROID_TARGET_ARCH"
         DeviceVar set DEFAULT_ANDROID_NDK_TOOLCHAIN_VERSION "$CFG_DEFAULT_ANDROID_NDK_TOOLCHAIN_VERSION"
-    fi
 fi
 
 if [ -d "$PLATFORM" ]; then
@@ -2898,7 +3259,7 @@ QMAKE_CONF_COMPILER=`getXQMakeConf QMAKE_CXX`
 
 TEST_COMPILER=$QMAKE_CONF_COMPILER
 
-if [ "$OPT_HELP" != "yes" ] && [ "$XPLATFORM_ANDROID" = "yes" ] ; then
+if [ "$XPLATFORM_ANDROID" = "yes" ] ; then
     ANDROID_NDK_TOOLS_PREFIX=
     ANDROID_PLATFORM_ARCH=
     case $CFG_DEFAULT_ANDROID_TARGET_ARCH in
@@ -3279,400 +3640,6 @@ if [ "$CFG_COMPILE_EXAMPLES" = "yes" ]; then
     QMAKE_CONFIG="$QMAKE_CONFIG compile_examples"
 fi
 
-#-------------------------------------------------------------------------------
-# help - interactive parts of the script _after_ this section please
-#-------------------------------------------------------------------------------
-
-if [ "$OPT_HELP" = "yes" ]; then
-    cat <<EOF
-Usage:  $relconf [options]
-
-Installation options:
-
- These are optional, but you may specify install directories.
-
-    -prefix <dir> ...... This will install everything relative to <dir>
-                         (default /usr/local/Qt-${QT_VERSION}, \$PWD if -developer-build is active)
-
-    -extprefix <dir> ... When -sysroot is used, install everything to <dir>,
-                         rather than into SYSROOT/PREFIX.
-
-    -hostprefix [dir] .. Tools and libraries needed when developing
-                         applications are installed in [dir]. If [dir] is
-                         not given, the current build directory will be used.
-                         (default EXTPREFIX)
-
- You may use these to separate different parts of the install:
-
-    -bindir <dir> ......... User executables will be installed to <dir>
-                            (default PREFIX/bin)
-    -headerdir <dir> ...... Headers will be installed to <dir>
-                            (default PREFIX/include)
-    -libdir <dir> ......... Libraries will be installed to <dir>
-                            (default PREFIX/lib)
-    -archdatadir <dir> .... Arch-dependent data used by Qt will be installed to <dir>
-                            (default PREFIX)
-    -plugindir <dir> ...... Plugins will be installed to <dir>
-                            (default ARCHDATADIR/plugins)
-    -libexecdir <dir> ..... Program executables will be installed to <dir>
-                            (default ARCHDATADIR/libexec, ARCHDATADIR/bin for MinGW)
-    -importdir <dir> ...... Imports for QML1 will be installed to <dir>
-                            (default ARCHDATADIR/imports)
-    -qmldir <dir> ......... Imports for QML2 will be installed to <dir>
-                            (default ARCHDATADIR/qml)
-    -datadir <dir> ........ Arch-independent data used by Qt will be installed to <dir>
-                            (default PREFIX)
-    -docdir <dir> ......... Documentation will be installed to <dir>
-                            (default DATADIR/doc)
-    -translationdir <dir> . Translations of Qt programs will be installed to <dir>
-                            (default DATADIR/translations)
-    -sysconfdir <dir> ..... Settings used by Qt programs will be looked for in <dir>
-                            (default PREFIX/etc/xdg)
-    -examplesdir <dir> .... Examples will be installed to <dir>
-                            (default PREFIX/examples)
-    -testsdir <dir> ....... Tests will be installed to <dir>
-                            (default PREFIX/tests)
-
-    -hostbindir <dir> .. Host executables will be installed to <dir>
-                         (default HOSTPREFIX/bin)
-    -hostlibdir <dir> .. Host libraries will be installed to <dir>
-                         (default HOSTPREFIX/lib)
-    -hostdatadir <dir> . Data used by qmake will be installed to <dir>
-                         (default HOSTPREFIX)
-
-Configure options:
-
- The defaults (*) are usually acceptable. A plus (+) denotes a default value
- that needs to be evaluated. If the evaluation succeeds, the feature is
- included. Here is a short explanation of each option:
-
- *  -release ........... Compile and link Qt with debugging turned off.
-    -debug ............. Compile and link Qt with debugging turned on.
-    -debug-and-release . Compile and link two versions of Qt, with and without
-                         debugging turned on (Mac only).
-
-    -force-debug-info .. Create symbol files for release builds.
-
-    -developer-build ... Compile and link Qt with Qt developer options (including auto-tests exporting)
-
-    -opensource ........ Compile and link the Open-Source Edition of Qt.
-    -commercial ........ Compile and link the Commercial Edition of Qt.
-
-    -confirm-license ... Automatically acknowledge the license (use with
-                         either -opensource or -commercial)
-
-    -no-c++11 .......... Do not compile Qt with C++11 support enabled.
- +  -c++11 ............. Compile Qt with C++11 support enabled.
-
- *  -shared ............ Create and use shared Qt libraries.
-    -static ............ Create and use static Qt libraries.
-
- *  -process ........... Generate only a top-level Makefile.
-    -fully-process ..... Generate Makefiles for the entire Qt tree.
-    -dont-process ...... Do not generate any Makefiles.
-
-    -no-largefile ...... Disables large file support.
- +  -largefile ......... Enables Qt to access files larger than 4 GB.
-
-    -no-accessibility .. Do not compile Accessibility support.
-                         Disabling accessibility is not recommended, as it will break QStyle
-                         and may break other internal parts of Qt.
-                         With this switch you create a source incompatible version of Qt,
-                         which is unsupported.
- +  -accessibility ..... Compile Accessibility support.
-
-    -no-sql-<driver> ... Disable SQL <driver> entirely.
-    -qt-sql-<driver> ... Enable a SQL <driver> in the Qt SQL module, by default
-                         none are turned on.
-    -plugin-sql-<driver> Enable SQL <driver> as a plugin to be linked to
-                         at run time.
-
-                         Possible values for <driver>:
-                         [$CFG_SQL_AVAILABLE ]
-
-    -system-sqlite ..... Use sqlite from the operating system.
-
-    -no-javascript-jit . Do not build the JavaScriptCore JIT compiler.
- +  -javascript-jit .... Build the JavaScriptCore JIT compiler.
-
-    -no-qml-debug ...... Do not build the in-process QML debugging support.
- +  -qml-debug ......... Build the QML debugging support.
-
-    -platform target ... The operating system and compiler you are building
-                         on (default detected from host system).
-
-                         See the README file for a list of supported
-                         operating systems and compilers.
-
-    -no-sse2 ........... Do not compile with use of SSE2 instructions.
-    -no-sse3 ........... Do not compile with use of SSE3 instructions.
-    -no-ssse3 .......... Do not compile with use of SSSE3 instructions.
-    -no-sse4.1 ......... Do not compile with use of SSE4.1 instructions.
-    -no-sse4.2 ......... Do not compile with use of SSE4.2 instructions.
-    -no-avx ............ Do not compile with use of AVX instructions.
-    -no-avx2 ........... Do not compile with use of AVX2 instructions.
-    -no-neon ........... Do not compile with use of NEON instructions.
-    -no-mips_dsp ....... Do not compile with use of MIPS DSP instructions.
-    -no-mips_dspr2 ..... Do not compile with use of MIPS DSP rev2 instructions.
-
-    -qtnamespace <name>  Wraps all Qt library code in 'namespace <name> {...}'.
-    -qtlibinfix <infix>  Renames all libQt*.so to libQt*<infix>.so.
-
-    -testcocoon ........ Instrument Qt with the TestCocoon code coverage tool.
-    -gcov .............. Instrument Qt with the GCov code coverage tool.
-
-    -D <string> ........ Add an explicit define to the preprocessor.
-    -I <string> ........ Add an explicit include path.
-    -L <string> ........ Add an explicit library path.
-
- +  -pkg-config ........ Use pkg-config to detect include and library paths. By default,
-                         configure determines whether to use pkg-config or not with
-                         some heuristics such as checking the environment variables.
-    -no-pkg-config ..... Disable use of pkg-config.
-    -force-pkg-config .. Force usage of pkg-config (skips pkg-config usability
-                         detection heuristic).
-
-    -help, -h .......... Display this information.
-
-Third Party Libraries:
-
-    -qt-zlib ........... Use the zlib bundled with Qt.
- +  -system-zlib ....... Use zlib from the operating system.
-                         See http://www.gzip.org/zlib
-
-    -no-gif ............ Do not compile GIF reading support.
-
-    -no-libpng ......... Do not compile PNG support.
-    -qt-libpng ......... Use the libpng bundled with Qt.
- +  -system-libpng ..... Use libpng from the operating system.
-                         See http://www.libpng.org/pub/png
-
-    -no-libjpeg ........ Do not compile JPEG support.
-    -qt-libjpeg ........ Use the libjpeg bundled with Qt.
- +  -system-libjpeg .... Use libjpeg from the operating system.
-                         See http://www.ijg.org
-
-    -no-freetype ....... Do not compile in Freetype2 support.
-    -qt-freetype ....... Use the libfreetype bundled with Qt.
- +  -system-freetype.... Use the libfreetype provided by the system (enabled if -fontconfig is active).
-                         See http://www.freetype.org
-
- *  -no-harfbuzz ....... Do not compile HarfBuzz-NG support.
-    -qt-harfbuzz ....... (experimental) Use HarfBuzz-NG bundled with Qt
-                         to do text shaping. It can still be disabled
-                         by setting QT_HARFBUZZ environment variable to "old".
-    -system-harfbuzz ... (experimental) Use HarfBuzz-NG from the operating system
-                         to do text shaping. It can still be disabled
-                         by setting QT_HARFBUZZ environment variable to "old".
-
-    -no-openssl ........ Do not compile support for OpenSSL.
- +  -openssl ........... Enable run-time OpenSSL support.
-    -openssl-linked .... Enabled linked OpenSSL support.
-
-    -qt-pcre ........... Use the PCRE library bundled with Qt.
- +  -system-pcre ....... Use the PCRE library from the operating system.
-
-    -qt-xcb ............ Use xcb- libraries bundled with Qt.
-                         (libxcb.so will still be used from operating system).
- +  -system-xcb ........ Use xcb- libraries from the operating system.
-
-    -qt-xkbcommon ...... Use the xkbcommon library bundled with Qt.
- +  -system-xkbcommon .. Use the xkbcommon library from the operating system.
-
-Additional options:
-
-    -make <part> ....... Add part to the list of parts to be built at make time.
-                         (defaults to: $QT_DEFAULT_BUILD_PARTS)
-    -nomake <part> ..... Exclude part from the list of parts to be built.
-
-    -skip <module> ..... Exclude an entire module from the build.
-
-    -no-compile-examples ... Install only the sources of examples.
-
-    -no-gui ............ Don't build the Qt GUI module and dependencies.
- +  -gui ............... Build the Qt GUI module and dependencies.
-
-    -no-widgets ........ Don't build the Qt Widgets module and dependencies.
- +  -widgets ........... Build the Qt Widgets module and dependencies.
-
-    -R <string> ........ Add an explicit runtime library path to the Qt
-                         libraries.
-    -l <string> ........ Add an explicit library.
-
-    -no-rpath .......... Do not use the library install path as a runtime
-                         library path.
- +  -rpath ............. Link Qt libraries and executables using the library
-                         install path as a runtime library path. Equivalent
-                         to -R install_libpath
-
-    -continue .......... Continue as far as possible if an error occurs.
-
-    -verbose, -v ....... Print verbose information about each step of the
-                         configure process.
-
-    -silent ............ Reduce the build output so that warnings and errors
-                         can be seen more easily.
-
- *  -no-optimized-qmake ... Do not build qmake optimized.
-    -optimized-qmake ...... Build qmake optimized.
-
-    -no-nis ............ Do not compile NIS support.
- *  -nis ............... Compile NIS support.
-
-    -no-cups ........... Do not compile CUPS support.
- *  -cups .............. Compile CUPS support.
-                         Requires cups/cups.h and libcups.so.2.
-
-    -no-iconv .......... Do not compile support for iconv(3).
- *  -iconv ............. Compile support for iconv(3).
-
-    -no-icu ............ Do not compile support for ICU libraries.
- +  -icu ............... Compile support for ICU libraries.
-
-    -no-fontconfig ..... Do not compile FontConfig support.
- +  -fontconfig ........ Compile FontConfig support.
-
-    -no-strip .......... Do not strip binaries and libraries of unneeded symbols.
- *  -strip ............. Strip binaries and libraries of unneeded symbols when installing.
-
- *  -no-pch ............ Do not use precompiled header support.
-    -pch ............... Use precompiled header support.
-
-    -no-dbus ........... Do not compile the Qt D-Bus module.
- +  -dbus .............. Compile the Qt D-Bus module and dynamically load libdbus-1.
-    -dbus-linked ....... Compile the Qt D-Bus module and link to libdbus-1.
-
-    -reduce-relocations ..... Reduce relocations in the libraries through extra
-                              linker optimizations (Qt/X11 and Qt for Embedded Linux only;
-                              experimental; needs GNU ld >= 2.18).
-
-    -force-asserts ........ Force Q_ASSERT to be enabled even in release builds.
-
-    -device <name> ............... Cross-compile for device <name> (experimental)
-    -device-option <key=value> ... Add device specific options for the device mkspec
-                                   (experimental)
-
-    -no-separate-debug-info . Do not store debug information in a separate file.
- *  -separate-debug-info .... Strip debug information into a separate file.
-
-    -no-xcb ............ Do not compile Xcb (X protocol C-language Binding) support.
- *  -xcb ............... Compile Xcb support.
-
-    -no-eglfs .......... Do not compile EGLFS (EGL Full Screen/Single Surface) support.
- *  -eglfs ............. Compile EGLFS support (Requires OpenGL ES 2 support).
-
-    -no-directfb ....... Do not compile DirectFB support.
- *  -directfb .......... Compile DirectFB support.
-
-    -no-linuxfb ........ Do not compile Linux Framebuffer support.
- *  -linuxfb ........... Compile Linux Framebuffer support.
-
-    -no-kms ............ Do not compile KMS support.
- *  -kms ............... Compile KMS support (Requires EGL and OpenGL ES 2 support).
-
-    -qpa <name> ......... Sets the default QPA platform (e.g xcb, cocoa, windows).
-
-    -xplatform target ... The target platform when cross-compiling.
-
-    -sysroot <dir> ...... Sets <dir> as the target compiler's and qmake's sysroot and also sets pkg-config paths.
-    -no-gcc-sysroot ..... When using -sysroot, it disables the passing of --sysroot to the compiler
-
-    -no-feature-<feature> Do not compile in <feature>.
-    -feature-<feature> .. Compile in <feature>. The available features
-                          are described in src/corelib/global/qfeatures.txt
-
-    -qconfig local ...... Use src/corelib/global/qconfig-local.h rather than the
-                          default ($CFG_QCONFIG).
-
-    -qreal [double|float] typedef qreal to the specified type. The default is double.
-                          Note that changing this flag affects binary compatibility.
-
-    -no-opengl .......... Do not support OpenGL.
-    -opengl <api> ....... Enable OpenGL support
-                          With no parameter, this will attempt to auto-detect
-                          OpenGL ES 2, or regular desktop OpenGL.
-                          Use es2 for <api> to override auto-detection.
-
- *  -no-system-proxies .. Do not use system network proxies by default.
-    -system-proxies ..... Use system network proxies by default.
-
-    -no-warnings-are-errors Make warnings be treated normally
-    -warnings-are-errors  Make warnings be treated as errors
-                          (enabled if -developer-build is active)
-
-    -no-glib ........... Do not compile Glib support.
- +  -glib .............. Compile Glib support.
-EOF
-
-if [ "$XPLATFORM_MAEMO" = "yes" ]; then
-    cat << EOF
-
-    -no-xinput2 ........ Do not compile XInput2 support.
- *  -xinput2 ........... Compile XInput2 support.
-
-EOF
-
-fi
-
-if [ "$XPLATFORM_QNX" = "yes" ]; then
-    cat << EOF
-
-    -no-slog2 .......... Do not compile with slog2 support.
-    -slog2 ............. Compile with slog2 support.
-
-EOF
-
-fi
-
-if [ "$BUILD_ON_MAC" = "yes" ]; then
-    cat << EOF
-
-Qt/Mac only:
-
-    -Fstring ........... Add an explicit framework path.
-    -fw string ......... Add an explicit framework.
-
- *  -framework ......... Build Qt as a series of frameworks and
-                         link tools against those frameworks.
-    -no-framework ...... Do not build Qt as a series of frameworks.
-
-    -sdk <sdk> ......... Build Qt using Apple provided SDK <sdk>. The argument should be
-                         one of the available SDKs as listed by 'xcodebuild -showsdks'.
-                         Note that the argument applies only to Qt libraries and applications built
-                         using the target mkspec - not host tools such as qmake, moc, rcc, etc.
-
-EOF
-fi
-
-if [ "$XPLATFORM_ANDROID" = "yes" ]; then
-    cat << EOF
-
-Android options:
-    -android-sdk path .............. The Android SDK root path.
-                                     (default \$ANDROID_SDK_ROOT)
-
-    -android-ndk path .............. The Android NDK root path.
-                                     (default \$ANDROID_NDK_ROOT)
-
-    -android-ndk-platform .......... Sets the android platform
-                                     (default $CFG_DEFAULT_ANDROID_PLATFORM)
-
-    -android-ndk-host .............. Sets the android NDK host (linux-x86, linux-x86_64, etc.)
-                                     (default \$ANDROID_NDK_HOST)
-
-    -android-arch .................. Sets the android architecture (armeabi, armeabi-v7a, x86, mips)
-                                     (default $CFG_DEFAULT_ANDROID_TARGET_ARCH)
-
-    -android-toolchain-version ..... Sets the android toolchain version
-                                     (default $CFG_DEFAULT_ANDROID_NDK_TOOLCHAIN_VERSION)
-EOF
-
-fi
-
-   exit 0
-fi # Help
-
-
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 # LICENSING, INTERACTIVE PART
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