Messages in this thread Patch in this message | | | Date | Mon, 29 Apr 2024 22:07:56 +0000 | Subject | [PATCH] kernel/configs: Disable LTO on kernel/configs.o | From | Yifan Hong <> |
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This solves an incremental build issue that, when a config changes, config_data and config_data.gz is rebuilt, but because the thinlto-cache cannot be updated, the config is not reflected in the final vmlinux binary.
The issue is described in https://github.com/ClangBuiltLinux/linux/issues/2021.
Signed-off-by: Yifan Hong <elsk@google.com> --- kernel/Makefile | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/Makefile b/kernel/Makefile index 10ef068f598d..76d9acc49c5f 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -140,6 +140,10 @@ obj-$(CONFIG_SCF_TORTURE_TEST) += scftorture.o $(obj)/configs.o: $(obj)/config_data.gz +# Disable LTO on configs.o so changes in .config is reflected in vmlinux. See +# https://github.com/ClangBuiltLinux/linux/issues/2021 +CFLAGS_REMOVE_configs.o += $(CC_FLAGS_LTO) + targets += config_data config_data.gz $(obj)/config_data.gz: $(obj)/config_data FORCE $(call if_changed,gzip) -- 2.45.0.rc1.225.g2a3ae87e7f-goog
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