# # Copyright (C) 2006-2015 OpenWrt.org # # This is free software, licensed under the GNU General Public License v2. # See /LICENSE for more information. # ifneq ($(__prereq_inc),1) __prereq_inc:=1 prereq: if [ -f $(TMP_DIR)/.prereq-error ]; then \ echo; \ cat $(TMP_DIR)/.prereq-error; \ rm -f $(TMP_DIR)/.prereq-error; \ echo; \ false; \ fi .SILENT: prereq endif PREREQ_PREV= # 1: display name # 2: error message define Require export PREREQ_CHECK=1 ifeq ($$(CHECK_$(1)),) prereq: prereq-$(1) prereq-$(1): $(if $(PREREQ_PREV),prereq-$(PREREQ_PREV)) FORCE printf "Checking '$(1)'... " if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \ echo 'ok.'; \ else \ echo 'failed.'; \ echo "$(PKG_NAME): $(strip $(2))" >> $(TMP_DIR)/.prereq-error; \ fi check-$(1): FORCE $(call Require/$(1)) CHECK_$(1):=1 .SILENT: prereq-$(1) check-$(1) .NOTPARALLEL: endif PREREQ_PREV=$(1) endef define RequireCommand define Require/$(1) which $(1) endef $$(eval $$(call Require,$(1),$(2))) endef define RequireHeader define Require/$(1) [ -e "$(1)" ] endef $$(eval $$(call Require,$(1),$(2))) endef define QuoteHostCommand '$(subst ','"'"',$(strip $(1)))' endef # 1: display name # 2: failure message # 3: test define TestHostCommand define Require/$(1) ($(3)) >/dev/null 2>/dev/null endef $$(eval $$(call Require,$(1),$(2))) endef # 1: canonical name # 2: failure message # 3+: candidates define SetupHostCommand define Require/$(1) for cmd in $(call QuoteHostCommand,$(3)) $(call QuoteHostCommand,$(4)) \ $(call QuoteHostCommand,$(5)) $(call QuoteHostCommand,$(6)) \ $(call QuoteHostCommand,$(7)) $(call QuoteHostCommand,$(8)) \ $(call QuoteHostCommand,$(9)); do \ if [ -n "$$$$$$$$cmd" ]; then \ bin="$$$$$$$$(PATH="$(subst $(space),:,$(filter-out $(STAGING_DIR_HOST)/%,$(subst :,$(space),$(PATH))))" \ which "$$$$$$$${cmd%% *}")"; \ if [ -x "$$$$$$$$bin" ] && eval "$$$$$$$$cmd" >/dev/null 2>/dev/null; then \ mkdir -p "$(STAGING_DIR_HOST)/bin"; \ ln -sf "$$$$$$$$bin" "$(STAGING_DIR_HOST)/bin/$(strip $(1))"; \ exit 0; \ fi; \ fi; \ done; \ exit 1 endef $$(eval $$(call Require,$(1),$(if $(2),$(2),Missing $(1) command))) endef