# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
-# 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
# Determine target architecture for the sandbox
include include/host_arch.h
$(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
# To make sure we do not include .config for any of the *config targets
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
-scripts: scripts_basic include/config/auto.conf
+scripts: scripts_basic scripts_dtc include/config/auto.conf
$(Q)$(MAKE) $(build)=$(@)
ifeq ($(dot-config),1)
endif
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)
+# disable pointer signed / unsigned warnings in gcc 4.0
+KBUILD_CFLAGS += -Wno-pointer-sign
+
# disable stringop warnings in gcc 8+
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
-ifeq ($(cc-name),clang)
+ifdef CONFIG_CC_IS_CLANG
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
-else
+endif
# 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)
-endif
# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
ifeq ($(CONFIG_USE_DEFAULT_ENV_FILE),y)
prepare1: $(defaultenv_h)
+
+envtools: $(defaultenv_h)
endif
archprepare: prepare1 scripts_basic
$(call filechk,defaultenv.h)
# ---------------------------------------------------------------------------
+# Devicetree files
+
+ifneq ($(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
+
+# ---------------------------------------------------------------------------
quiet_cmd_cpp_lds = LDS $@
cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) \
-D__ASSEMBLY__ -x assembler-with-cpp -std=c99 -P -o $@ $<
$(DOC_TARGETS): scripts_basic FORCE
$(Q)$(MAKE) $(build)=doc $@
-endif #ifeq ($(config-targets),1)
-endif #ifeq ($(mixed-targets),1)
-
PHONY += checkstack ubootrelease ubootversion
checkstack:
# 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