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Using toolchains based on GCC14 (and newer), now turns this warning into a systematic error (see [1]). The build failure can be reproduced with this minimal defconfig: BR2_x86_64=y BR2_x86_atom=y BR2_TOOLCHAIN_EXTERNAL=y BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y BR2_PACKAGE_NGREP=y BR2_PACKAGE_LIBNET=y [1] https://gcc.gnu.org/gcc-14/porting_to.html Fixes: https://autobuild.buildroot.org/results/20b/20b924c5c96b3f43e381d87e59fb160ba8d3dcd0// Signed-off-by: Thomas Bonnefille <thomas.bonnefille@bootlin.com> [Romain: - add a defconfig to reproduce the issue - add the minimal gcc version to reproduce the issue ] Signed-off-by: Romain Naour <romain.naour@smile.fr>