diff options
Diffstat (limited to 'scripts/Makefile.modpost')
| -rw-r--r-- | scripts/Makefile.modpost | 114 |
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) |