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  4. Undefined Reference to Neon Functions when building Qt6-base from source on Raspberry Pi Zero 2 w
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Undefined Reference to Neon Functions when building Qt6-base from source on Raspberry Pi Zero 2 w

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  • E Offline
    E Offline
    Evan_muhaha
    wrote on last edited by
    #1

    I am trying to build qtbase-everywhere-src-6.7.3 from source on my raspberry pi zero 2 w (without cross compilation) But cmake detected undefined reference to many neon-related functions. Since I want to take advantage of the neon capabilities of the pi, Can anyone help me fix this issue? Thanks!

    Here is a list of steps that I followed that leads to the error:

    First install dependencies

    apt install ninja-build libfontconfig1-dev libdbus-1-dev libfreetype6-dev libicu-dev libinput-dev libxkbcommon-dev libsqlite3-dev libssl-dev libpng-dev libjpeg-dev libglib2.0-dev libgles2-mesa-dev libgbm-dev libdrm-dev libx11-dev libxcb1-dev libxext-dev libxi-dev libxcomposite-dev libxcursor-dev libxtst-dev libxrandr-dev libx11-xcb-dev libxext-dev libxfixes-dev libxi-dev libxrender-dev libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0-dev libxcb-util0-dev libxcb-xinerama0-dev libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev libxcb-xinput-dev

    Download source

    wget https://download.qt.io/official_releases/qt/6.7/6.7.3/submodules/qtbase-everywhere-src-6.7.3.tar.xz

    Build

    tar xf qtbase-everywhere-src-6.7.3.tar.xz
mkdir qtbase-everywhere-src-6.7.3/build
cd qtbase-everywhere-src-6.7.3/build

cmake -G Ninja \                                                                   
-DCMAKE_INSTALL_PREFIX=/opt/Qt/6.7.3-armv8 \
-DCMAKE_BUILD_TYPE=Release \
-DQT_FEATURE_opengles2=ON \
-DQT_FEATURE_opengles3=OFF \
-DQT_FEATURE_kms=ON \
-DFEATURE_optimize_size=ON \
-DQT_AVOID_CMAKE_ARCHIVING_API=ON ..

cmake --build . --parallel 2

    After leave it to build for several hours, cmake errored out, here is the complete error message:

    ➜  build cmake --build . --parallel 2   
[13/518] Linking CXX shared library lib/libQt6Gui.so.6.7.3
FAILED: lib/libQt6Gui.so.6.7.3 
: && /usr/bin/c++ -fPIC -DNDEBUG -Os  -Wl,--no-undefined -Wl,--version-script,/home/pi/qtbase-everywhere-src-6.7.3/build/src/gui/Gui.version -Wl,--enable-new-dtags -shared -Wl,-soname,libQt6Gui.so.6 -o lib/libQt6Gui.so.6.7.3 src/gui/CMakeFiles/Gui.dir/Gui_autogen/mocs_compilation.cpp.o src/gui/CMakeFiles/Gui.dir/compat/removed_api.cpp.o src/gui/CMakeFiles/Gui.dir/image/qabstractfileiconengine.cpp.o src/gui/CMakeFiles/Gui.dir/image/qabstractfileiconprovider.cpp.o src/gui/CMakeFiles/Gui.dir/image/qbitmap.cpp.o src/gui/CMakeFiles/Gui.dir/image/qbmphandler.cpp.o src/gui/CMakeFiles/Gui.dir/image/qicon.cpp.o src/gui/CMakeFiles/Gui.dir/image/qiconengine.cpp.o src/gui/CMakeFiles/Gui.dir/image/qiconengineplugin.cpp.o src/gui/CMakeFiles/Gui.dir/image/qiconloader.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimage.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimage_conversions.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimageiohandler.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimagepixmapcleanuphooks.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimagereader.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimagereaderwriterhelpers.cpp.o src/gui/CMakeFiles/Gui.dir/image/qimagewriter.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpaintengine_pic.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpicture.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpixmap.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpixmap_blitter.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpixmap_raster.cpp.o src/gui/CMakeFiles/Gui.dir/image/qpixmapcache.cpp.o src/gui/CMakeFiles/Gui.dir/image/qplatformpixmap.cpp.o src/gui/CMakeFiles/Gui.dir/image/qppmhandler.cpp.o src/gui/CMakeFiles/Gui.dir/image/qxbmhandler.cpp.o src/gui/CMakeFiles/Gui.dir/image/qxpmhandler.cpp.o src/gui/CMakeFiles/Gui.dir/kernel/qclipboard.cpp.o src/gui/CMakeFiles/Gui.dir/kernel/qcursor.cpp.o src/gui/CMakeFiles/Gui.dir/kernel/qeventpoint.cpp.o src/gui/CMakeFiles/Gui.dir/kernel/qevent.cpp.o src/gui/CMakeFiles/Gui.dir/kernel/qgenericplugin.cpp.o 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src/gui/CMakeFiles/Gui.dir/platform/unix/dbustray/qstatusnotifieritemadaptor.cpp.o src/gui/CMakeFiles/Gui.dir/platform/unix/dbustray/qxdgnotificationproxy.cpp.o src/gui/CMakeFiles/Gui.dir/platform/unix/qxkbcommon.cpp.o src/gui/CMakeFiles/Gui.dir/platform/unix/qxkbcommon_3rdparty.cpp.o src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o src/gui/CMakeFiles/Gui.dir/util/qedidparser.cpp.o  -Wl,-rpath,/home/pi/qtbase-everywhere-src-6.7.3/build/lib:  /usr/lib/arm-linux-gnueabihf/libGLESv2.so  /usr/lib/arm-linux-gnueabihf/libEGL.so  /usr/lib/arm-linux-gnueabihf/libfontconfig.so  -ldl  /usr/lib/arm-linux-gnueabihf/libglib-2.0.so  lib/libQt6DBus.so.6.7.3  /usr/lib/arm-linux-gnueabihf/libxkbcommon.so  /usr/lib/arm-linux-gnueabihf/libEGL.so  /usr/lib/arm-linux-gnueabihf/libpng.so  lib/libQt6BundledHarfbuzz.a  /usr/lib/arm-linux-gnueabihf/libfreetype.so  /usr/lib/arm-linux-gnueabihf/libz.so  /usr/lib/arm-linux-gnueabihf/libgthread-2.0.so  lib/libQt6Core.so.6.7.3  -lpthread  -latomic && :
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qimage_conversions.cpp:(.text+0x3110): undefined reference to `storeRGB32FromARGB32PM_neon(unsigned char*, unsigned int const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/image/qimage_conversions.cpp.o: in function `convert_generic_inplace(QImageData*, QImage::Format, QFlags<Qt::ImageConversionFlag>)':
qimage_conversions.cpp:(.text+0x3744): undefined reference to `storeRGB32FromARGB32PM_neon(unsigned char*, unsigned int const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/image/qimage_conversions.cpp.o: in function `_GLOBAL__sub_I_qimage_conversions.cpp':
qimage_conversions.cpp:(.text.startup+0x67c): undefined reference to `convert_RGB888_to_RGB32_neon(QImageData*, QImageData const*, QFlags<Qt::ImageConversionFlag>)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o: in function `void qt_rectfill<unsigned int>(unsigned int*, unsigned int, int, int, int, int, int)':
qdrawhelper.cpp:(.text+0x1684): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text+0x169c): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o: in function `qt_fetch_linear_gradient(unsigned int*, Operator const*, QSpanData const*, int, int, int)':
qdrawhelper.cpp:(.text+0x17d0): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o: in function `void qt_bitmapblit_template<unsigned int>(QRasterBuffer*, int, int, unsigned int, unsigned char const*, int, int, int)':
qdrawhelper.cpp:(.text+0x19e4): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text+0x1a30): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o:qdrawhelper.cpp:(.text+0x1a78): more undefined references to `qt_memfill32(unsigned int*, unsigned int, int)' follow
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qdrawhelper.cpp.o: in function `_GLOBAL__sub_I_qdrawhelper.cpp':
qdrawhelper.cpp:(.text.startup+0x1e4): undefined reference to `comp_func_solid_SourceOver_neon(unsigned int*, int, unsigned int, unsigned int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x1e8): undefined reference to `storeRGBXFromARGB32PM_neon(unsigned char*, unsigned int const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x1ec): undefined reference to `qt_blend_rgb32_on_rgb32_neon(unsigned char*, int, unsigned char const*, int, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x1f0): undefined reference to `qt_blend_argb32_on_argb32_neon(unsigned char*, int, unsigned char const*, int, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x1f8): undefined reference to `qt_blend_argb32_on_argb32_scanline_neon(unsigned int*, unsigned int const*, int, unsigned int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x200): undefined reference to `comp_func_Plus_neon(unsigned int*, unsigned int const*, int, unsigned int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x204): undefined reference to `fetchARGB32ToARGB32PM_neon(unsigned int*, unsigned char const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x20c): undefined reference to `qt_fetch_radial_gradient_neon(unsigned int*, Operator const*, QSpanData const*, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x210): undefined reference to `qt_fetchUntransformed_888_neon(unsigned int*, Operator const*, QSpanData const*, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x218): undefined reference to `convertARGB32ToARGB32PM_neon(unsigned int*, int, QList<unsigned int> const*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x21c): undefined reference to `storeARGB32FromARGB32PM_neon(unsigned char*, unsigned int const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x220): undefined reference to `fetchARGB32ToRGBA64PM_neon(QRgba64*, unsigned char const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x224): undefined reference to `convertARGB32ToRGBA64PM_neon(QRgba64*, unsigned int const*, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x228): undefined reference to `fetchRGBA8888ToARGB32PM_neon(unsigned int*, unsigned char const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x22c): undefined reference to `convertRGBA8888ToARGB32PM_neon(unsigned int*, int, QList<unsigned int> const*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x230): undefined reference to `storeRGBA8888FromARGB32PM_neon(unsigned char*, unsigned int const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x234): undefined reference to `fetchRGBA8888ToRGBA64PM_neon(QRgba64*, unsigned char const*, int, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x238): undefined reference to `convertRGBA8888ToRGBA64PM_neon(QRgba64*, unsigned int const*, int, QList<unsigned int> const*, QDitherInfo*)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x23c): undefined reference to `qt_blend_argb32_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x240): undefined reference to `qt_blend_rgb16_on_argb32_neon(unsigned char*, int, unsigned char const*, int, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x244): undefined reference to `qt_blend_rgb16_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x24c): undefined reference to `qt_scale_image_argb32_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, int, QRectF const&, QRectF const&, QRect const&, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x250): undefined reference to `qt_scale_image_rgb16_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, int, QRectF const&, QRectF const&, QRect const&, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x258): undefined reference to `qt_transform_image_argb32_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, QRectF const&, QRectF const&, QRect const&, QTransform const&, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x25c): undefined reference to `qt_transform_image_rgb16_on_rgb16_neon(unsigned char*, int, unsigned char const*, int, QRectF const&, QRectF const&, QRect const&, QTransform const&, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x260): undefined reference to `qt_alphamapblit_quint16_neon(QRasterBuffer*, int, int, QRgba64 const&, unsigned char const*, int, int, int, QClipData const*, bool)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x264): undefined reference to `qt_memrotate90_16_neon(unsigned char const*, int, int, int, unsigned char*, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x268): undefined reference to `qt_destFetchRGB16_neon(unsigned int*, QRasterBuffer*, int, int, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x26c): undefined reference to `qt_destStoreRGB16_neon(QRasterBuffer*, int, int, unsigned int const*, int)'
/usr/bin/ld: qdrawhelper.cpp:(.text.startup+0x274): undefined reference to `qt_memrotate270_16_neon(unsigned char const*, int, int, int, unsigned char*, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/image/qimage.cpp.o: in function `QImage::fill(unsigned int)':
qimage.cpp:(.text+0x4ed8): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: qimage.cpp:(.text+0x4f08): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qcompositionfunctions.cpp.o: in function `rasterop_solid_NotSource(unsigned int*, int, unsigned int, unsigned int)':
qcompositionfunctions.cpp:(.text+0x1868): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qcompositionfunctions.cpp.o: in function `void comp_func_Clear_template<Argb32OperationsC>(Argb32OperationsC::Type*, int, unsigned int)':
qcompositionfunctions.cpp:(.text+0x1888): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qcompositionfunctions.cpp.o: in function `comp_func_solid_Source(unsigned int*, int, unsigned int, unsigned int)':
qcompositionfunctions.cpp:(.text+0x18ec): undefined reference to `qt_memfill32(unsigned int*, unsigned int, int)'
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qcompositionfunctions.cpp.o:qcompositionfunctions.cpp:(.text+0x1964): more undefined references to `qt_memfill32(unsigned int*, unsigned int, int)' follow
/usr/bin/ld: src/gui/CMakeFiles/Gui.dir/painting/qimagescale.cpp.o: in function `qSmoothScaleImage(QImage const&, int, int)':
qimagescale.cpp:(.text+0x2db8): undefined reference to `void qt_qimageScaleAARGBA_up_x_down_y_neon<false>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
/usr/bin/ld: qimagescale.cpp:(.text+0x2dd4): undefined reference to `void qt_qimageScaleAARGBA_down_x_up_y_neon<false>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
/usr/bin/ld: qimagescale.cpp:(.text+0x2ddc): undefined reference to `void qt_qimageScaleAARGBA_down_xy_neon<false>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
/usr/bin/ld: qimagescale.cpp:(.text+0x2e34): undefined reference to `void qt_qimageScaleAARGBA_up_x_down_y_neon<true>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
/usr/bin/ld: qimagescale.cpp:(.text+0x2e50): undefined reference to `void qt_qimageScaleAARGBA_down_x_up_y_neon<true>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
/usr/bin/ld: qimagescale.cpp:(.text+0x2e58): undefined reference to `void qt_qimageScaleAARGBA_down_xy_neon<true>(QImageScale::QImageScaleInfo*, unsigned int*, int, int, int, int)'
collect2: error: ld returned 1 exit status
[14/518] Building CXX object src/plugins/tls/openssl/CMakeFiles/QTlsBackendOpenSSLPlugin.dir/qsslsocket_openssl_symbols.cpp.o
ninja: build stopped: subcommand failed.
    jsulmJ 1 Reply Last reply
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  • jsulmJ Offline
    jsulmJ Offline
    jsulm Lifetime Qt Champion
    replied to Evan_muhaha on last edited by
    #2

    @Evan_muhaha said in Undefined Reference to Neon Functions when building Qt6-base from source on Raspberry Pi Zero 2 w:

    tar xf qtbase-everywhere-src-6.7.3.tar.xz
    mkdir qtbase-everywhere-src-6.7.3/build
    cd qtbase-everywhere-src-6.7.3/build

    cmake -G Ninja \

    Thisis not how Qt is built. You first need to call configure. Follow https://wiki.qt.io/Cross-Compile_Qt_6_for_Raspberry_Pi

    https://forum.qt.io/topic/113070/qt-code-of-conduct

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  • E Offline
    E Offline
    Evan_muhaha
    wrote on last edited by Evan_muhaha
    #3

    Hi @jsulm, I'm not quite familiar with the build process since I'm quite new to this. I know this link is a Cross Compile tutorial for Raspberry pi 4B, what build configuration should I use instead for the Pi zero 2 w when calling configure? (with native build, considering the pi zero 2 is armv8, cortex-a53, and neon support)? thank you!

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