# (Note that we only rebuild this makefile automatically for some
# targets, see project_config.mk for details.)
SDKCONFIG_MAKEFILE ?= $(abspath $(BUILD_DIR_BASE)/include/config/auto.conf)
-include $(SDKCONFIG_MAKEFILE)
+-include $(SDKCONFIG_MAKEFILE)
export SDKCONFIG_MAKEFILE # sub-makes (like bootloader) will reuse this path
# BATCH_BUILD flag disables interactive terminal features, defaults to verbose build
#
# if V=1, $(summary) does nothing and $(details) will echo extra details
# if V is unset or not 1, $(summary) echoes a summary and $(details) does nothing
+VERBOSE ?=
V ?= $(VERBOSE)
ifeq ("$(V)","1")
summary := @true
# disable echoing of commands, directory names
MAKEFLAGS += --silent
+endif # $(V)==1
+
+ifdef CONFIG_MAKE_WARN_UNDEFINED_VARIABLES
+MAKEFLAGS += --warn-undefined-variables
endif
# General make utilities
#
# example $(call resolvepath,$(CONFIG_PATH),$(CONFIG_DIR))
define resolvepath
-$(foreach dir,$(1),$(if $(filter /%,$(dir)),$(dir),$(subst //,/,$(2)/$(dir))))
+$(abspath $(foreach dir,$(1),$(if $(filter /%,$(dir)),$(dir),$(subst //,/,$(2)/$(dir)))))
endef
define prereq_if_explicit
$(filter $(1),$(MAKECMDGOALS))
endef
+
+# macro to kill duplicate items in a list without messing up the sort order of the list.
+# Will only keep the unique items; if there are non-unique items in the list, it will remove
+# the later recurring ones so only the first one remains.
+# Copied from http://stackoverflow.com/questions/16144115/makefile-remove-duplicate-words-without-sorting
+define uniq
+$(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))
+endef
+
+# macro to strip leading ../s from a path
+# Given $(1) which is a directory, remove any leading ../s from it
+# (recursively keeps removing ../ until not found)
+# if the path contains nothing but ../.., a single . is returned (cwd)
+define stripLeadingParentDirs
+$(foreach path,$(1),$(if $(subst ..,,$(path)),$(if $(filter ../%,$(path)),$(call stripLeadingParentDirs,$(patsubst ../%,%,$(path))),$(path)),.))
+endef