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-rw-r--r--scripts/Makefile.modpost114
1 files changed, 52 insertions, 62 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 911606496341..7740ce3b29e8 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -32,49 +32,58 @@
# Step 4 is solely used to allow module versioning in external modules,
# where the CRC of each module is retrieved from the Module.symvers file.
-# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
-# This is solely useful to speed up test compiles
-
PHONY := __modpost
__modpost:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
-MODPOST = scripts/mod/modpost \
+modpost-args = \
$(if $(CONFIG_MODVERSIONS),-m) \
$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
+ $(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
+ $(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
-o $@
-ifdef MODPOST_VMLINUX
-
-quiet_cmd_modpost = MODPOST $@
- cmd_modpost = $(MODPOST) $<
-
-vmlinux.symvers: vmlinux.o
- $(call cmd,modpost)
-
-__modpost: vmlinux.symvers
-
-else
+# 'make -i -k' ignores compile errors, and builds as many modules as possible.
+ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
+modpost-args += -n
+endif
ifeq ($(KBUILD_EXTMOD),)
-input-symdump := vmlinux.symvers
-output-symdump := modules-only.symvers
-
-quiet_cmd_cat = GEN $@
- cmd_cat = cat $(real-prereqs) > $@
+# Generate the list of in-tree objects in vmlinux
+# ---------------------------------------------------------------------------
-ifneq ($(wildcard vmlinux.symvers),)
-
-__modpost: Module.symvers
-Module.symvers: vmlinux.symvers modules-only.symvers FORCE
- $(call if_changed,cat)
-
-targets += Module.symvers
+# This is used to retrieve symbol versions generated by genksyms.
+ifdef CONFIG_MODVERSIONS
+vmlinux.symvers Module.symvers: .vmlinux.objs
+endif
+# Ignore libgcc.a
+# Some architectures do '$(CC) --print-libgcc-file-name' to borrow libgcc.a
+# from the toolchain, but there is no EXPORT_SYMBOL in it.
+
+quiet_cmd_vmlinux_objs = GEN $@
+ cmd_vmlinux_objs = \
+ for f in $(real-prereqs); do \
+ case $${f} in \
+ *libgcc.a) ;; \
+ *) $(AR) t $${f} ;; \
+ esac \
+ done > $@
+
+targets += .vmlinux.objs
+.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
+ $(call if_changed,vmlinux_objs)
+
+vmlinux.o-if-present := $(wildcard vmlinux.o)
+output-symdump := vmlinux.symvers
+
+ifdef KBUILD_MODULES
+output-symdump := $(if $(vmlinux.o-if-present), Module.symvers, modules-only.symvers)
+missing-input := $(filter-out $(vmlinux.o-if-present),vmlinux.o)
endif
else
@@ -86,54 +95,37 @@ src := $(obj)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
include $(or $(wildcard $(src)/Kbuild), $(src)/Makefile)
-# modpost option for external modules
-MODPOST += -e
-
-input-symdump := Module.symvers $(KBUILD_EXTRA_SYMBOLS)
+module.symvers-if-present := $(wildcard Module.symvers)
output-symdump := $(KBUILD_EXTMOD)/Module.symvers
+missing-input := $(filter-out $(module.symvers-if-present), Module.symvers)
-endif
-
-existing-input-symdump := $(wildcard $(input-symdump))
+modpost-args += -e $(addprefix -i ,$(module.symvers-if-present) $(KBUILD_EXTRA_SYMBOLS))
-# modpost options for modules (both in-kernel and external)
-MODPOST += \
- $(addprefix -i ,$(existing-input-symdump)) \
- $(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
- $(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)
+endif # ($(KBUILD_EXTMOD),)
-# 'make -i -k' ignores compile errors, and builds as many modules as possible.
-ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
-MODPOST += -n
+ifneq ($(KBUILD_MODPOST_WARN)$(missing-input),)
+modpost-args += -w
endif
-# Clear VPATH to not search for *.symvers in $(srctree). Check only $(objtree).
-VPATH :=
-$(input-symdump):
- @echo >&2 'WARNING: Symbol version dump "$@" is missing.'
- @echo >&2 ' Modules may not have dependencies or modversions.'
- @echo >&2 ' You may get many unresolved symbol warnings.'
+modorder-if-needed := $(if $(KBUILD_MODULES), $(MODORDER))
-# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined symbols
-ifneq ($(KBUILD_MODPOST_WARN)$(filter-out $(existing-input-symdump), $(input-symdump)),)
-MODPOST += -w
-endif
+MODPOST = scripts/mod/modpost
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
- cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
-
-$(output-symdump): $(MODORDER) $(input-symdump) FORCE
- $(call if_changed,modpost)
+ cmd_modpost = \
+ $(if $(missing-input), \
+ echo >&2 "WARNING: $(missing-input) is missing."; \
+ echo >&2 " Modules may not have dependencies or modversions."; \
+ echo >&2 " You may get many unresolved symbol warnings.";) \
+ sed 's/ko$$/o/' $(or $(modorder-if-needed), /dev/null) | $(MODPOST) $(modpost-args) $(vmlinux.o-if-present) -T -
targets += $(output-symdump)
+$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(moudle.symvers-if-present) $(MODPOST) FORCE
+ $(call if_changed,modpost)
__modpost: $(output-symdump)
-ifneq ($(KBUILD_MODPOST_NOFINAL),1)
- $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
-endif
-
PHONY += FORCE
FORCE:
@@ -141,6 +133,4 @@ existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
-endif
-
.PHONY: $(PHONY)