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The Qt package currently fails to build on ARMv8 cores in 32-bit mode (for example, if you select ARM and then Cortex-A53), because the ARM atomic operation implementation in Qt checks if we're on ARMv7, then on ARMv6, and otherwise falls back to an ARMv5 implementation. The latter uses the swp instruction, which doesn't exist on ARMv8, causing a build failure. To solve this, we simply add a patch that uses the ARMv7 atomic operations for ARMv8-A. There is no autobuilder reference because we don't have any ARMv8 32-bit configuration in the autobuilders. Cc: <ivychend@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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