交叉编译Qt5.9.6

准备

主机平台：Ubuntu 16.04 LTS(x64)
    目标平台：ARM40-A5D3
    Qt版本：Qt5.9.6
    tslib github
    sqlite3
    ARM-GCC编译工具链：gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi

1、下载Qt5.9.6源代码

在Qt官网上下载Qt5.9.6源代码qt-everywhere-opensource-src-5.9.6.tar.xz

qt5src.jpg
2、编辑qmake.conf

解压源代码包，并编辑qmake.conf文件。
默认ARM GCC环境已经搭建完毕，参考ARM40-A5 GCC交叉编译环境搭建；
tslib，sqlite3也都已经预编译完毕，参考移植TSLIB到ARM40-A5和移植SQLite3到ARM40-A5。

$ cd ~
$ xz -d qt-everywhere-opensource-src-5.9.6.tar.xz #解压文件
$ tar xvf qt-everywhere-opensource-src-5.9.6.tar
$ cd qt-everywhere-opensource-src-5.9.6/
$ vim ./qtbase/mkspecs/linux-arm-gnueabi-g++/qmake.conf #编辑qmake.conf

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qmake.conf文件内容：

#
# qmake configuration for building with arm-linux-gnueabi-g++
#

MAKEFILE_GENERATOR = UNIX
CONFIG += incremental
QMAKE_INCREMENTAL_STYLE = sublib

QT_QPA_DEFAULT_PLATFORM = linuxfb #指定Qt显示驱动方式
QMAKE_CFLAGS_RELEASE += -O2 -march=armv7-a #指定处理器架构
QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv7-a

include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)

QMAKE_INCDIR += /opt/tslib/include /opt/sqlite3/include #指定头文件，需预编译
QMAKE_LIBDIR += /opt/tslib/lib /opt/sqlite3/lib #指定库文件，需预编译

# modifications to g++.conf
QMAKE_CC                = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -lts
QMAKE_CXX               = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -lts
QMAKE_LINK              = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -lts
QMAKE_LINK_SHLIB        = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -lts

# modifications to linux.conf
QMAKE_AR                = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-ar cqs
QMAKE_OBJCOPY           = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-objcopy
QMAKE_NM                = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-nm -P
QMAKE_STRIP             = /opt/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-strip

load(qt_config)
~

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3、configure编译配置

Qt5.9.6 configure编译选项详细见于附录中，在这里不再一一介绍。
配置文件不报错，就可以make了。

$ cd qt-everywhere-opensource-src-5.9.6/
$ sudo ./configure \
    -prefix /opt/qte5.9.6 \
    -confirm-license \
    -opensource \
    -shared \
    -release \
    -make libs \
    -xplatform linux-arm-gnueabi-g++ \
    -optimized-qmake \
    -pch \
    -linuxfb \
    -qt-libjpeg \
    -qt-libpng \
    -sqlite \
    -qt-zlib \
    -no-opengl \
    -no-sse2 \
    -no-openssl \
    -no-cups \
    -no-glib \
    -no-dbus \
    -no-xcb \
    -no-separate-debug-info \
    -make examples -nomake tools -nomake tests -no-iconv \
    -tslib \
    -I/opt/tslib/include \
    -L/opt/tslib/lib \
    -recheck-all

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4、编译安装Qt

$ sudo mkdir /opt/qte5.9.6   #在主机/opt目录下创建qte5.9.6目录
$ make -j 4                  #-j 4 表示4个线程同时编译，减少编译时间
$ sudo make install          #安装Qt
$ cd /opt/qte5.9.6/bin
$ ./qmake -v                 #查看Qt,编译成功
>>>
QMake version 3.1
Using Qt version 5.9.6 in /opt/qte5.9.6/lib
<<<

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5、解决错误

1、ERROR: Feature 'tslib' was enabled, but the pre-condition 'libs.tslib' failed.
ERROR: Feature 'system-sqlite' was enabled, but the pre-condition 'libs.sqlite3' failed.

解决：tslib和sqlite3要预先编译并指定路径或者配置末尾加上-recheck-all选项。

2、大多数的报错都是编译器路径有问题导致的，检查qmake.conf文件。

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至此，Qt5.9.6交叉编译完成，经过试验发现Qt5在Atmel-A5D3平台上显示异常，RGB三色中R和B颠倒了。
这是Qt5的BUG，正在修复当中，具体时间未知。
附录

>>>>
Configure understands variable assignments like VAR=value on the command line.
Each uppercased library name (obtainable with -list-libraries) supports the
suffixes _INCDIR, _LIBDIR, _PREFIX (INCDIR=PREFIX/include, LIBDIR=PREFIX/lib),
_LIBS, and - on Windows and Darwin - _LIBS_DEBUG and _LIBS_RELEASE. E.g.,
ICU_PREFIX=/opt/icu42 ICU_LIBS="-licui18n -licuuc -licudata".

It is also possible to manipulate any QMAKE_* variable, to amend the values
from the mkspec for the build of Qt itself, e.g., QMAKE_CXXFLAGS+=-g3.

Note that the *_LIBS* and QMAKE_* assignments manipulate lists, so items
containing meta characters (spaces in particular) need to be quoted according
to qmake rules. On top of that, the assignments as a whole need to be quoted
according to shell rules. It is recommended to use single quotes for the inner
quoting and double quotes for the outer quoting.

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Top-level installation directories:
-prefix <dir> ...... The deployment directory, as seen on the target device.
                       [/usr/local/Qt-$QT_VERSION, $PWD if -developer-build]
-extprefix <dir> ... The installation directory, as seen on the host machine.
                       [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. [EXTPREFIX]
-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.

Fine tuning of installation directory layout. Note that all directories
except -sysconfdir should be located under -prefix/-hostprefix:

-bindir <dir> ......... Executables [PREFIX/bin]
-headerdir <dir> ...... Header files [PREFIX/include]
-libdir <dir> ......... Libraries [PREFIX/lib]
-archdatadir <dir> .... Arch-dependent data [PREFIX]
-plugindir <dir> ...... Plugins [ARCHDATADIR/plugins]
-libexecdir <dir> ..... Helper programs [ARCHDATADIR/bin on Windows,
ARCHDATADIR/libexec otherwise]
-importdir <dir> ...... QML1 imports [ARCHDATADIR/imports]
-qmldir <dir> ......... QML2 imports [ARCHDATADIR/qml]
-datadir <dir> ........ Arch-independent data [PREFIX]
-docdir <dir> ......... Documentation [DATADIR/doc]
-translationdir <dir> . Translations [DATADIR/translations]
-sysconfdir <dir> ..... Settings used by Qt programs [PREFIX/etc/xdg]
-examplesdir <dir> .... Examples [PREFIX/examples]
-testsdir <dir> ....... Tests [PREFIX/tests]

-hostbindir <dir> ..... Host executables [HOSTPREFIX/bin]
-hostlibdir <dir> ..... Host libraries [HOSTPREFIX/lib]
-hostdatadir <dir> .... Data used by qmake [HOSTPREFIX]

Conventions for the remaining options: When an option's description is
followed by a list of values in brackets, the interpretation is as follows:
'yes' represents the bare option; all other values are possible prefixes to
the option, e.g., -no-gui. Alternatively, the value can be assigned, e.g.,
--gui=yes. Values are listed in the order they are tried if not specified;
'auto' is a shorthand for 'yes/no'. Solitary 'yes' and 'no' represent binary
options without auto-detection.

Configure meta:

-help, -h ............ Display this help screen
-verbose, -v ......... Print verbose messages during configuration
-continue ............ Continue configure despite errors
-redo ................ Re-configure with previously used options.
                         Additional options may be passed, but will not be
                         saved for later use by -redo.
-recheck [test,...] .. Discard cached negative configure test results.
                         Use this after installing missing dependencies.
                         Alternatively, if tests are specified, only their
                         results are discarded.
-recheck-all ......... Discard all cached configure test results.

-feature-<feature> ... Enable <feature>
-no-feature-<feature> Disable <feature> [none]
-list-features ....... List available features. Note that some features
have dedicated command line options as well.

-list-libraries ...... List possible external dependencies.

Build options:

-opensource .......... Build the Open-Source Edition of Qt
-commercial .......... Build the Commercial Edition of Qt
-confirm-license ..... Automatically acknowledge the license

-release ............. Build Qt with debugging turned off [yes]
-debug ............... Build Qt with debugging turned on [no]
-debug-and-release ... Build two versions of Qt, with and without
                         debugging turned on [yes] (Apple and Windows only)
-optimize-debug ...... Enable debug-friendly optimizations in debug builds
                         [auto] (Not supported with MSVC or Clang toolchains)
-optimize-size ....... Optimize release builds for size instead of speed [no]
-optimized-tools ..... Build optimized host tools even in debug build [no]
-force-debug-info .... Create symbol files for release builds [no]
-separate-debug-info . Split off debug information to separate files [no]
-strip ............... Strip release binaries of unneeded symbols [yes]
-force-asserts ....... Enable Q_ASSERT even in release builds [no]
-developer-build ..... Compile and link Qt for developing Qt itself
                         (exports for auto-tests, extra checks, etc.) [no]

-shared .............. Build shared Qt libraries [yes] (no for UIKit)
-static .............. Build static Qt libraries [no] (yes for UIKit)
-framework ........... Build Qt framework bundles [yes] (Apple only)

-platform <target> ... Select host mkspec [detected]
-xplatform <target> .. Select target mkspec when cross-compiling [PLATFORM]
-device <name> ....... Cross-compile for device <name>
-device-option <key=value> ... Add option for the device mkspec

-appstore-compliant .. Disable code that is not allowed in platform app stores.
                         This is on by default for platforms which require distribution
                         through an app store by default, in particular Android,
                         iOS, tvOS, watchOS, and Universal Windows Platform. [auto]

-qtnamespace <name> .. Wrap all Qt library code in 'namespace <name> {...}'.
-qtlibinfix <infix> .. Rename all libQt5*.so to libQt5*<infix>.so.

-testcocoon .......... Instrument with the TestCocoon code coverage tool [no]
-gcov ................ Instrument with the GCov code coverage tool [no]
-sanitize {address|thread|memory|undefined}
                         Instrument with the specified compiler sanitizer.
                         Note that some sanitizers cannot be combined;
                         for example, -sanitize address cannot be combined with
                         -sanitize thread.

-c++std <edition> .... Select C++ standard <edition> [c++1z/c++14/c++11]
(Not supported with MSVC)

-sse2 ................ Use SSE2 instructions [auto]
-sse3/-ssse3/-sse4.1/-sse4.2/-avx/-avx2/-avx512
Enable use of particular x86 instructions [auto]
Enabled ones are still subject to runtime detection.
-mips_dsp/-mips_dspr2 Use MIPS DSP/rev2 instructions [auto]

-qreal <type> ........ typedef qreal to the specified type. [double]
Note: this affects binary compatibility.

-R <string> .......... Add an explicit runtime library path to the Qt
                         libraries. Supports paths relative to LIBDIR.
-rpath ............... Link Qt libraries and executables using the library
                         install path as a runtime library path. Similar to
                         -R LIBDIR. On Apple platforms, disabling this implies
                         using absolute install names (based in LIBDIR) for
                         dynamic libraries and frameworks. [auto]

-reduce-exports ...... Reduce amount of exported symbols [auto]
-reduce-relocations .. Reduce amount of relocations [auto] (Unix only)

-plugin-manifests .... Embed manifests into plugins [no] (Windows only)
-static-runtime ...... With -static, use static runtime [no] (Windows only)

-pch ................. Use precompiled headers [auto]
-ltcg ................ Use Link Time Code Generation [no]
-use-gold-linker ..... Use the GNU gold linker [auto]
-incredibuild-xge .... Use the IncrediBuild XGE [no] (Windows only)
-ccache .............. Use the ccache compiler cache [no] (Unix only)
-make-tool <tool> .... Use <tool> to build qmake [nmake] (Windows only)
-mp .................. Use multiple processors for compilation (MSVC only)

-warnings-are-errors . Treat warnings as errors [no; yes if -developer-build]
-silent .............. Reduce the build output so that warnings and errors
can be seen more easily

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Build environment:

-sysroot <dir> ....... Set <dir> as the target sysroot
-gcc-sysroot ......... With -sysroot, pass --sysroot to the compiler [yes]

-pkg-config .......... Use pkg-config [auto] (Unix only)

-D <string> .......... Pass additional preprocessor define
-I <string> .......... Pass additional include path
-L <string> .......... Pass additional library path
-F <string> .......... Pass additional framework path (Apple only)

-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-sdk path .... Set Android SDK root path [$ANDROID_SDK_ROOT]
-android-ndk path .... Set Android NDK root path [$ANDROID_NDK_ROOT]
-android-ndk-platform Set Android platform
-android-ndk-host .... Set Android NDK host (linux-x86, linux-x86_64, etc.)
                         [$ANDROID_NDK_HOST]
-android-arch ........ Set Android architecture (armeabi, armeabi-v7a,
                         arm64-v8a, x86, x86_64, mips, mips64)
-android-toolchain-version ... Set Android toolchain version
-android-style-assets Automatically extract style assets from the device at
                         run time. This option makes the Android style behave
                         correctly, but also makes the Android platform plugin
                         incompatible with the LGPL2.1. [yes]

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Component selection:

-skip <repo> ......... Exclude an entire repository from the build.
-make <part> ......... Add <part> to the list of parts to be built.
                         Specifying this option clears the default list first.
                         [libs and examples, also tools if not cross-building,
                         also tests if -developer-build]
-nomake <part> ....... Exclude <part> from the list of parts to be built.
-compile-examples .... When unset, install only the sources of examples [yes]
-gui ................. Build the Qt GUI module and dependencies [yes]
-widgets ............. Build the Qt Widgets module and dependencies [yes]
-no-dbus ............. Do not build the Qt D-Bus module
                         [default on Android and Windows]
-dbus-linked ......... Build Qt D-Bus and link to libdbus-1 [auto]
-dbus-runtime ........ Build Qt D-Bus and dynamically load libdbus-1 [no]
-accessibility ....... Enable accessibility support [yes]
                         Note: Disabling accessibility is not recommended.
-qml-debug ........... Enable QML debugging support [yes]

Qt comes with bundled copies of some 3rd party libraries. These are used
by default if auto-detection of the respective system library fails.

Core options:

-doubleconversion .... Select used double conversion library [system/qt/no]
No implies use of sscanf_l and snprintf_l (imprecise).
-glib ................ Enable Glib support [no; auto on Unix]
-eventfd ............. Enable eventfd support
-inotify ............. Enable inotify support
-iconv ............... Enable iconv(3) support [posix/sun/gnu/no] (Unix only)
-icu ................. Enable ICU support [auto]
-pcre ................ Select used libpcre2 [system/qt]
-pps ................. Enable PPS support [auto] (QNX only)
-zlib ................ Select used zlib [system/qt]

Logging backends:
    -journald .......... Enable journald support [no] (Unix only)
    -syslog ............ Enable syslog support [no] (Unix only)
    -slog2 ............. Enable slog2 support [auto] (QNX only)

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Network options:

-ssl ................. Enable either SSL support method [auto]
-no-openssl .......... Do not use OpenSSL [default on Apple and WinRT]
-openssl-linked ...... Use OpenSSL and link to libssl [no]
-openssl-runtime ..... Use OpenSSL and dynamically load libssl [auto]
-securetransport ..... Use SecureTransport [auto] (Apple only)

-sctp ................ Enable SCTP support [no]

-libproxy ............ Enable use of libproxy [no]
-system-proxies ...... Use system network proxies by default [yes]

Gui, printing, widget options:

-cups ................ Enable CUPS support [auto] (Unix only)

-fontconfig .......... Enable Fontconfig support [auto] (Unix only)
-freetype ............ Select used FreeType [system/qt/no]
-harfbuzz ............ Select used HarfBuzz-NG [system/qt/no]
(Not auto-detected on Apple and Windows)

-gtk ................. Enable GTK platform theme support [auto]

-lgmon ............... Enable lgmon support [auto] (QNX only)

-no-opengl ........... Disable OpenGL support
-opengl <api> ........ Enable OpenGL support. Supported APIs:
                         es2 (default on Windows), desktop (default on Unix),
                         dynamic (Windows only)
-opengles3 ........... Enable OpenGL ES 3.x support instead of ES 2.x [auto]
-angle ............... Use bundled ANGLE to support OpenGL ES 2.0 [auto]
                         (Windows only)
-combined-angle-lib .. Merge LibEGL and LibGLESv2 into LibANGLE (Windows only)

-qpa <name> .......... Select default QPA backend (e.g., xcb, cocoa, windows)
-xcb-xlib............. Enable Xcb-Xlib support [auto]

Platform backends:
    -direct2d .......... Enable Direct2D support [auto] (Windows only)
    -directfb .......... Enable DirectFB support [no] (Unix only)
    -eglfs ............. Enable EGLFS support [auto; no on Android and Windows]
    -gbm ............... Enable backends for GBM [auto] (Linux only)
    -kms ............... Enable backends for KMS [auto] (Linux only)
    -linuxfb ........... Enable Linux Framebuffer support [auto] (Linux only)
    -mirclient ......... Enable Mir client support [no] (Linux only)
    -xcb ............... Select used xcb-* libraries [system/qt/no]
                         (-qt-xcb still uses system version of libxcb itself)

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Input backends:
    -evdev ............. Enable evdev support [auto]
    -imf ............... Enable IMF support [auto] (QNX only)
    -libinput .......... Enable libinput support [auto]
    -mtdev ............. Enable mtdev support [auto]
    -tslib ............. Enable tslib support [auto]
    -xinput2 ........... Enable XInput2 support [auto]
    -xkbcommon-x11 ..... Select xkbcommon used in combination with xcb
                         [system/qt/no]
    -xkb-config-root <dir> ... With -qt-xkbcommon-x11, set default XKB config
                               root <dir> [detect]
    -xkbcommon-evdev ... Enable X-less xkbcommon in combination with libinput
                         [auto]

Image formats:
    -gif ............... Enable reading support for GIF [auto]
    -ico ............... Enable support for ICO [yes]
    -libpng ............ Select used libpng [system/qt/no]
    -libjpeg ........... Select used libjpeg [system/qt/no]

Database options:

-sql-<driver> ........ Enable SQL <driver> plugin. Supported drivers:
db2 ibase mysql oci odbc psql sqlite2 sqlite tds
[all auto]
-sqlite .............. Select used sqlite3 [system/qt]

Qt3D options:

-assimp .............. Select used assimp library [system/qt/no]
-qt3d-profile-jobs ... Enable jobs profiling [no]
-qt3d-profile-gl ..... Enable OpenGL profiling [no]

Multimedia options:

-pulseaudio .......... Enable PulseAudio support [auto] (Unix only)
-alsa ................ Enable ALSA support [auto] (Unix only)
-no-gstreamer ........ Disable support for GStreamer
-gstreamer [version] . Enable GStreamer support [auto]
With no parameter, 1.0 is tried first, then 0.10.
-mediaplayer-backend <name> ... Select media player backend (Windows only)
Supported backends: directshow (default), wmf

Webengine options:

-alsa ................ Enable ALSA support [auto] (Linux only)
-webengine-icu ....... Select used ICU libraries [system/qt] (Linux only)
-ffmpeg .............. Select used FFmpeg libraries [system/qt] (Linux only)
-opus ................ Select used Opus libraries [system/qt] (Linux only)
-webp ................ Select used WebP libraries [system/qt] (Linux only)
-pepper-plugins ...... Enable use of Pepper Flash and Widevine plugins [auto]
-printing-and-pdf .... Enable use of printing and output to PDF [auto]
-proprietary-codecs .. Enable support for proprietary codecs [no]
-pulseaudio .......... Enable PulseAudio support [auto] (Linux only)
-spellchecker ........ Enable support for spellchecker [yes]
-webrtc .............. Enable support for WebRTC [auto]
————————————————
版权声明：本文为CSDN博主「jzzy_hony」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/jzzy_hony/article/details/80883473

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