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Since glibc 2.28, <sys/sysmacros.h> is no longer implicitly included by <sys/types.h>, which means major() is only defined if you include <sys/sysmacros.h>. This wasn't really visible for a while in loadable plugins built by lirc-tools as they could happily be built with undefined symbols... except they would fail to load at runtime. But then GCC 14.x brought more strict checking of having the function prototype around, which now detects this issue at build time. So the actual issue has been around since we switched to glibc 2.28, but it only started failing to build since gcc 14.x. The first failure is on August 2024, so this patch should be backported to our stable branches. The fix is backport from an upstream commit, post 0.10.2. Fixes: https://autobuild.buildroot.net/results/2f64accd430d9467add3f1195f3f59eff8e99a4d/ Minimal reproducer: BR2_arm=y BR2_cortex_a9=y BR2_ARM_ENABLE_VFP=y BR2_TOOLCHAIN_EXTERNAL=y BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV7_EABIHF_GLIBC_STABLE=y BR2_INIT_NONE=y BR2_SYSTEM_BIN_SH_NONE=y # BR2_PACKAGE_BUSYBOX is not set BR2_PACKAGE_LIRC_TOOLS=y # BR2_TARGET_ROOTFS_TAR is not set Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches