[PATCH v2 5/8] kbuild: move vmlinux.o rule to the top Makefile

Masahiro Yamada
2022-09-06T06:14:18Z

Move the build rules of vmlinux.o out of scripts/link-vmlinux.sh to
clearly separate 1) pre-modpost, 2) modpost, 3) post-modpost stages.
This will make furture refactoring possible.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

(no changes since v1)

Makefile | 10 ++++++++--
scripts/link-vmlinux.sh | 3 ---
2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index cf06ace9da3a..e4c270256849 100644
--- a/Makefile
+++ b/Makefile
@@ -645,6 +645,8 @@ else
__all: modules
endif

+targets :=
+
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.

@@ -1149,6 +1151,10 @@ quiet_cmd_autoksyms_h = GEN $@
$(autoksyms_h):
$(call cmd,autoksyms_h)

+targets += vmlinux.o
+vmlinux.o: autoksyms_recursive $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
+
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)

# Final link of vmlinux with optional arch pass after final link
@@ -1156,10 +1162,10 @@ cmd_link-vmlinux = \
$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)

-vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
+vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE
+$(call if_changed_dep,link-vmlinux)

-targets := vmlinux
+targets += vmlinux

# The actual objects are generated when descending,
# make sure no implicit rule kicks in
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 161bca64e8aa..07486f90d5e2 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -214,9 +214,6 @@ if [ "$1" = "clean" ]; then
exit 0
fi

-#link vmlinux.o
-${MAKE} -f "${srctree}/scripts/Makefile.vmlinux_o"
-
# modpost vmlinux.o to check for section mismatches
${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1

--
2.34.1