@@ -549,7 +549,7 @@ LDFLAGS_MODULE =
CFLAGS_KERNEL =
RUSTFLAGS_KERNEL =
AFLAGS_KERNEL =
-export LDFLAGS_vmlinux =
+LDFLAGS_vmlinux =
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := \
@@ -1248,6 +1248,11 @@ vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
@:
PHONY += vmlinux
+# LDFLAGS_vmlinux flags from the top Makefile and arch/*/Makefile should be
+# exported for building the top vmlinux, but not for building decompressors.
+# They have the same base name (arch/*/boot/compressed/vmlinux), but the
+# decompressor Makefiles should not inherit LDFLAGS_vmlinux.
+vmlinux: export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
vmlinux: vmlinux.o $(KBUILD_LDS) modpost
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
Commit 3ec8a5b33dea ("kbuild: do not export LDFLAGS_vmlinux") unexported LDFLAGS_vmlinux because LDFLAGS_vmlinux in the top Makefile and the one in arch/*/boot/compressed/Makefile are unrelated to each other. It is just the decompressors, arch/*/boot/compressed/vmlinux just happen to have the same base name. Commit 5d4aeffbf709 ("kbuild: rebuild .vmlinux.export.o when its prerequisite is updated") accidentally exported it again. The issue reported so far is $(NM) error message when building the ARM decompressor with GNU Make >= 4.4. This was fixed by refactoring arch/arm/boot/compressed/Makefile. The error message fixed by 3ec8a5b33dea is very likely to happen in the current cleaning code, but it would still be possible on systems with a huge number of CPUs. Anyway, LDFLAGS_vmlinux should not be exported to the decompressor Makefiles. Fixes: 5d4aeffbf709 ("kbuild: rebuild .vmlinux.export.o when its prerequisite is updated") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> --- Makefile | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)