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- #
- # 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
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