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Building gobject-introspection for an x86 CPU variant with AVX512 fails when g-ir-scanner runs the freshly built target binaries under qemu-user: qemu: uncaught target signal 4 (Illegal instruction) - core dumped The Qemu TCG engine implements AVX, AVX2, F16C, FMA3 and VAES since Qemu 7.2, but it does not implement the AVX512 instruction set at all [0]. Therefore no -cpu value passed through BR2_PACKAGE_HOST_QEMU_USER_MODE_ARGS can make such binaries run, and user-mode emulation is simply not possible for these CPU variants. Mark those CPUs as unsupported by host-qemu, the same way it is already done for x86_steamroller and x86_core_avx2. This relies on the existing BR2_X86_CPU_HAS_AVX512 symbol, so all AVX512 capable variants are covered, and it disables gobject-introspection and nodejs, which are the two packages needing host-qemu in user mode. [0] https://gitlab.com/qemu-project/qemu/-/issues/2878 Fixes: https://autobuild.buildroot.org/results/7ed7f9c36dae1ddb965a0f0021db6cd319927b47/ Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> Assisted-by: Claude:claude-opus-5 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.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 https://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