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authorMasahiro Yamada <masahiroy@kernel.org>2019-12-19 01:04:28 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-01-07 02:18:38 +0900
commit56d5893615727bce4a8769c6b22340e20f9a3c33 (patch)
tree83fbc8a94b2bdbdc7c1c873454db396cbea3f90f /scripts/Makefile.build
parent0186b1267b421f9169ead7dec6723294677443c8 (diff)
downloadlinux-56d5893615727bce4a8769c6b22340e20f9a3c33.tar.bz2
kbuild: do not create orphan built-in.a or obj-y objects
Both 'obj-y += foo/' and 'obj-m += foo/' request Kbuild to visit the sub-directory foo/, but the difference is that only the former combines foo/built-in.a into the built-in.a of the current directory because everything in sub-directories visited by obj-m is supposed to be modular. So, it makes sense to create built-in.a only if that sub-directory is reachable by the chain of obj-y. Otherwise, built-in.a will not be linked into vmlinux anyway. For the same reason, it is pointless to compile obj-y objects in the directory visited by obj-m. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/Makefile.build')
-rw-r--r--scripts/Makefile.build2
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index b734ac8a654e..e46b4ee9a120 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -66,7 +66,7 @@ lib-target := $(obj)/lib.a
real-obj-y += $(obj)/lib-ksyms.o
endif
-ifneq ($(strip $(real-obj-y) $(need-builtin)),)
+ifdef need-builtin
builtin-target := $(obj)/built-in.a
endif