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x86 and x86_64 kernels >= 6.15 now requires ssp toolchain support when CONFIG_STACKPROTECTOR is enabled [1]. For toolchains without SSP support, make sure to disable CONFIG_STACKPROTECTOR to avoid link issues when building kernel modules. MODPOST Module.symvers ERROR: modpost: "__stack_chk_guard" [drivers/<module>.ko] undefined! While the SSP support is mandatory for glibc and musl based toolchains [2], it's still optional for uClibc-ng based toolchains and not enabled by default when building a new toolchain. The Toolchain builder project enabled recently the SSP support for all uClibc toolchains [3] to avoid such issue. But x86 (32bits) musl based toolchains lack of SSP support due to a long term gcc issue [4]. For a decade Alpine Linux, OpenWRT and Yocto povide additional gcc and musl patches to workaround the gcc issue [5] We may consider in the long term removing the support for toolchains without SSP and doing so removing x86 (32bits) musl toolchain. Fixes: https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832356731 (x86-64--uclibc--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832356104 (x86-64--uclibc--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832355429 (x86-64-core-i7--uclibc--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832354341 (x86-64-core-i7--uclibc--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832326525 (x86-64-v2--uclibc--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15832316220 (x86-64-v2--uclibc--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139512 (x86-i686--uclibc--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139511 (x86-i686--uclibc--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139510 (x86-i686--musl--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139509 (x86-i686--musl--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139506 (x86-core2--uclibc--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139505 (x86-core2--uclibc--bleeding-edge_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139504 (x86-core2--musl--stable_test) https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/15819139503 (x86-core2--musl--bleeding-edge_test) [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0ee2689b9374d6fd5f43b703713a53227 [2]e811f51549[3]90413f6657[4] https://www.openwall.com/lists/musl/2016/12/04/2 [5] https://git.alpinelinux.org/aports/tree/main/musl/APKBUILD#n65 https://git.alpinelinux.org/aports/tree/main/gcc/0018-Alpine-musl-package-provides-libssp_nonshared.a.-We-.patch https://github.com/openwrt/openwrt/blob/v25.12.5/toolchain/gcc/patches-15.x/230-musl_libssp.patch https://github.com/openwrt/openwrt/blob/v25.12.5/toolchain/musl/patches/200-add_libssp_nonshared.patch77fb841f2eCc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Romain Naour <romain.naour@smile.fr> 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 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