include scripts/Makefile.host
endif
-ifneq ($(KBUILD_SRC),)
-# Create output directory if not already present
-_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
-
-# Create directories for object files if directory does not exist
-# Needed when obj-y := dir/file.o syntax is used
-_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
-endif
-
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif
obj-y += $(obj)/lib-ksyms.o
endif
-ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
+ifneq ($(strip $(obj-y) $(need-builtin)),)
builtin-target := $(obj)/built-in.o
endif
endif
endif
+ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
+ cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ;
+endif
+
# Do section mismatch analysis for each module/built-in.o
ifdef CONFIG_DEBUG_SECTION_MISMATCH
cmd_secanalysis = ; scripts/mod/modpost $@
objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check)
+objtool_args += $(if $(part-of-module), --module,)
+
ifndef CONFIG_FRAME_POINTER
objtool_args += --no-fp
endif
else
objtool_args += $(call cc-ifversion, -lt, 0405, --no-unreachable)
endif
+ifdef CONFIG_RETPOLINE
+ objtool_args += --retpoline
+endif
+
ifdef CONFIG_MODVERSIONS
objtool_o = $(@D)/.tmp_$(@F)
$(wildcard include/config/orc/unwinder.h \
include/config/stack/validation.h)
+ifdef CONFIG_RETPOLINE
+cmd_ubuntu_retpoline = $(CONFIG_SHELL) $(srctree)/scripts/ubuntu-retpoline-extract-one $(@) $(<) "$(filter -m16 %code16gcc.h,$(a_flags))";
+else
+cmd_ubuntu_retpoline =
+endif
+
define rule_cc_o_c
$(call echo-cmd,checksrc) $(cmd_checksrc) \
$(call cmd_and_fixdep,cc_o_c) \
+ $(cmd_checkdoc) \
$(call echo-cmd,objtool) $(cmd_objtool) \
$(cmd_modversions_c) \
+ $(call echo-cmd,ubuntu-retpoline) $(cmd_ubuntu_retpoline) \
$(call echo-cmd,record_mcount) $(cmd_record_mcount)
endef
define rule_as_o_S
$(call cmd_and_fixdep,as_o_S) \
$(call echo-cmd,objtool) $(cmd_objtool) \
- $(cmd_modversions_S)
+ $(cmd_modversions_S) \
+ $(call echo-cmd,ubuntu-retpoline) $(cmd_ubuntu_retpoline)
endef
# List module undefined symbols (or empty line if not enabled)
# Built-in and composite module parts
$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
$(call cmd,force_checksrc)
+ $(call cmd,force_check_kmsg)
$(call if_changed_rule,cc_o_c)
# Single-part modules are special since we need to mark them in $(MODVERDIR)
$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
$(call cmd,force_checksrc)
+ $(call cmd,force_check_kmsg)
$(call if_changed_rule,cc_o_c)
@{ echo $(@:.o=.ko); echo $@; \
$(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
targets += $(multi-used-y) $(multi-used-m)
-
+targets := $(filter-out $(PHONY), $(targets))
+
+# kmsg check tool
+ifneq ($(KBUILD_KMSG_CHECK),0)
+ ifeq ($(KBUILD_KMSG_CHECK),2)
+ kmsg_cmd := print
+ quiet_cmd_force_check_kmsg = KMSG_PRINT $<
+ $(shell [ -d $(objtree)/man ] || mkdir -p $(objtree)/man)
+ else
+ kmsg_cmd := check
+ quiet_cmd_force_check_kmsg = KMSG_CHECK $<
+ endif
+ cmd_force_check_kmsg = $(KMSG_CHECK) $(kmsg_cmd) $(CC) $(c_flags) $< ;
+endif
# Descending
# ---------------------------------------------------------------------------
PHONY += $(subdir-ym)
$(subdir-ym):
- $(Q)$(MAKE) $(build)=$@
+ $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
-targets := $(wildcard $(sort $(targets)))
-cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
+cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
+ifneq ($(KBUILD_SRC),)
+# Create directories for object files if they do not exist
+obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
+# If cmd_files exist, their directories apparently exist. Skip mkdir.
+exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files))))
+obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs)))
+ifneq ($(obj-dirs),)
+$(shell mkdir -p $(obj-dirs))
+endif
+endif
+
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.