This adds an option to objtool to exit with an error when it enounters warnings. Then, it adds a config to enable that flag. This enables you to fail the build e.g. when noinstr is violated. When that happens, you also get a more verbose log, for example when failing noisntr validation it dumps disassembly of the offending code. Signed-off-by: Brendan Jackman <jackmanb@xxxxxxxxxx> --- Changes in v3: - Added --verbose to objtool args (equivalent to OBJTOOL_VERBOSE=1, which Josh Poimboeuf suggested). - Link to v2: https://lore.kernel.org/r/20241218-objtool-strict-v2-0-a5297c961434@xxxxxxxxxx Changes in v2: - Renamed flag/config to -Werror/CONFIG_*_WERROR - Applied to all objool runs instead of just vmlinux. - Link to v1: https://lore.kernel.org/r/20241213-objtool-strict-v1-0-fd388f9d971f@xxxxxxxxxx --- Brendan Jackman (2): objtool: Add --Werror kbuild: Add option to fail build on vmlinux objtool issues lib/Kconfig.debug | 10 ++++++++++ scripts/Makefile.lib | 1 + tools/objtool/builtin-check.c | 6 ++++++ tools/objtool/check.c | 7 ++----- tools/objtool/include/objtool/builtin.h | 1 + 5 files changed, 20 insertions(+), 5 deletions(-) --- base-commit: 5bc55a333a2f7316b58edc7573e8e893f7acb532 change-id: 20241213-objtool-strict-cb9a0a75139e Best regards, -- Brendan Jackman <jackmanb@xxxxxxxxxx>
