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authorNicolas Pitre <nicolas.pitre@linaro.org>2016-04-22 15:25:00 -0400
committerMichal Marek <mmarek@suse.com>2016-04-26 10:39:19 +0200
commit2441e78b19192cd9ea1ce93027a5732a2117f026 (patch)
tree64d942caf22837e283f6be06e63e71aabe7ea4bc
parentba79d401f1aee52186ff09607e9405cfb805307d (diff)
kbuild: better abstract vmlinux sequential prerequisites
When CONFIG_TRIM_UNUSED_KSYMS=y and CONFIG_BUILD_DOCSRC=y it is possible to get the following error: ERROR: "cn_del_callback" [Documentation/connector/cn_test.ko] undefined! ERROR: "cn_add_callback" [Documentation/connector/cn_test.ko] undefined! ERROR: "cn_netlink_send" [Documentation/connector/cn_test.ko] undefined! ../scripts/Makefile.modpost:91: recipe for target '__modpost' failed It is not sufficient to do "vmlinux-dirs += Documentation" as this also depends on the headers_check target, and all of this needs to be done before adjust_autoksyms.sh is executed. Let's sort this out by gathering those sequential prerequisites in a make target of their own, separate from the vmlinux target. And by doing so, the special autoksyms_recursive target is no longer needed. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org>
-rw-r--r--Makefile31
1 files changed, 15 insertions, 16 deletions
diff --git a/Makefile b/Makefile
index e9ad498238e7..3f1eb6a1bf8d 100644
--- a/Makefile
+++ b/Makefile
@@ -926,17 +926,11 @@ export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Doc
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
-# Final link of vmlinux
- cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
-quiet_cmd_link-vmlinux = LINK $@
-
-# Include targets which we want to
-# execute if the rest of the kernel build went well.
-vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
-ifdef CONFIG_TRIM_UNUSED_KSYMS
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
- "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile autoksyms_recursive"
-endif
+# Include targets which we want to execute sequentially if the rest of the
+# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
+# evaluated more than once.
+PHONY += vmlinux_prereq
+vmlinux_prereq: $(vmlinux-deps) FORCE
ifdef CONFIG_HEADERS_CHECK
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
@@ -946,17 +940,22 @@ endif
ifdef CONFIG_GDB_SCRIPTS
$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
endif
- +$(call if_changed,link-vmlinux)
-
-autoksyms_recursive: $(vmlinux-deps)
+ifdef CONFIG_TRIM_UNUSED_KSYMS
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
- "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile autoksyms_recursive"
-PHONY += autoksyms_recursive
+ "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
+endif
# standalone target for easier testing
include/generated/autoksyms.h: FORCE
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
+# Final link of vmlinux
+ cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
+quiet_cmd_link-vmlinux = LINK $@
+
+vmlinux: scripts/link-vmlinux.sh vmlinux_prereq FORCE
+ +$(call if_changed,link-vmlinux)
+
# Build samples along the rest of the kernel
ifdef CONFIG_SAMPLES
vmlinux-dirs += samples