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kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y
When CONFIG_DEBUG_INFO_BTF_MODULES=y, running 'make modules'
in the clean kernel tree will get the following error.
$ grep CONFIG_DEBUG_INFO_BTF_MODULES .config
CONFIG_DEBUG_INFO_BTF_MODULES=y
$ make -s clean
$ make modules
[snip]
AR vmlinux.a
ar: ./built-in.a: No such file or directory
make: *** [Makefile:1241: vmlinux.a] Error 1
'modules' depends on 'vmlinux', but builtin objects are not built.
Define KBUILD_BUILTIN.
Fixes: f73edc8951
("kbuild: unify two modpost invocations")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Makefile
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Makefile
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@ -1545,6 +1545,7 @@ endif
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# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES
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# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES
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# is an exception.
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# is an exception.
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ifdef CONFIG_DEBUG_INFO_BTF_MODULES
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ifdef CONFIG_DEBUG_INFO_BTF_MODULES
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KBUILD_BUILTIN := 1
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modules: vmlinux
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modules: vmlinux
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endif
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endif
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