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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> #3 0x000073e1d96e <unknown> #4 0x000073e1defa <unknown> #5 0x000074af6364 <unknown> #6 0x000074302878 <unknown> #7 0x0000742c8fee <unknown> #8 0x0000742c9f44 <unknown> #9 0x0000742ca21e <unknown> #10 0x0000742cac4c <unknown> #11 0x0000742c87b2 <unknown> #12 0x0000742da4f6 <unknown> #13 0x000073ed9d38 <unknown> #14 0x000073eda03c <unknown> #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> #3 0x0000749e3c70 <unknown> #4 0x00007530227c <unknown> #5 0x000075302480 <unknown> #6 0x0000752fb1e4 <unknown> #7 0x00007430f878 <unknown> #8 0x0000742d5fee <unknown> #9 0x0000742d6f44 <unknown> #10 0x0000742d721e <unknown> #11 0x0000742d7ad6 <unknown> #12 0x0000742d57b2 <unknown> #13 0x0000742e74f6 <unknown> #14 0x0000742f6a74 <unknown> #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 <akihiko.odaki.4i@stu.hosei.ac.jp> Cc: Julien Corjon <corjon.j@ecagroup.com> Signed-off-by: Gaël PORTAY <gael.portay@savoirfairelinux.com> [Arnout: - move more dependencies to _ARCH_DEPENDS; - mention all toolchain dependencies in the comments] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> |
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Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches