src := $(obj)
-.PHONY: __clean
+PHONY := __clean
__clean:
+# Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir
+# Usage:
+# $(Q)$(MAKE) $(clean)=dir
+clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
+
# The filename Kbuild has precedence over Makefile
-include $(if $(wildcard $(srctree)/$(src)/Kbuild), \
- $(srctree)/$(src)/Kbuild, $(srctree)/$(src)/Makefile)
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
# Figure out what we need to build from the various variables
# ==========================================================================
subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
-# build a list of files to remove, usually releative to the current
+# build a list of files to remove, usually relative to the current
# directory
-__clean-files := $(extra-y) $(EXTRA_TARGETS) $(always) \
+__clean-files := $(extra-y) $(always) \
$(targets) $(clean-files) \
$(host-progs) \
$(hostprogs-y) $(hostprogs-m) $(hostprogs-)
# Descending
# ---------------------------------------------------------------------------
-.PHONY: $(subdir-ymn)
+PHONY += $(subdir-ymn)
$(subdir-ymn):
$(Q)$(MAKE) $(clean)=$@
cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
-# Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir
-# Usage:
-# $(Q)$(MAKE) $(clean)=dir
-clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
+
+# 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.
+
+.PHONY: $(PHONY)