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This patch is based on works [1] and [2]. With this patch, one can run the Qt5 WebEngine quicknanobrowser sample with the following options. BR2_TOOLCHAIN_BUILDROOT_LIBC="glibc" and BR2_TOOLCHAIN_BUILDROOT_CXX (Qt 5 needs a toolchain w/ wchar, NPTL, C++, dynamic library; for now it builds only with glibc) BR2_PACKAGE_LIBERATION (Qt needs at least one font) BR2_PACKAGE_QT5BASE_EXAMPLES (to install quicknanobrowser sample) BR2_PACKAGE_QT5BASE_GIF (do display gif) BR2_PACKAGE_QT5BASE_JPEG (do display jpeg) BR2_PACKAGE_QT5BASE_PNG (do display png) BR2_PACKAGE_QT5QUICKCONTROLS (needed by webengine) BR2_PACKAGE_QT5QUICKCONTROLS2 (needed by webengine) BR2_PACKAGE_QT5WEBENGINE (because it is what we want) Qt WebEngine requires an Open(E)GL-capable backend. As an example, the package rpi-userland must be enabled to build for a rpi. BR2_PACKAGE_RPI_USERLAND (to enable OpenGL ES backend) To browse for HTTPS websites, please consider adding the following options as well for SSL/TLS. BR2_PACKAGE_CA_CERT (for certificates) BR2_PACKAGE_NTPD (to sync date for certificates) Since version 5.9, chromium requires udev at runtime (see note 4). BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV (input backend) To run quicknanobrowser # cd /usr/lib/qt/examples/webengine/quicknanobrowser/ # ./quicknanobrowser https://www.buildroot.org/ Note: The chromium.inc has been generated using the following command. ( echo 'CHROMIUM_LICENSE_FILES = \' && cd output/build/qt5webengine-5.9.1/ && \ find "src/3rdparty/chromium/" -type f -iname "*LICENSE*" -o -iname "*COPYING*" -o -iname "*GPL*" | \ sed -e '/\.asm$/d' \ -e '/\.h$/d' \ -e '/\.c$/d' \ -e '/\.cc$/d' \ -e '/\.cpp$/d' \ -e '/\.pyc\?$/d' \ -e '/\.pl$/d' \ -e '/\.sha1$/d' \ -e '/\.patch$/d' \ -e '/licensecheck/d' \ -e 's,^,\t,' \ -e 's,$, \\,' | \ sort && \ echo '' ) >package/qt5/qt5webengine/chromium.inc Note 2: Since 5.9.1, the chromium's copy of opus fails with neon [3]. Qt WebEngine can uses buildroot ffmpeg copy which compiles fine (using qmake flag WEBENGINE_CONFIG+=use_system_ffmpeg). It implies selecting the following options. BR2_PACKAGE_FFMPEG BR2_PACKAGE_OPUS BR2_PACKAGE_LIBVPX BR2_PACKAGE_WEBP BR2_PACKAGE_WEBP_DEMUX In file included from ../../3rdparty/chromium/third_party/opus/src/silk/arm/NSQ_neon.c:31:0: /home/gportay/src/buildroot/output-rpi3-qt5.9/host/lib/gcc/arm-buildroot-linux-gnueabihf/6.4.0/include/arm_neon.h:8997:1: error: inlining failed in call to always_inline ‘vld1q_s32’: target specific option mismatch vld1q_s32 (const int32_t * __a) ^~~~~~~~~ ../../3rdparty/chromium/third_party/opus/src/silk/arm/NSQ_neon.c:40:15: note: called from here int32x4_t coef0 = vld1q_s32(coef32); ^~~~~ ../../3rdparty/chromium/third_party/opus/src/silk/arm/NSQ_neon.c: At top level: cc1: warning: unrecognized command line option ‘-Wno-#pragma-messages’ Note 3: Version 5.6.2 causes a build issue while building chromium. The build against this version is disabled until the release 5.6.3 is out. Note 4: Here is trace when udev does not run # cd /usr/lib/qt/examples/webengine/quicknanobrowser # ./quicknanobrowser QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root' Unable to query physical screen size, defaulting to 100 dpi. To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters). [0101/000248.161973:WARNING:resource_bundle_qt.cpp(114)] locale_file_path.empty() for locale [0101/000248.384693:WARNING:resource_bundle_qt.cpp(114)] locale_file_path.empty() for locale [202:223:0101/000248.484954:FATAL:udev_loader.cc(38)] Check failed: false. #0 0x0000742b93de <unknown> #1 0x0000742c3c38 <unknown> #2 0x000073e1e1aa <unknown> buildroot#3 0x000073e1d96e <unknown> #4 0x000073e1defa <unknown> buildroot#5 0x000074af6364 <unknown> buildroot#6 0x000074302878 <unknown> #7 0x0000742c8fee <unknown> #8 0x0000742c9f44 <unknown> buildroot#9 0x0000742ca21e <unknown> buildroot#10 0x0000742cac4c <unknown> buildroot#11 0x0000742c87b2 <unknown> #12 0x0000742da4f6 <unknown> #13 0x000073ed9d38 <unknown> buildroot#14 0x000073eda03c <unknown> buildroot#15 0x0000742e9aec <unknown> #16 0x0000742e71dc <unknown> Aborted Note 5: On rpi and depending on what is insinde the .config, more GPU memory should be allocated to run properly qt samples. #0 0x0000742c63de <unknown> #1 0x0000742d0c38 <unknown> #2 0x0000749d7bde <unknown> buildroot#3 0x0000749e3c70 <unknown> #4 0x00007530227c <unknown> buildroot#5 0x000075302480 <unknown> buildroot#6 0x0000752fb1e4 <unknown> #7 0x00007430f878 <unknown> #8 0x0000742d5fee <unknown> buildroot#9 0x0000742d6f44 <unknown> buildroot#10 0x0000742d721e <unknown> buildroot#11 0x0000742d7ad6 <unknown> #12 0x0000742d57b2 <unknown> #13 0x0000742e74f6 <unknown> buildroot#14 0x0000742f6a74 <unknown> buildroot#15 0x0000742f41dc <unknown> Received signal 6 #0 0x0000742c63de <unknown> #1 0x0000742c66a0 <unknown> #2 0x0000725b5d10 <unknown> [end of stack trace] qml: Render process exited with code 256 (abnormal exit) # mount /dev/mmcblk0p1 /mnt # sed '/^gpu_mem_/s,=.*,=200,' -i /mnt/config.txt # umount /mnt Note 6: The first patch fixes a build issue when samples are compiled without the support of printing [4]. This patch is already merged in branch 5.9 [5] and concerns only 5.9.1. 085c2c52 Always compile QWebEnginePage::print It fixes the error below. .obj/browsermainwindow.o: In function `BrowserMainWindow::printRequested(QWebEnginePage*)': browsermainwindow.cpp:(.text+0x2cc0): undefined reference to `QWebEnginePage::print(QPrinter*, QWebEngineCallback<bool> const&)' The second patch loads both libEGL and libGLESv2 symbols implicitly instead of loading them with explicitly using hard-coded locations. It fixes a bug when providers of lib*GL does not create libraries named libEGL.so.1 and libGLESv2.s2 [6]. This patch is already merged in branch 5.9 [7]. d4c621f6 Load libEGL and libGLES2 symbols implicitly It fixes the error below. [327:347:1221/085837:ERROR:surface_factory_qt.cpp(68)] Failed to load /usr/lib/libGLESv2.so.2: /usr/lib/libGLESv2.so.2: cannot open shared object file: No such file or directory [1]: http://lists.busybox.net/pipermail/buildroot/2015-July/132010.html [2]: https://patchwork.ozlabs.org/patch/640633/ [3]: https://patchwork.ozlabs.org/patch/791332/ [4]: https://bugreports.qt.io/browse/QTBUG-61510 [5]: https://codereview.qt-project.org/#/c/198041/ [6]: https://bugreports.qt.io/browse/QTBUG-57761 [7]: https://codereview.qt-project.org/#/c/199554/ Cc: Akihiko Odaki <[email protected]> Cc: Julien Corjon <[email protected]> Signed-off-by: Gaël PORTAY <[email protected]> [Arnout: - move more dependencies to _ARCH_DEPENDS; - mention all toolchain dependencies in the comments] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <[email protected]>
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