PHONY := _all
_all:
-# o Do not use make's built-in rules and variables
-# (this increases performance and avoids hard-to-debug behaviour);
-# o Look for make include files relative to root of kernel src
-MAKEFLAGS += -rR --include-dir=$(CURDIR)
+# Do not use make's built-in rules and variables
+# (this increases performance and avoids hard-to-debug behaviour)
+MAKEFLAGS += -rR
# Avoid funny character set dependencies
unexport LC_ALL
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
+# Look for make include files relative to root of kernel src
+#
+# This does not become effective immediately because MAKEFLAGS is re-parsed
+# once after the Makefile is read. It is OK since we are going to invoke
+# 'sub-make' below.
+MAKEFLAGS += --include-dir=$(CURDIR)
+
PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
outputmakefile:
ifneq ($(KBUILD_SRC),)
$(Q)ln -fsn $(srctree) source
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
- $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
endif
ifeq ($(cc-name),clang)
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
+KBUILD_CFLAGS += -Wno-unused-but-set-variable
endif
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
# warn about C99 declaration after statement
-KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
+KBUILD_CFLAGS += -Wdeclaration-after-statement
+
+# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
+KBUILD_CFLAGS += $(call cc-option,-Wvla)
# disable pointer signed / unsigned warnings in gcc 4.0
-KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
+KBUILD_CFLAGS += -Wno-pointer-sign
# disable stringop warnings in gcc 8+
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
-scripts: scripts_basic asm-generic gcc-plugins $(autoksyms_h)
+scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h)
$(Q)$(MAKE) $(build)=$(@)
# Things we need to do before we recursively start building the kernel
$(srctree)/tools/testing/selftests/*/config
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+# ---------------------------------------------------------------------------
+# Devicetree files
+
+ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
+dtstree := arch/$(SRCARCH)/boot/dts
+endif
+
+ifneq ($(dtstree),)
+
+%.dtb: prepare3 scripts_dtc
+ $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
+
+PHONY += dtbs dtbs_install
+dtbs: prepare3 scripts_dtc
+ $(Q)$(MAKE) $(build)=$(dtstree)
+
+dtbs_install:
+ $(Q)$(MAKE) $(dtbinst)=$(dtstree)
+
+ifdef CONFIG_OF_EARLY_FLATTREE
+all: dtbs
+endif
+
+endif
+
+PHONY += scripts_dtc
+scripts_dtc: scripts_basic
+ $(Q)$(MAKE) $(build)=scripts/dtc
+
# ---------------------------------------------------------------------------
# Modules
@echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
@echo ' .config.'
@echo ''
+ @$(if $(dtstree), \
+ echo 'Devicetree:'; \
+ echo '* dtbs - Build device tree blobs for enabled boards'; \
+ echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+ echo '')
+
@echo 'Userspace tools targets:'
@echo ' use "make tools/help"'
@echo ' or "cd tools; make help"'
export_report:
$(PERL) $(srctree)/scripts/export_report.pl
-endif #ifeq ($(config-targets),1)
-endif #ifeq ($(mixed-targets),1)
-
PHONY += checkstack kernelrelease kernelversion image_name
# UML needs a little special treatment here. It wants to use the host
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
# read all saved command lines
-
-cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
+cmd_files := $(wildcard .*.cmd)
ifneq ($(cmd_files),)
$(cmd_files): ; # Do not try to update included dependency files
include $(cmd_files)
endif
+endif # ifeq ($(config-targets),1)
+endif # ifeq ($(mixed-targets),1)
endif # skip-makefile
PHONY += FORCE