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The protobuf support breaks the build, as protobuf includes libabseil-cpp headers, which now require C++14. opencv3 doesn't have any ENABLE_CXX14 option, so for the time being, disable protobuf support until someone bothers enough to fix this up. While we suspect a libabseil-cpp version bump to be responsible for the issue, we are not 100% sure. However, the issue is definitely present in Buildroot 2025.02.x, as it can be reproduced using the following defconfig: BR2_aarch64=y BR2_TOOLCHAIN_EXTERNAL=y BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y BR2_PACKAGE_OPENCV3=y BR2_PACKAGE_OPENCV3_LIB_SHAPE=y BR2_PACKAGE_OPENCV3_LIB_STITCHING=y BR2_PACKAGE_OPENCV3_LIB_SUPERRES=y BR2_PACKAGE_OPENCV3_LIB_TS=y BR2_PACKAGE_OPENCV3_LIB_VIDEOSTAB=y BR2_PACKAGE_OPENCV3_WITH_PROTOBUF=y Fixes: https://autobuild.buildroot.net/results/39432e7746e6bc5224592a7d2f744ca992bd529a/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Julien Olivain <ju.o@free.fr>
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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches