Move the help text for configure into its own file

Change-Id: If9c86c5bf9c6194f1ac282a657f9967f4fa589b3
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

2 files changed, 436 insertions, 441 deletions

diff --git a/config_help.txt b/config_help.txt
new file mode 100644
index 0000000000..971e932657
--- /dev/null
+++ b/config_help.txt
@@ -0,0 +1,433 @@
+Usage:  configure [options]
+
+Installation options:
+
+ These are optional, but you may specify install directories.
+
+    -prefix <dir> ...... The deployment directory, as seen on the target device.
+                         (default /usr/local/Qt-$QT_VERSION, $PWD if -developer-build is active)
+
+    -extprefix <dir> ... The installation directory, as seen on the host machine.
+                         (default SYSROOT/PREFIX)
+
+    -hostprefix [dir] .. The installation directory for build tools running on the
+                         host machine. If [dir] is not given, the current build
+                         directory will be used. (default EXTPREFIX)
+
+ You may use these to change the layout of the install. Note that all directories
+ except -sysconfdir should be located under -prefix/-hostprefix:
+
+    -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 (Apple platforms only).
+
+    -force-debug-info .... Create symbol files for release builds.
+
+    -developer-build ..... Compile and link Qt with Qt developer options (including auto-tests exporting)
+
+ *  -no-optimized-tools .. Do not build optimized host tools even in debug build.
+    -optimized-tools ..... Build optimized host tools even in debug build.
+
+    -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)
+
+    -c++std <edition> .... Compile Qt with C++ standard edition (c++11, c++14, c++1z)
+                           Default: highest supported
+
+ *  -shared .............. Create and use shared Qt libraries.
+    -static .............. Create and use static Qt libraries.
+
+    -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>.
+    -sql-<driver>          Enable SQL <driver> plugin.
+
+                           Possible values for <driver>:
+                           [db2, ibase, mysql, oci, odbc, psql, sqlite, sqlite2, tds]
+
+    -system-sqlite ....... Use sqlite from the operating system.
+
+    -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-avx512 ........... Do not compile with use of AVX512 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-mtdev ............ Do not compile mtdev support.
+ +  -mtdev ............... Enable mtdev support.
+
+ +  -no-journald ......... Do not send logging output to journald.
+    -journald ............ Send logging output to journald.
+
+ +  -no-syslog ........... Do not send logging output to syslog.
+    -syslog .............. Send logging output to syslog.
+
+    -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-doubleconversion ..... Use sscanf_l and snprintf_l for (imprecise) double conversion.
+    -qt-doubleconversion ..... Use the libdouble-conversion bundled with Qt.
+ +  -system-doubleconversion . Use the libdouble-conversion provided by the system.
+                               See https://github.com/google/double-conversion
+
+    -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 ......... Use HarfBuzz-NG bundled with Qt to do text shaping.
+                           It can still be disabled by setting
+                           the QT_HARFBUZZ environment variable to "old".
+ +  -system-harfbuzz ..... Use HarfBuzz-NG from the operating system
+                           to do text shaping. It can still be disabled
+                           by setting the QT_HARFBUZZ environment variable to "old".
+                           See http://www.harfbuzz.org
+
+    -no-openssl .......... Do not compile support for OpenSSL.
+ +  -openssl ............. Enable run-time OpenSSL support.
+    -openssl-linked ...... Enabled linked OpenSSL support.
+
+    -no-libproxy ......... Do not compile support for libproxy
+ +  -libproxy ............ Use libproxy from the operating system.
+
+    -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.
+
+    -xkb-config-root ..... Set default XKB config root. This option is used only together with -qt-xkbcommon-x11.
+    -qt-xkbcommon-x11 .... Use the xkbcommon library bundled with Qt in combination with xcb.
+ +  -system-xkbcommon-x11  Use the xkbcommon library from the operating system in combination with xcb.
+
+    -no-xkbcommon-evdev .. Do not use X-less xkbcommon when compiling libinput support.
+ *  -xkbcommon-evdev ..... Use X-less xkbcommon when compiling libinput support.
+
+    -no-xinput2 .......... Do not compile XInput2 support.
+ *  -xinput2 ............. Compile XInput2 support.
+
+    -no-xcb-xlib.......... Do not compile Xcb-Xlib support.
+ *  -xcb-xlib............. Compile Xcb-Xlib support.
+
+    -no-glib ............. Do not compile Glib support.
+ +  -glib ................ Compile Glib support.
+
+    -no-pulseaudio ....... Do not compile PulseAudio support.
+ +  -pulseaudio .......... Compile PulseAudio support.
+
+    -no-alsa ............. Do not compile ALSA support.
+ +  -alsa ................ Compile ALSA support.
+
+    -no-gtk .............. Do not compile GTK platform theme support.
+ +  -gtk ................. Compile GTK platform theme support.
+
+Additional options:
+
+    -make <part> ......... Add part to the list of parts to be built at make time.
+                           (defaults to: libs tools examples)
+    -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. On Apple platforms, this implies using
+                           absolute install names (based in -libdir) for dynamic
+                           libraries and frameworks.
+ +  -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-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-evdev ............ Do not compile support for evdev.
+ *  -evdev ............... Compile support for evdev.
+
+    -no-tslib ............ Do not compile support for tslib.
+ *  -tslib ............... Compile support for tslib.
+
+    -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-ltcg               Do not use Link Time Code Generation
+    -ltcg                  Use Link Time Code Generation.
+
+    -no-dbus ............. Do not compile the Qt D-Bus module.
+ +  -dbus-linked ......... Compile the Qt D-Bus module and link to libdbus-1.
+    -dbus-runtime ........ Compile the Qt D-Bus module and dynamically load 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).
+
+    -no-use-gold-linker .. Do not link using the GNU gold linker.
+ +  -use-gold-linker ..... Link using the GNU gold linker if available.
+
+    -force-asserts ....... Force Q_ASSERT to be enabled even in release builds.
+
+    -sanitize [address|thread|memory|undefined] Enables the specified compiler sanitizer.
+
+    -device <name> ............... Cross-compile for device <name> (experimental)
+    -device-option <key=value> ... Add device specific options for the device mkspec
+                                   (experimental)
+
+    -host-option <key=value> ..... Add host specific options for the host mkspec
+
+ *  -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.
+
+    -no-kms .............. Do not compile backends for KMS.
+ *  -kms ................. Compile backends for KMS.
+
+    -no-gbm .............. Do not compile backends for GBM.
+ *  -gbm ................. Compile backends for GBM.
+
+    -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-mirclient......... Do not compile Mir client support.
+    -mirclient............ Compile Mir client 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
+
+    -external-hostbindir <path> .. Path to Qt tools built for this machine. Use this when -platform
+                                   does not match the current system, i.e., to make a Canadian Cross Build.
+
+    -no-feature-<feature>  Do not compile in <feature>.
+    -feature-<feature> ... Compile in <feature>. The available features
+                           are described in src/corelib/global/qfeatures.txt
+
+    -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 2.0 and higher, or regular desktop OpenGL.
+                           Use es2 for <api> to override auto-detection.
+
+    -no-libinput ......... Do not support libinput.
+ *  -libinput ............ Enable libinput support.
+
+    -no-gstreamer ........ Do not support GStreamer.
+ +  -gstreamer <version> . Enable GStreamer support
+                           With no parameter, this will attempt to auto-detect GStreamer 0.10 and
+                           1.0. GStreamer 1.0 is used by default when available.
+                           Use 0.10 or 1.0 for <version> 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 options:
+
+    -no-slog2 ........... Do not compile with slog2 support.
+    -slog2 .............. Compile with slog2 support.
+
+    -no-pps ............. Do not compile with pps support.
+    -pps ................ Compile with pps support.
+
+    -no-imf ............. Do not compile with imf support.
+    -imf ................ Compile with imf support.
+
+    -no-lgmon ........... Do not compile with lgmon support.
+    -lgmon .............. Compile with lgmon support.
+
+Apple platform 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.
+
+ *  -securetransport .... Use SecureTransport instead of OpenSSL
+
+    -no-securetransport . Do not use SecureTransport, either use OpenSSL or do not use any SSL backend
+                          at all (if combined with -no-openssl).
+
+    -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
+
+    -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,
+                                     arm64-v8a, x86_64, mips64)
+
+    -android-toolchain-version ..... Sets the android toolchain version
+
+    -no-android-style-assets ....... Do not compile in the code which automatically extracts
+                                     style assets from the run-time device. Setting this will
+                                     make the Android style behave incorrectly, but will enable
+                                     compatibility with the LGPL2.1 license.
+ *  -android-style-assets .......... Compile the code which automatically extracts style assets
+                                     from the run-time device. This option will make the
+                                     Android platform plugin incompatible with the LGPL2.1.
diff --git a/configure b/configure
index 56f4a5b9b4..eac848d692 100755
--- a/configure
+++ b/configure
@@ -2170,447 +2170,9 @@ done
 #-------------------------------------------------------------------------------
 
 if [ "$OPT_HELP" = "yes" ]; then
-    cat <<EOF
-Usage:  $relconf [options]
-
-Installation options:
-
- These are optional, but you may specify install directories.
-
-    -prefix <dir> ...... The deployment directory, as seen on the target device.
-                         (default /usr/local/Qt-${QT_VERSION}, \$PWD if -developer-build is active)
-
-    -extprefix <dir> ... The installation directory, as seen on the host machine.
-                         (default SYSROOT/PREFIX)
-
-    -hostprefix [dir] .. The installation directory for build tools running on the
-                         host machine. If [dir] is not given, the current build
-                         directory will be used. (default EXTPREFIX)
-
- You may use these to change the layout of the install. Note that all directories
- except -sysconfdir should be located under -prefix/-hostprefix:
-
-    -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)
-
- *  -no-optimized-tools ... Do not build optimized host tools even in debug build.
-    -optimized-tools ...... Build optimized host tools even in debug build.
-
-    -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)
-
-    -c++std <edition> .. Compile Qt with C++ standard edition (c++11, c++14, c++1z)
-                         Default: highest supported
-
- *  -shared ............ Create and use shared Qt libraries.
-    -static ............ Create and use static Qt libraries.
-
-    -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>.
-    -sql-<driver>        Enable SQL <driver> plugin.
-
-                         Possible values for <driver>:
-                         [$CFG_SQL_AVAILABLE ]
-
-    -system-sqlite ..... Use sqlite from the operating system.
-
-    -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-avx512 ......... Do not compile with use of AVX512 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-mtdev ........... Do not compile mtdev support.
- +  -mtdev .............. Enable mtdev support.
-
- +  -no-journald ........ Do not send logging output to journald.
-    -journald ........... Send logging output to journald.
-
- +  -no-syslog .......... Do not send logging output to syslog.
-    -syslog ............. Send logging output to syslog.
-
-    -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-doubleconversion ..... Use sscanf_l and snprintf_l for (imprecise) double conversion.
-    -qt-doubleconversion ..... Use the libdouble-conversion bundled with Qt.
- +  -system-doubleconversion . Use the libdouble-conversion provided by the system.
-                               See https://github.com/google/double-conversion
-
-    -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 ........ Use HarfBuzz-NG bundled with Qt to do text shaping.
-                          It can still be disabled by setting
-                          the QT_HARFBUZZ environment variable to "old".
- +  -system-harfbuzz .... Use HarfBuzz-NG from the operating system
-                          to do text shaping. It can still be disabled
-                          by setting the QT_HARFBUZZ environment variable to "old".
-                          See http://www.harfbuzz.org
-
-    -no-openssl ......... Do not compile support for OpenSSL.
- +  -openssl ............ Enable run-time OpenSSL support.
-    -openssl-linked ..... Enabled linked OpenSSL support.
-
-    -no-libproxy ....... Do not compile support for libproxy
- +  -libproxy .......... Use libproxy from the operating system.
-
-    -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.
-
-    -xkb-config-root .... Set default XKB config root. This option is used only together with -qt-xkbcommon-x11.
-    -qt-xkbcommon-x11 ... Use the xkbcommon library bundled with Qt in combination with xcb.
- +  -system-xkbcommon-x11 Use the xkbcommon library from the operating system in combination with xcb.
-
-    -no-xkbcommon-evdev . Do not use X-less xkbcommon when compiling libinput support.
- *  -xkbcommon-evdev .... Use X-less xkbcommon when compiling libinput support.
-
-    -no-xinput2 ......... Do not compile XInput2 support.
- *  -xinput2 ............ Compile XInput2 support.
-
-    -no-xcb-xlib......... Do not compile Xcb-Xlib support.
- *  -xcb-xlib............ Compile Xcb-Xlib support.
-
-    -no-glib ............ Do not compile Glib support.
- +  -glib ............... Compile Glib support.
-
-    -no-pulseaudio ...... Do not compile PulseAudio support.
- +  -pulseaudio ......... Compile PulseAudio support.
-
-    -no-alsa ............ Do not compile ALSA support.
- +  -alsa ............... Compile ALSA support.
-
-    -no-gtk ............. Do not compile GTK platform theme support.
- +  -gtk ................ Compile GTK platform theme 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. On Apple platforms, this implies using
-                         absolute install names (based in -libdir) for dynamic
-                         libraries and frameworks.
- +  -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-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-evdev .......... Do not compile support for evdev.
- *  -evdev ............. Compile support for evdev.
-
-    -no-tslib .......... Do not compile support for tslib.
- *  -tslib ............. Compile support for tslib.
-
-    -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-ltcg             Do not use Link Time Code Generation
-    -ltcg                Use Link Time Code Generation.
-
-    -no-dbus ........... Do not compile the Qt D-Bus module.
- +  -dbus-linked ....... Compile the Qt D-Bus module and link to libdbus-1.
-    -dbus-runtime ...... Compile the Qt D-Bus module and dynamically load 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).
-
-    -no-use-gold-linker ..... Do not link using the GNU gold linker.
- +  -use-gold-linker ........ Link using the GNU gold linker if available.
-
-    -force-asserts ........ Force Q_ASSERT to be enabled even in release builds.
-
-    -sanitize [address|thread|memory|undefined] Enables the specified compiler sanitizer.
-
-    -device <name> ............... Cross-compile for device <name> (experimental)
-    -device-option <key=value> ... Add device specific options for the device mkspec
-                                   (experimental)
-
-    -host-option <key=value> ..... Add host specific options for the host mkspec
-
- *  -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.
-
-    -no-kms ............ Do not compile backends for KMS.
- *  -kms ............... Compile backends for KMS.
-
-    -no-gbm ............ Do not compile backends for GBM.
- *  -gbm ............... Compile backends for GBM.
-
-    -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-mirclient....... Do not compile Mir client support.
-    -mirclient.......... Compile Mir client 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
-
-    -external-hostbindir <path> .. Path to Qt tools built for this machine. Use this when -platform
-                                   does not match the current system, i.e., to make a Canadian Cross Build.
-
-    -no-feature-<feature> Do not compile in <feature>.
-    -feature-<feature> .. Compile in <feature>. The available features
-                          are described in src/corelib/global/qfeatures.txt
-
-    -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 2.0 and higher, or regular desktop OpenGL.
-                          Use es2 for <api> to override auto-detection.
-
-    -no-libinput ........ Do not support libinput.
- *  -libinput ........... Enable libinput support.
-
-    -no-gstreamer ....... Do not support GStreamer.
- +  -gstreamer <version>  Enable GStreamer support
-                          With no parameter, this will attempt to auto-detect GStreamer 0.10 and
-                          1.0. GStreamer 1.0 is used by default when available.
-                          Use 0.10 or 1.0 for <version> 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 options:
-
-    -no-slog2 .......... Do not compile with slog2 support.
-    -slog2 ............. Compile with slog2 support.
-
-    -no-pps ............ Do not compile with pps support.
-    -pps ............... Compile with pps support.
-
-    -no-imf ............ Do not compile with imf support.
-    -imf ............... Compile with imf support.
-
-    -no-lgmon .......... Do not compile with lgmon support.
-    -lgmon ............. Compile with lgmon 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.
-
- *  -securetransport ... Use SecureTransport instead of OpenSSL
-
-    -no-securetransport  Do not use SecureTransport, either use OpenSSL or do not use any SSL backend
-                         at all (if combined with -no-openssl).
-
-    -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,
-                                     arm64-v8a, x86_64, mips64)
-                                     (default $CFG_DEFAULT_ANDROID_TARGET_ARCH)
-
-    -android-toolchain-version ..... Sets the android toolchain version
-                                     (default $CFG_DEFAULT_ANDROID_NDK_TOOLCHAIN_VERSION)
-
-    -no-android-style-assets ....... Do not compile in the code which automatically extracts
-                                     style assets from the run-time device. Setting this will
-                                     make the Android style behave incorrectly, but will enable
-                                     compatibility with the LGPL2.1 license.
- *  -android-style-assets .......... Compile the code which automatically extracts style assets
-                                     from the run-time device. This option will make the
-                                     Android platform plugin incompatible with the LGPL2.1.
-EOF
-
-   exit 0
-fi # Help
+    cat $relpath/config_help.txt
+    exit 0
+fi
 
 #-------------------------------------------------------------------------------
 # platform detection